Abstract: Disclosed is a positive electrode active material for a lithium ion secondary battery, including lithium-transition metal composite oxide of a layer crystal structure, in which the lithium-transition metal composite oxide contains an element that improves conductivity of electrons in the lithium-transition metal composite oxide. Use of this positive electrode active material can improve cycle characteristics, high rate characteristics and thermal stability of lithium ion secondary batteries. Furthermore, by use of this positive electrode active material, gas generation in batteries can be decreased.

Abstract: The present invention provides a hydrogen-storing carbonaceous material obtained by heating a carbonaceous material in a gas atmosphere including hydrogen gas and substantially including no reactive gas as impurity gas to store hydrogen.

Abstract: The present invention relates to metal oxides containing multiple dopants.

Abstract: The present invention provides a nonaqueous electrolyte secondary cell having a positive electrode composed mainly of a positive electrode active material, a negative electrode, and a nonaqueous electrolyte. The positive electrode active material is a lithium-containing transition metal composite oxide of a hexagonal crystal system that includes a compound represented by the general formula LiCo1-xMxO2, where M is at least one species selected from the group consisting of V, Cr, Fe, Mn, Ni, Al, and Ti, magnesium, and halogen. In a nonaqueous electrolyte secondary cell having such a construction, the high-temperature characteristics are improved without reducing the cell capacity.

Abstract: An electrochemical cell of either a primary or a secondary chemistry, is described. In either case, the cell has a negative electrode of lithium or of an anode material which is capable of intercalating and de-intercalating lithium coupled with a positive electrode of a cathode active material. A nitrate compound is mixed with either the anode material or the cathode active material prior to contact with its current collector. The resulting electrode couple is activated by a nonaqueous electrolyte. The electrolyte flows into and throughout the electrodes causing the nitrate additive to dissolve in the electrolyte. The nitrate solute is then able to contact the lithium to provide an electrically insulating and ionically conducting passivation layer thereon.

Abstract: The present invention is related to an electrochemical cell comprising an anode of a Group IA metal and a cathode of a mixed phase metal oxide prepared from a combination of starting materials comprising vanadium oxide and a mixture of at least one of a decomposable silver-containing constituent and a decomposable copper-containing constituent. The starting materials are mixed together to form a homogeneous admixture that is not further mixed once decomposition heating begins to form the product active material. The present cathode material is particularly useful for implantable medical applications.

Abstract: Because of the composition represented by General Formula: Li1+x+&agr;Ni(1−x−y+&dgr;)/2Mn(1−x−y−&dgr;)/2MyO2 (where 0≦x≦0.05, −0.05≦x+&agr;≦0.05, 0≦y≦0.4; −0.1≦&dgr;≦0.1 (when 0≦y≦0.2) or −0.24≦&dgr;≦0.24 (when 0.2≦y≦0.4); and M is at least one element selected from the group consisting of Ti, Cr, Fe, Co, Cu, Zn, Al, Ge and Sn), a high-density lithium-containing complex oxide with high stability of a layered crystal structure and excellent reversibility of charging/discharging can be provided, and a high-capacity non-aqueous secondary battery excellent in durability is realized by using such an oxide for a positive electrode.

Abstract: In the nonaqueous secondary battery of this invention, a positive electrode includes, as an active material, a composite oxide represented by a composition formula, LixMn2−y−zNiyMzOq, wherein M is at least one element selected from the group consisting of B, Mg, Al, Ti, V, Fe, Co, Cu, Zn, Ga, Y, Zr, Nb, Mo and In; 1.20≦x≦1.80; y≧0.10; z≧0; y+z≦1.90; and 3.70≦q≦4.30, in a discharge state during fabrication of the nonaqueous secondary battery. As a result, the nonaqueous secondary battery can exhibit good charge-discharge cycle performance and can be fabricated at low cost.

Abstract: A new sandwich cathode design having a second cathode active material of a relatively high energy density but of a relatively low rate capability sandwiched between two current collectors and with a first cathode active material having a relatively low energy density but of a relatively high rate capability in contact with the opposite sides of the two current collectors, is described. The present cathode design is useful for powering an implantable medical device requiring a high rate discharge application.

