Abstract: A positive electrode for a rechargeable lithium battery includes a positive active material for a rechargeable lithium battery that includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least a portion of the primary particles has a radial arrangement structure, and a second positive active material having a monolith structure, wherein the first and second positive active materials each include a nickel-based positive active material, and an X-ray diffraction (XRD) peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3. Further embodiments provide a method of manufacturing the positive electrode for rechargeable lithium battery, and a rechargeable lithium battery including the same.

Abstract: A positive active material for a rechargeable lithium battery includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least one part of the primary particles has a radial arrangement structure, as well as a second positive active material having a monolith structure. The first and second positive active materials may both include nickel-based positive active materials. A method of preparing the positive active material, and a rechargeable lithium battery including a positive electrode including the positive active material are also provided.

Abstract: The present disclosure provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a trimethylsilyl phosphate (TMSPa) additive, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. The non-aqueous liquid electrolyte for a lithium secondary battery of the present disclosure is capable of forming a solid SEI membrane in the negative electrode when initially charging a lithium secondary battery comprising the same, is capable of improving an output property of the lithium secondary battery, and is also capable of enhancing an output property and a capacity property after high temperature storage.

Abstract: Disclosed is a cathode active material for secondary batteries comprising one or more compounds having a layered-crystal structure, represented by the following Formula 1, wherein a transition metal layer contains Li, in an amount lower than 20%, based on a total amount of a transition metal site, and a ratio of Ni positioned in a lithium layer, that is, a cation mixing ratio is 1% to 4.5%, based on a total amount of a lithium site in the lithium layer to stably support the layered-crystal structure: (1-s-t)[Li(LiaMn(1-a-x-y)NixCoy)O2]*s[Li2CO3]*t[LiOH] (1), wherein 0<a<0.2; 0<x<0.9; 0<y<0.5; a+x+y<1; 0<s<0.03; and 0<t<0.03. The cathode active material exhibits long lifespan and superior stability at room temperature and high temperatures in spite of repeated charge and discharge at a high current.

Abstract: An object of the present invention is to provide a positive active material for a nonaqueous electrolyte secondary battery which has a large discharge capacity and is superior in charge-discharge cycle performance, initial efficiency and high rate discharge performance, and a nonaqueous electrolyte secondary battery using the positive active material. The present invention pertains to a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide which has a crystal structure of an ?-NaFeO2 type, is represented by a compositional formula Li1+?Me1??O2 (Me is a transition metal element including Co, Ni and Mn, ?>0), and has a molar ratio Li/Me of Li to the transition metal element Me of 1.2 to 1.6, wherein a molar ratio Co/Me of Co in the transition metal element Me is 0.02 to 0.23, a molar ratio Mn/Me of Mn in the transition metal element Me is 0.62 to 0.

Abstract: According to this production method, the water content of a mixture of a chromium oxide (Cr2O3) powder and a sodium carbonate (Na2CO3) powder is brought to 1000 ppm or less, and the mixture is heated in an inert gas atmosphere at a calcination temperature (850 DEG C.) where the sodium carbonate and the chromium oxide undergo a calcination reaction. Sodium chromite is thereby obtained.

Abstract: A template-free reverse micelle (RM) based method is used to synthesize pyrochlore nanostructures having photocatalytic activity. In one embodiment, the method includes separately mixing together a first acid stabilized aqueous solution including pyrochlore precursor A and a second acid stabilized aqueous solution including pyrochlore precursor B with an organic solution including a surfactant to form an oil-in-water emulsion. Next, equimolar solutions of the first and second acid stabilized oil-in-water emulsions are mixed together. Then, the mixture of the first and second acid stabilized oil-in-water emulsion is treated with a base to produce a precipitate including pyrochlore precursors A and B. After which, the precipitate is dried to remove volatiles. The precipitate is then calcined in the presence of oxygen to form a pyrochlore nanostructure, such as a bismuth titanate (Bi2Ti2O7) pyrochlore nanorod. The method of synthesizing the pyrochlore nanorod is template-free.