Abstract: An electrochemical active material contains a lithiated zirconium, titanium, or mixed titanium/zirconium oxide. The oxide can be represented by the formula LiM′M″XO4, where M′ is a transition metal, M″ is an optional three valent non-transition metal, and X is zirconium, titanium, or a combination of the two. Preferably, M′ is nickel, cobalt, iron, manganese, vanadium, copper, chromium, molybdenum, niobium, or combinations thereof. The active material provides a useful composite electrode when combined with a polymeric binder and electrically conductive material. The active material can be made into a cathode for use in a secondary electrochemical cell. Rechargeable batteries may be made by connecting a number of such electrochemical cells.

Abstract: An electrochemical active material contains a lithiated zirconium, titanium, or mixed titanium/zirconium oxide. The oxide can be represented by the formula LiM′M″XO4, where M′ is a transition metal, M″ is an optional three valent non-transition metal, and X is zirconium, titanium, or a combination of the two. Preferably, M′ is nickel, cobalt, iron, manganese, vanadium, copper, chromium, molybdenum, niobium, or combinations thereof. The active material provides a useful composite electrode when combined with a polymeric binder and electrically conductive material. The active material can be made into a cathode for use in a secondary electrochemical cell. Rechargeable batteries may be made by connecting a number of such electrochemical cells.

Abstract: An active material for a battery has a surface treatment layer that includes a conductive agent and at least one coating-element-containing compound selected from the group consisting of a coating-element-containing hydroxide, a coating-element-containing oxyhydroxide, a coating-element-containing oxycarbonate, a coating-element-containing hydroxycarbonate, and a mixture thereof.

Abstract: A positive active material for a rechargeable lithium battery is provided. The active material includes a manganese-based compound selected from the group consisting of the compounds represented by the formulas 1 to 6. The surface of the active material is coated with metal oxide. LixMn1−xM′xA2  (1) LixMn1−xM′xO2−zAz  (2) LixMn1−x−yM′xM″yA2  (3) LixMn2−xM′xO4  (4) LixMn2−xM′xO4−zAz  (5) LixMn2−x−yM′xM″yA4  (6) (where, 0.01≦x≦0.1, 0.01≦y≦0.1, 0.01≦z≦0.5, M′ is at least one semi-metal selected from Si, B, Ti, Ga, Ge or Al, M″ is at least one transition metal or lanthanide metal selected from Al, Cr, Co, Mg, La, Ce, Sr or V, and A is selected from O, F, S or P.

Abstract: An electrochemical cell of either a primary or a secondary chemistry, is described. In either case, the cell has a negative electrode of lithium or of an anode material which is capable of intercalating and de-intercalating lithium coupled with a positive electrode of a cathode active material. A nitrite compound is mixed with either the anode material or the cathode active material prior to contact with its current collector. The resulting electrode couple is activated by a non-aqueous electrolyte. The electrolyte flows into and throughout the electrodes causing the nitrite compound to dissolve in the electrolyte. The nitrite solute is then able to contact the lithium to provide an electrically insulating and ionically conducting passivation layer thereon.

Abstract: A cathode composition for a lithium-ion battery having the formula Li[M1(1-x)Mnx]O2 where 0<x<1 and M1 represents one or more metal elements, with the proviso that M1 is a metal element other than chromium. The composition is in the form of a single phase having an O3 crystal structure that does not undergo a phase transformation to a spinel crystal structure when incorporated in a lithium-ion battery and cycled for 100 full charge-discharge cycles at 30° C. and a final capacity of 130 mAh/g using a discharge current of 30 mA/g.

Abstract: An electrochemical cell of either a primary or a secondary chemistry, is described. In either case, the cell has a negative electrode of lithium or of an anode material which is capable of intercalating and de-intercalating lithium coupled with a positive electrode of a cathode active material. A phosphate compound is mixed with either the anode material or the cathode active material prior to contact with its current collector. The resulting electrode couple is activated by a non-aqueous electrolyte. The electrolyte flows into and throughout the electrodes causing the phosphate compound to dissolve in the electrolyte. The phosphate solute is then able to contact the lithium to provide an electrically insulating and ionically conducting passivation layer thereon.

Abstract: The present invention provides an electrochemical cell of either a primary or a secondary chemistry housed in a casing having opposed major side walls of a contoured shape.

Abstract: The negative electrode or anode for a secondary electrochemical cell comprising a mixture of graphite or “hairy carbon” and a lithiated metal oxide, a lithiated mixed metal oxide or a lithiated metal sulfide, and preferably a lithiated metal vanadium oxide, is described. A most preferred formulation is graphite mixed with lithiated silver vanadium oxide or lithiated copper silver vanadium oxide.