Abstract: There is provided a novel positive electrode active material for a secondary battery. A positive electrode active material for a secondary battery according to the present exemplary embodiment is represented by the following formula (I):Lia(NixCryMn2-x-y-zM1z)O4(I) wherein 0<x, 0<y, 0<z, x+y+z<2, and 0?a?2; and M1 contains at least one selected from the group consisting of Na and Mg. A positive electrode for a secondary battery according to the present exemplary embodiment has the positive electrode active material for a secondary battery according to the present exemplary embodiment.

Abstract: According to this production method, the water content of a mixture of a chromium oxide (Cr2O3) powder and a sodium carbonate (Na2CO3) powder is brought to 1000 ppm or less, and the mixture is heated in an inert gas atmosphere at a calcination temperature (850 DEG C.) where the sodium carbonate and the chromium oxide undergo a calcination reaction. Sodium chromite is thereby obtained.

Abstract: Provided is a transition metal precursor comprising a composite transition metal compound represented by Formula I, as a transition metal precursor used in the preparation of a lithium-transition metal composite oxide: M(OH1?x)2??(1) wherein M is two or more selected from the group consisting of Ni, Co, Mn, Al, Cu, Fe, Mg, B, Cr and transition metals of period 2 in the Periodic Table of the Elements; and 0<x<0.5.

Abstract: A thermistor based on a composition having the general formula (I): Re2-x-yCraMnbMcEyOz wherein Re is a rare earth metal or a mixture of two or more rare earth metals, M is a metal selected from the group consisting of nickel, cobalt, copper, magnesium and mixtures thereof, E is a metal selected from the group consisting of calcium, strontium, barium and mixtures thereof, x is the sum of a+b+c and is a number between 0.1 and 1, and the relative ratio of the molar fractions a, b and c is in an area bounded by points A, B, C and D in a ternary diagram, wherein point A is, if y<0.006, at (Cr=0.00, Mn=0.93+10?y, M=0.07?10?y), and, if y?0.006, at (Cr=0?00, Mn=0.99, M=0.01), point B is, if y<0.006, at (Cr=0.83, Mn=0.10+10?y, M=0.07?10?y), and, if y?0.006, at (Cr=0.83, Mn=0.16, M=0.01), point C is at (Cr=0.50, Mn=0.10, M=0.40) and point D is at (Cr=0.00, Mn=0.51, M=0.49), y is a number between 0 and 0.5?x, and z is a number between 2.5 and 3.5.

Abstract: The present invention relates to lithium manganate particles having a primary particle diameter of 1 to 8 ?m and forming substantially single-phase particles, which have a composition represented by the following chemical formula: Li1+xMn2-x-yY1yO4+Y2 in which Y1 is at least one element selected from the group consisting of Ni, Co, Mg, Fe, Al, Cr and Ti; Y2 is P and is present in an amount of 0.01 to 0.6 mol % based on Mn; and x and y satisfy 0.03?x?0.15 and 0.05?y?0.20, respectively, and which lithium manganate particles have a specific surface area of the lithium manganate particles of 0.3 to 0.9 m2/g (as measured by BET method); and have an average particle diameter (D50) of the lithium manganate particles of 3 to 10 ?m. A positive electrode active substance of a lithium ion secondary battery using the lithium manganate particles of the present invention has a high output and is excellent in high-temperature stability.

Abstract: A method of manufacturing a lithium cell is disclosed. The method can include providing a lithium cell having an operating voltage range, where the lithium cell includes a negative electrode, a positive electrode, and an electrolyte in contact with, and between, the negative electrode and the positive electrode. The negative electrode can include lithium titanate and the electrolyte can include an additive. The method can also include reducing the additive to form a coating on a surface of the negative electrode in contact with the electrolyte. The reducing step can include overcharging the lithium cell to a voltage greater than an upper limit of the operating voltage range and dropping a voltage of the negative electrode to 0.2-1V vs. lithium.

Abstract: Disclosed is a clean method for preparing layered double hydroxides (LDHs), in which hydroxides of different metals are used as starting materials for production of LDHs by atom-economical reactions. The atom efficiency of the reaction is 100% in each case because all the atoms of the reactants are converted into the target product since only M2+(OH)2, M3+(OH)3, and CO2 or HnAn? are used, without any NaOH or other materials. Since there is no by-product, filtration or washing process is unnecessary. The consequent reduction in water consumption is also beneficial to the environment.

Abstract: Process for preparing a mixed metal oxide powder, in which oxidizable starting materials are evaporated and oxidized, the reaction mixture is cooled after the reaction and the pulverulent solids are removed from gaseous substances, wherein as starting materials, at least one pulverulent metal and at least one metal compound, the metal and the metal component of the metal compound being different and the proportion of metal being at least 80% by weight based on the sum of metal and metal component from metal compound, together with one or more combustion gases, are fed to an evaporation zone of a reactor, where metal and metal compound are evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the starting materials and combustion gases completely.

Abstract: The present invention relates to a method for producing a nanocrystalline mixed oxide material containing copper and chromium as well as the mixed oxide material containing copper and chromium produced by the method according to the invention and its use as catalyst, in particular for dehydrogenating alcohols, for hydrogenation reactions, for reducing nitrocompounds, for hydrogenating carboxylic acids and for hydrogenating free fatty acids to fatty alcohols.

Abstract: This invention relates to a method for producing chromates, especially for producing alkali metal chromates. The method comprises following steps: the obtaining of a mixture of alkali metal hydroxide, alkali metal chromate, and ferrous residue after the reaction of chromite ore with an oxidant in the reactor in the presence of molten salt or in aqueous solution of alkali metal hydroxide, the obtaining of a leaching slurry by leaching the reaction products with aqueous solution of alkali metal hydroxide, the separating of the primary chromate product from the leaching slurry, the obtaining of pure chromate crystal by purifying the primary chromate product. Both the primary chromate product and the pure chromate crystal can be used as the raw materials to manufacture other chromium compounds. Compared with the currently-used roasting method, the method has the advantages of decreasing the reaction temperature by about 700° C.

Abstract: A procedure for obtaining mixed multimetallic oxides derived from hydrotalcite type compounds, characterized in that the laminar metallic hydroxides obtained are constituted by three or four metallic cations, forming part of the sheets of the hydrotalcite type material represented by the formula: [M(II)1?x?y?zM(II)?xM(III)yM(III)?z(OH)2](An?y+z/n).mH2O. by a process comprising: (1) preparing an aqueous or organic solution containing three or more cations; (2) preparing an alkaline solution; (3) slowly combining solutions (1) and (2) to cause the co-precipitation of the cations in the form of hydroxides; (4) washing the precipitate containing the hydrotalcites with water, until removal of the non-precipitated ions; (5) drying; and (6) calcining the hydrotalcites.

Abstract: There is provided Lithium-manganese oxides expressed as the following chemical formula 1, Li1+xMn1?x?yMyO2+z,??[Chemical Formula 1] wherein 0.01?x?0.5, 0?y?0.3, ?0.2?z?0.2, and M is a metal selected from the group consisting of Ti, Mn, V, Cr, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, W, Ag, Sn, Ge, Si, Al, and alloy thereof.

Abstract: Provided here is a method of producing a monolithic body from a porous matrix, comprising: (i) providing a porous matrix having interstitial spaces and comprising at least a first reactant; (ii) contacting the porous matrix with an infiltrating medium that carries at least a second reactant; (iii) allowing the infiltrating medium to infiltrate at least a portion of the interstitial spaces of the porous matrix under conditions that promote a reaction between the at least first reactant and the at least second reactant to provide at least a first product; and (iv) allowing the at least first product to form and fill at least a portion of the interstitial spaces of the porous matrix, thereby producing a monolithic body, wherein the monolithic body does not comprise barium titanate.