Abstract: The present invention relates to metal oxides containing multiple dopants.

Abstract: An electrochemical cell comprises as an anode, a lithium transition metal oxide or sulphide compound which has a [B2]X4n− spinel-type framework structure of an A[B2]X4 spinel wherein A and B are metal cations selected from Li, Ti, V, Mn, Fe and Co, X is oxygen or sulphur, and n− refers to the overall charge of the structural unit [B2]X4 of the framework structure. The transition metal cation in the fully discharged state has a mean oxidation state greater than +3 for Ti, +3 for V, +3,5 for Mn, +2 for Fe and +2 for Co. The cell includes as a cathode, a lithium metal oxide or sulphide compound. An electrically insulative lithium containing liquid or polymeric electronically conductive electrolyte is provided between the anode and the cathode.

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 and equal to or less than about 1.3.

Abstract: A crystal which can be employed as the active material of a lithium-based battery has an empirical formula of Lix1A2Ni1−y−zCoyBzOa, wherein “x1” is greater than about 0.1 and equal to or less than about 1.3, “x2,” “y” and “z” each is greater than about 0.0 and equal to or less than about 0.2, “a” is greater than about 1.5 and less than about 2.1, “A” is at least one element selected from the group consisting of barium, magnesium, calcium and strontium and “B” is at least one element selected from the group consisting of boron, aluminum, gallium, manganese, titanium, vanadium and zirconium.

Abstract: A rechargeable, thin film lithium battery cell (10) is provided having an aluminum cathode current collector (11) having a transition metal sandwiched between two crystallized cathodes (12). Each cathode has an electrolyte (13) deposited thereon which is overlaid with a lithium anode (14). An anode current collector (16) contacts the anode and substantially encases the cathode collector, cathode, electrolyte and anode. An insulator (18) occupies the spaces between the components and the anode current collector.

Abstract: An electrochemical storage device includes a pair of electrodes, a separator present between the pair of electrodes, and an electrolyte solution with which the electrodes and the separator are impregnated. The electrodes are obtained by allowing at least one selected from a transition metal nitrate compound and a solution of the transition metal nitrate compound to be adsorbed on a carbon-based material and performing an additional treatment so that at least one of a transition metal oxide and a transition metal hydroxide is supported on the carbon-based material. Thus, an electrode material containing a reduced amount of halogenated ions mixed on which a transition metal oxide or a transition metal hydroxide is supported efficiently can be produced, and an electrochemical storage device having a high capacitance and a long life and a method for producing the same can be provided.

Abstract: The present invention relates to lithium manganese complex oxide with a spinel structure used as an active material of a lithium or lithium ion secondary battery. Specifically, the present invention relates to a process for preparing lithium manganese complex oxide having improved cyclic performance at a high temperature above room temperature, and a lithium or lithium ion secondary battery using the oxide prepared according to said process as a cathode active material.

Abstract: A method for producing electrode sheets for electrochemical elements which contain at least one lithium-intercalating electrode which is composed of a mixture of at least two copolymerized fluorized polymers in whose polymer matrix electrochemically active materials which are insoluble in the polymer are finely dispersed, the fluorized polymers are, having being dissolved as a solvent, mixed with electrochemically active materials, the resulting pasty substance is extruded to form a sheet and then laminated with a polyolefin separator, which is provided with a mixture of the two polymers, PVDF-HFP copolymers in each case being used as the polymer, and the proportion of HFP being less than about 8 percent by weight.

Abstract: The present invention discloses an improved lithium battery comprising a positive electrode, a negative electrode and a separator, and a manufacturing method of the same. The positive and negative electrodes comprise an active compounds selected from the group consisting of a compound being capable of reacting reversibly with a lithium ion, a compound having a structure that products of reacting a lithium ion with an electrolyte salt or an electolyte solvent are capable of deposition or precipitation, or a compound having a structure that a lithium ion can be intercalated, an additive comprising a fiber of micron scale having an electron conductivity, a collector comprising metal or carbon material, and an adhesive. The lithium ion secondary battery prepared from the above described electrode has a low interal resistance, a high capacity and a high-speed recharging-discharging capability.

Abstract: A lithium secondary battery using lithium manganese oxide as a positive active material and having excellent charge and discharge cycle properties.