Abstract: An insulating target material for obtaining a conductive complex oxide film represented by a general formula ABO3. The insulating target material includes: an oxide of an element A; an oxide of an element B; an oxide of an element X; and at least one of an Si compound and a Ge compound, the element A being at least one element selected from La, Ca, Sr, Mn, Ba, and Re, the element B being at least one element selected from Ti, V, Sr, Cr, Fe, Co, Ni, Cu, Ru, Ir, Pb, and Nd, and the element X being at least one element selected from Nb, Ta, and V.

Abstract: Disclosed is a process for producing a secondary battery cathode material by calcining raw materials. The process is characterized by calcining the raw materials together with one or more substances, which are selected from the group consisting of hydrogen, water and water vapor, and conductive carbon and/or a substance, which can form conductive carbon by pyrolysis, added thereto. As crystals of the secondary battery cathode material obtained by this process have been controlled fine sizes, the secondary battery cathode material promotes movements of ions of an alkali metal led by lithium between the interiors of grains of the cathode material and an electrolyte to suppress polarization in an electrode reaction, and further, increases an area of contact between the positive material and a conductivity-imparting material to provide improved conductivity so that improvements are assured in voltage efficiency and specific battery capacity.

Abstract: Oxygen is reduced in the presence of a catalyst at the cathode of an alkaline-electrolyte fuel cell. Catalysts of the formula Sr3?xA1+xCo4?yByO10.5?z wherein ?0.6?x?1.0; 0?y?3; and ?1.5?z?0.5; wherein A represents Eu, Gd, Tb, Dy, Ho, or Y; and wherein B represents Fe, Ga, Cu, Ni, Mn, and Cr, demonstrate high catalytic activity and high chemical stability when used as the oxygen-reduction catalyst in alkaline fuel cells.

Abstract: Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost. A production method of an electroconductive mayenite type compound comprising a step of subjecting a precursor to heat treatment, is a method for preparing an electroconductive mayenite type compound, comprising a step of subjecting a precursor to heat treatment; wherein the precursor is a vitreous or crystalline material, which contains Ca and Al, in which a molar ratio of (CaO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, and in which a total amount of CaO and Al2O3 is at least 50 mol %, and wherein the heat treatment is heat treatment comprising holding the precursor at a heat treatment temperature T of from 600 to 1415° C. and in an inert gas or vacuum atmosphere with an oxygen partial pressure PO2 in a range of PO2?105×exp [{?7.9×l04/(T+273)}+14.4] in the unit of Pa.

Abstract: A process to produce mixed metal oxides and metal oxide compounds. The process includes evaporating a feed solution that contains at least two metal salts to form an intermediate. The evaporation is conducted at a temperature above the boiling point of the feed solution but below the temperature where there is significant crystal growth or below the calcination temperature of the intermediate. The intermediate is calcined, optionally in the presence of an oxidizing agent, to form the desired oxides. The calcined material can be milled and dispersed to yield individual particles of controllable size and narrow size distribution.

Abstract: A powdery compound selected from the group consisting of Li4Ti5O12 and its derivatives selected from the group consisting of Li4?xMxTi5O12 and Li4Ti5?yNyO12 (x and y between 0 and 0.2, M and N selected from the group consisting of Na, K, Mg, Nb, Al, Ni , Co, Zr, Cr, Mn, Fe, Cu, Zn, Si and Mo), used as active material of an electrode for a lithium storage battery, consists of unitary particles having a diameter not greater than 1 ?m and 10-50% volume agglomerated particles having a diameter not greater than 100 ?m wherein the agglomerated particles formed by agglomeration of said unitary particles. The method for producing such a compound preferably consists in grinding the synthesized oxide for a duration comprised between 24 hours and 48 hours in a planetary mill and in then performing thermal treatment at a temperature comprised between 450° C. and 600° C.

Abstract: Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost without need for expensive facilities, a reaction at high temperature and for a long period of time, or complicated control of reaction. A method for preparing an electroconductive mayenite type compound comprises a step of subjecting a precursor to heat treatment, wherein the precursor contains Ca and/or Sr, and Al, a molar ratio of (a total of CaO and SrO:Al2O3) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, a total content of CaO, SrO and Al2O3 in the precursor is at least 50 mol %, and the precursor is a vitreous or crystalline material; and the method comprises a step of mixing the precursor with a reducing agent and performing the heat treatment of holding the mixture at 600-1,415° C. in an inert gas or vacuum atmosphere with an oxygen partial pressure of at most 10 Pa.

Abstract: This invention relates to a Polyoxometalate (POM) represented by the formula: (An)m+[HqM16X8W48O184(OH)32]m? or solvates thereof, wherein: A represents a cation, n is the number of the cations A, m is the charge of the polyoxoanion, q is the number of protons and varies from 0 to 12, M represents a transition metal, and X represents a heteroatom selected from P, As and mixtures thereof. This invention also relates to a process to produce such POMs and to a process for the homogeneous or heterogeneous oxidation of organic substrates comprising contacting the organic substrate with such POMs.

Abstract: This invention relates to a process for preparing zirconium oxide, in its various forms, including zirconium-based mixed oxides. There is described a process for preparing a zirconium oxide in the absence of a cerium salt which comprises precipitating a zirconium hydroxide from an aqueous solution of a zirconium salt by reaction with an alkali in the presence of a controlled amount of sulphate anions at a temperature not greater than 50° C. and then calcining the hydroxide to form an oxide, wherein the oxide thus formed is essentially sulphate free. Catalysts and ceramics can be produced from the product oxides having improved thermal stability and improved sinterability, respectively. A particular use of the product oxide is as a promoter or catalyst support in automobile exhaust systems.

Abstract: The invention relates to an oxide material of general formula (I) A2?x?yA?XA?yM1?z M?Z04+?, wherein A and A? are independently a metal cation of a group formed by lanthanides and/or alkalis and/or alkaline earths, A? is a cationic gap, i.e. a cation vacancy A and/or A?, M and M? are independently a metal of a group formed by transition metals such as 0<y<0.30, preferably 0<y=0.20; 0<?<0.25, preferably 0<?<0.10; 0=x=1; and 0=z=1. An air electrode containing said material and an electric power producing device in the form of a fuel cell provided with at least one electrochemical cell comprising said electrode are also disclosed.

Abstract: There is provided Lithium-manganese oxides expressed as the following chemical formula 1, Li1+xMn1?x?yMyO2+z, ??[Chemical Formula 1] wherein 0.01?x?0.5, 0?y?0.3, ?0.2?z?0.2, and M is a metal selected from the group consisting of Ti, Mn, V, Cr, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, W, Ag, Sn, Ge, Si, Al, and alloy thereof.

Abstract: Methods and systems for processing metal oxides from metal containing solutions. Metal containing solutions are mixed with heated aqueous oxidizing solutions and processed in a continuous process reactor or batch processing system. Combinations of temperature, pressure, molarity, Eh value, and pH value of the mixed solution are monitored and adjusted so as to maintain solution conditions within a desired stability area during processing. This results in metal oxides having high or increased pollutant loading capacities and/or oxidation states. These metal oxides may be processed according to the invention to produce co-precipitated oxides of two or more metals, metal oxides incorporating foreign cations, metal oxides precipitated on active and inactive substrates, or combinations of any or all of these forms.

Abstract: According to an aspect of the present invention, there is provided a sintered electroconductive oxide containing a perovskite phase of perovskite-type crystal structure represented by the composition formula: M1aM2bM3cAldCreOf where M1 is at least one of elements of group 3A other than La; M2 is at least one of elements of group 2A; M3 is at least one of elements of groups 4A, 5A, 6A, 7A and 8 other than Cr; and a, b, c, d, e and f satisfy the following conditional expressions: 0.600?a?1.000; 0?b?0.400; 0.150?c<0.600; 0.400?d?0.800; 0<e?0.050; 0<e/(c+e)?0.18; and 2.80?f?3.30. With the use of this conductive oxide sintered body, it becomes possible to carry out proper temperature measurements over the temperature range from a low temperature of ?40° C. to a high temperature of 900° C. or higher.