Abstract: The present invention provides a positive electrode active material containing a composite oxide having a composition represented by a structural formula (1) given below:

Abstract: In a nonaqueous electrolytic secondary battery according to the invention, hexagonal system lithium containing cobalt composite oxide having a crystallite size in a (110) vector direction of 1000 Å or more and having a halogen compound added thereto by burning at time of synthesis is used as a positive electrode active material. By measuring a pH value of a filtrate obtained by dispersing, in water, the lithium containing cobalt composite oxide having the halogen compound added thereto by the burning at time of the synthesis and a crystallite size in the (110) vector direction of 1000 Å or more, a value of 9.6 to 10.1 is obtained. By using the lithium containing cobalt composite oxide as a positive electrode active material, a high temperature cycle property can be enhanced.

Abstract: This invention provides alkali ion conducting polymer electrolytes with high ionic conductivity and elastomeric properties suitable for use in high energy batteries. The polymer electrolytes are cyclic carbonate-containing polysiloxanes that can be modified with a cross linker or chain extender, and an alkali metal ion-containing material dissolved in the carbonate-containing polysiloxane. The cyclic carbonate-containing polysiloxanes may be prepared by reacting derivatized polysiloxanes with chain extending and/or crosslinking agents. The invention also provides batteries prepared by contacting an alkali metal anode with an alkali metal intercalating cathode and an alkali ion-conducting polymer electrolyte. As one example, polymers prepared from poly {3[2,3-(carbonyldioxy)propoxy]propyl]methyl siloxane, a polysiloxane with cyclic carbonate side chains, have shown promising results for battery applications.

Abstract: Positive electrode-active materials for use in lithium-ion and lithium-ion polymer batteries contain quaternary composite oxides of manganese, nickel, cobalt and aluminum where one of the four is present at levels of over 70 mol percent. The composite oxides can be lithiated to form positive electrode-active materials that are stable over at least ten charge/discharge cycles at voltage levels over 4.8 volts, and have capacities of over 200 mAh/g. Methods for producing the materials and electrochemical cells and batteries that include the materials are also provided.

Abstract: A wet-chemical method of fabricating electrode foils for galvanic elements including dissolving at least two different fluorinated polymers in a solvent, mixing a highly conductive carbon black, whose BET surface area is between that of surface-minimized graphite and activated carbon and an electrochemically active material having a two-dimensional layer structure and an electronic conductivity of at least about 10−4 S/cm into which lithium can be reversibly incorporated and be reversibly removed therefrom with the least two polymers dissolved in the solvent, without additions of plasticizers, swelling agents or electrolyte, applying paste composition thus obtained to an electrode collector or a support foil, and drying the paste composition.

Abstract: An alkali metal secondary electrochemical cell, and preferably a lithium ion cell, provided with a removable gas relief valve, is described. The gas release valve is positioned on the casing, in fluid flow communication between the inside thereof and the exterior. This gas release valve serves to eliminate cell gases that build up inside the casing during the cell's formation stage. Once the lithium-ion cell has completed formation, the gas release valve is removed and replaced with a hermetic closure. Removal of the gas release valve and sealing of the cell takes place in an environment in which no outside gas is capable of being introduced inside the casing. The cell can also be provided in a tank filled with inert gas and a filter which separates the cell gas from the inert gas. When cell formation is completed, the cell hermetically sealed.

Abstract: The present invention provides a secondary electrochemical cell comprising a body of aprotic, non-aqueous electrolyte, first and second electrodes in effective electrochemical contact with the electrolyte, the first electrode comprising active materials such as a lithiated intercalation compound serving as the positive electrode or cathode and the second electrode comprising a carbon-carbon composite material and serving as the negative electrode or anode; whereby they provide a secondary non-aqueous electrochemical cell having improved cycle life and shelf-life characteristics as compared with similar secondary non-aqueous electrochemical cells having carbon anodes that are not carbon-carbon composite.

Abstract: The present invention provides a new organic-inorganic (PDMcT+PANI)/V2O5 composites electrode material in which two different organic polymers are intercalated into the V2O5 interlayer, which shows higher discharge capacity than each isolated polymers and V2O5. Therefore, it can be used as a cathode in secondary lithium battery.

Abstract: A non-aqueous rechargeable battery for a vehicle contains a positive electrode, which has a positive electrode active material having a capacity of 120 mAh/g or larger; and a negative electrode, which has a negative electrode active material having a capacity of 280 mAh/g or larger and a reversible rate of the capacity of 80% or more, wherein a ratio of a positive electrode capacity to a negative electrode capacity is set to 0.6 to 0.9. The non-aqueous rechargeable battery has a light weight and a high energy density.