Abstract: Materials with improved electron conductivity for use in rechargeable lithium ion electrochemical cells include, but are not limited to, lithium titanate spinels of the formula Li4Ti5O12 wherein a portion of Ti is replaced with one or more substitution ions of transition metals. The substitution ions are not in their highest oxidation states and have free valence electrons thereby increasing electron conductivity. The lithium titanate spinels with substitution ions have an unchanged crystal lattice structure and the substitution ions occupy the same crystal lattice sites as Ti. Solid state and polymerized complex methods of synthesizing spinels in addition to rechargeable lithium ion batteries utilizing the improved materials are also disclosed.

Abstract: The present invention provides a process for making a complex metal oxide comprising the formula AxByOz. The process comprises the steps of: (a) reacting in solution at a temperature of between about 75° C. to about 100° C. at least one water-soluble salt of A, at least one water-soluble salt of B and a stoichiometric amount of a carbonate salt or a bicarbonate salt required to form a mole of a carbonate precipitate represented by the formula AxBy(CO3)n, wherein the reacting is conducted in a substantial absence of carbon dioxide to form the carbonate precipitate and wherein the molar amount of carbonate salt or bicarbonate salt is at least three times the stoichiometric amount of carbonate or bicarbonate salt required to form a mole of the carbonate precipitate; and (b) reacting the carbonate precipitate with an oxygen containing fluid under conditions to form the complex metal oxide.

Abstract: The preparation of finely divided, alkali metal-containing metal oxide powders which contain at least one alkali metal and at least one further metal from the group consisting of the transition metals, the remaining main group metals, the lanthanides and actinides is described. Precursor compounds of these components are introduced in solid form or in the form of a solution or a suspension into a pulsation reactor having a gas flow resulting from a flameless combustion and partly or completely converted into the desired multicomponent metal oxide powder.

Abstract: Methods of producing a safe and hygienic method for industrially and efficiently producing a perovskite-type composite oxide are provided that can maintain the catalytic activity of a noble metal at a high level. Methods include preparing a precursor of the perovskite-type composite oxide by mixing organometal salts of elementary components of the perovskite-type composite oxide and heat treating the precursor. The precursor may be prepared by mixing all elementary components constituting the perovskite-type composite oxide, or by mixing one or more organometal salts of part of the elementary components with the other elementary components prepared as alkoxides, a coprecipitate of salts, or a citrate complex of the respective elements.

Abstract: A method for carrying out solid state reactions under reducing conditions is provided. Solid state reactants include at least one inorganic metal compound and a source of reducing carbon. The reaction may be carried out in a reducing atmosphere in the presence of reducing carbon. Reducing carbon may be supplied by elemental carbon, by an organic material, or by mixtures. The organic material is one that can form decomposition products containing carbon in a form capable of acting as a reductant. The reaction proceeds without significant covalent incorporation of organic material into the reaction product. In a preferred embodiment, the solid state reactants also include an alkali metal compound. The products of the method find use in lithium ion batteries as cathode active materials. Preferred active materials include lithium-transition metal phosphates and lithium-transition metal oxides.

Abstract: To provide a process for producing a lithium-cobalt composite oxide for a positive electrode of a lithium secondary battery excellent in volume capacity density, safety, charge and discharge cyclic durability, press density and productivity, by using in expensive cobalt hydroxide and lithium carbonate. A mixture having a cobalt hydroxide powder and a lithium carbonate powder mixed so that the atomic ratio of lithium/cobalt would be from 0.98 to 1.01, is fired in an oxygen-containing atmosphere at from 250 to 700° C., and the fired product is further fired in an oxygen-containing atmosphere at from 850 to 1,050° C., or such a mixture is heated at a temperature-raising rate of at most 4° C./min in a range from 250 to 600° C. and fired in an oxygen-containing atmosphere at from 850 to 1,050° C.

Abstract: Granular secondary particles of a lithium-manganese composite oxide suitable for use in non-aqueous electrolyte secondary batteries showing high-output characteristics which are granular secondary particles made up of aggregated crystalline primary particles of a lithium-manganese composite oxide and have many micrometer-size open voids therein with a defined average diameter and total volume of open voids. A process for producing the granular secondary particles which includes spray-drying a slurry of at least a manganese oxide, a lithium source, and an agent for open-void formation to thereby granulate the slurry and then calcining the granules.

Abstract: A method is described for the manufacture of hydrotalcites by using at least one compound of a bivalent metal (Component A) and at least one compound of a trivalent metal (Component B), wherein at least one of these components is not used in the form of a solution, characterized in that a) at least one of the Components A and/or B which is not used in the form of a solution, shortly before or during mixing of the components, and/or b) the mixture containing the Components A and B is subjected to intensive grinding until an average particle size (D50) in the range of approx. 0.1 to 5 ?m is obtained, and optionally, after aging treatment or hydrothermal treatment, the resulting hydrotalcite product is separated, dried, and optionally calcinated.

Abstract: Nanostructured chromium(III)-oxide-based materials using sol-gel processing and a synthetic route for producing such materials are disclosed herein. Monolithic aerogels and xerogels having surface areas between 150 m2/g and 520 m2/g have been produced. The synthetic method employs the use of stable and inexpensive hydrated-chromium(III) inorganic salts and common solvents such as water, ethanol, methanol, 1-propanol, t-butanol, 2-ethoxy ethanol, and ethylene glycol, DMSO, and dimethyl formamide. The synthesis involves the dissolution of the metal salt in a solvent followed by an addition of a proton scavenger, such as an epoxide, which induces gel formation in a timely manner. Both critical point (supercritical extraction) and atmospheric (low temperature evaporation) drying may be employed to produce monolithic aerogels and xerogels, respectively.

Abstract: Provided is a cathode composition for lithium secondary battery that includes a lithium-chromium-titanium-manganese oxide that has the formula Li[Li(1-x)/3CrxTi(2/3)yMn2(1-x-y)/3]O2 where 0?x?0.3, 0?y?0.3 and 0.1?x+y?0.3, and layered a-LiFeO2 structure. A method of synthesizing the lithium-chromium-titanium manganese oxide includes preparing a first mixed solution by dispersing titanium dioxide (TiO2) in a mixed solution of chrome acetate (Cr3(OH)2(CH3CO2)7) and manganese acetate ((CH3CO2)2Mn.4H2O), adding a lithium hydroxide (LiOH) solution to the first mixed solution to obtain homogeneous precipitates, forming precursor powder that has the formula Li[Li(1-x)/3CrxTi(2/3)yMn2(1-x-y)/3]O2 where 0?x?0.3, 0?y?0.3 and 0.1?x+y?0.3 by heating the homogeneous precipitates, and heating the precursor powder to form oxide powder having a layered structure.

Abstract: A low-temperature hydrothermal reaction is provided to generate crystalline perovskite nanotubes such as barium titanate (BaTiO3) and strontium titanate (SrTiO3) that have an outer diameter from about 1 nm to about 500 nm and a length from about 10 nm to about 10 micron. The low-temperature hydrothermal reaction includes the use of a metal oxide nanotube structural template, i.e., precursor. These titanate nanotubes have been characterized by means of X-ray diffraction and transmission electron microscopy, coupled with energy dispersive X-ray analysis and selected area electron diffraction (SAED).

Abstract: A method for producing a positive electrode material adapted to the Li-ion secondary batteries is disclosed. The produced material has the following formula (I), Li1+xMn2?yMyO4 ??(I) wherein M is Mg, Al, Cr, Fe, Co, or Ni; 0?x?0.4, and 0?y?0.2. The method is achieved by co-precipitating a gel salts with an organic acid. First, salts of Li, Mn and M are mixed with at least a solvent to form an initial solution. The mole ratio of Li, Mn and M ions in their respective salts is (1+x):(2?y):y. Next, at least a chelate is added into the initial solution to form a suspension, which is then filtered to obtain a co-precipitate. Finally, the co-precipitate is calcined and heated to obtain the final product.

Abstract: A process to produce mixed metal oxides and metal oxide compounds. The process includes evaporating a feed solution that contains at least two metal salts to form an intermediate. The evaporation is conducted at a temperature above the boiling point of the feed solution but below the temperature where there is significant crystal growth or below the calcination temperature of the intermediate. The intermediate is calcined, optionally in the presence of an oxidizing agent, to form the desired oxides. The calcined material can be milled and dispersed to yield individual particles of controllable size and narrow size distribution.

Abstract: A positive active material for non-aqueous electrolyte secondary battery is provided comprising lithium manganese oxide having such a spinel structure that the half-width (2?) of the reflection peak corresponding to 440 plane as determined by X-ray diffractometry using CuK? ray is not greater than 0.145°. The use of this positive active material makes it possible to obtain a secondary battery which exhibits a good cycle life performance at room temperature and high temperatures and a reduced capacity drop when stored at high temperatures.

Abstract: A composition suitable for use as a cathode material of a lithium battery includes a core material having an empirical formula LixM?zNi1?yM?yO2. “x” is equal to or greater than about 0.1 and equal to or less than about 1.3. “y” is greater than about 0.0 and equal to or less than about 0.5. “z” is greater than about 0.0 and equal to or less than about 0.2. M? is at least one member of the group consisting of sodium, potassium, nickel, calcium, magnesium and strontium. M? is at least one member of the group consisting of cobalt, iron, manganese, chromium, vanadium, titanium, magnesium, silicon, boron, aluminum and gallium. A coating on the core has a greater ratio of cobalt to nickel than the core. The coating and, optionally, the core can be a material having an empirical formula Lix1Ax2Ni1?y1?z1Coy1Bz1Oa. “x1” is greater than about 0.1 a equal to or less than about 1.3. “x2,” “y1” and “z1” each is greater than about 0.0 and equal to or less than about 0.2. “a” is greater than 1.5 and less than about 2.1.

Abstract: A method of preparing layered lithium-chromium-manganese oxides having the formula Li[CrxLi(1/3?x/3) Mn(2/3?2x/3)]O2 where 0.1?X?0.5 for lithium batteries. Homogeneous precipitation is prepared by adding lithium hydroxide (LiOH) solution to a mixed solution of chromium acetate (Cr3(OH)2(CH3CO2)7) and manganese acetate ((CH3CO2)2Mn.4H2O), while precursor powders are prepared by firing the precipitation. After that, the precursor powders are subjected to two heat treatment to yield Li[CrxLi(1/3?x/3) Mn(2/3?2x/3)]O2 with ?-LiFeO2 structure.

Abstract: The invention relates to a method for producing lithium-transition metal mixtures of general formula Lix(M1yM21-y)nOnz, wherein M1 represents nickel, cobalt or manganese, M2 represents chromium, cobalt, iron, manganese, molybdenum or aluminium, and is different from M1, n is 2 if M1 represents manganese and is 1 otherwise, x is comprised between 0.9 and 1.2, y is comprised between 0.5 and 1.0 and z is comprised between 1.9 and 2.1. According to the inventive method, an intimate mixture composed of transition metal compounds containing oxygen and of a lithium compound containing oxygen is calcinated, said mixture being obtained by processing a solid powder transition metal compound with a solution of said lithium compound, and then drying. At least the M1 compound is used in powder form having a specific surface of at least 20 m2/g (BET) and calcination is carried out in a fluidised bed.