Abstract: The present invention provides a non-aqueous electrolyte secondary cell including: a lithium-nickel composite oxide as a cathode active material and a material having a specific surface in the range from 0.05 m2/g to 2 m2/g as an anode active material. When A is assumed to be the weight of the lithium-nickel composite oxide and B is assumed to be the weight of the cathode active material other than the lithium-nickel composite oxide, the mixture ratio R expressed A/(A+B) is in the range from 0.2 to 1. This combination of the cathode active material and the anode active material enables to obtain an improved anti-over discharge characteristic even when an anode current collector contains Cu.

Abstract: A positive active material for a rechargeable lithium battery is provided. The positive active material includes a core having a lithiated compound and at least two surface-treatment layers on the core, and each of the two surface-treatment layers includes at least one coating element. Alternatively, the positive active material includes at least one surface-treatment layer on the core, wherein the surface treatment at least comprises at least two coating element-included oxides.

Abstract: Disclosed is active material for a positive electrode used in lithium secondary batteries of Formula 1 below and a method manufacturing the same, a surface of the active material being coated with metal oxide. The method includes the steps of producing a crystalline powder or a semi-crystalline powder of Formula 1; coating the crystalline powder or the semi-crystalline powder with metal alkoxide sol; and heat-treating the powder coated with the metal alkoxide sol.

Abstract: A nonaqueous electrolyte secondary battery comprises a cathode having a cathode active material capable of electrochemically doping/dedoping lithium, an anode having an anode active material capable of electrochemically doping/dedoping lithium and a nonaqueous electrolyte interposed between the cathode and the anode. The nonaqueous electrolyte includes at least one or more kinds of vinylene carbonate, methoxybenzene compounds or antioxidants. The nonaqueous electrolyte secondary battery has a good cyclic characteristic under any environment of low temperature, ambient temperature and high temperature.

Abstract: A non-aqueous electrolyte cell having improved cyclic characteristics at elevated temperatures. The non-aqueous electrolyte cell includes a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode contains, as a positive electrode active material, a lithium transition metal composite oxide represented by the general formula LiCoxAyBzO2 where A denotes at least one selected from the group consisting of Al, Cr, V, Mn and Fe, B denotes at least one selected from the group consisting of Mg and Ca and x, y and z are such that 0.9≦x<1, 0.001≦y≦0.05 and 0.001≦z≦0.05.

Abstract: A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one sulfate additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is selected from a silyl sulfate, tin sulfate or an organic sulfate.

Abstract: An electrochemical cell comprising an electrode assembly in which overlayed electrodes are wound together in a bi-directional fashion yielding a high energy density cell stack with low internal impedance is described. The overlayed electrodes are such that either a single cathode is paired with two anodes or a single anode is paired with two cathodes prior to winding of the cell stack assembly. For example, the electrode assembly is formed by overlapping the two anode electrodes on opposite sides of the cathode electrode across a midportion and then winding the electrode strips bi-directionally about the midportion.

Abstract: A rechargeable lithium battery includes a negative electrode material having a total irreversible capacity of 45% or less of a total capacity of a positive electrode material. By adjusting the irreversible capacity of the negative electrode material in a wide range, a crystalline structure of the positive electrode material during charge-discharge is stably maintained, and cyclic resistance of the rechargeable lithium battery is improved. Moreover, the rechargeable lithium battery having a large capacity and high cyclic resistance at high temperature can be provided by the use of Li deficient type lithium manganese oxide of a layer structure as a positive electrode material.

Abstract: Disclosed is a non-aqueous electrolyte secondary battery having an excellent preservation characteristic at a high temperature and charging/discharging cycle characteristic.

Abstract: A nonaqueous-electrolyte secondary battery including a coil electrode formed by laminating an elongated positive electrode having a positive-electrode-mix layer formed on at least either of main surfaces of a positive-electrode collector and an elongated negative electrode having a negative-electrode-mix layer formed on at least either main surfaces of a negative-electrode collector and by winding a laminate such that the positive electrode is positioned at the outermost position, wherein the positive-electrode-mix layer is formed on only either of main surfaces of the collector at the position adjacent to the outermost end of the positive electrode and/or the position adjacent to the innermost end of the positive electrode, the positive-electrode-mix layer is not formed on the positive-electrode collector at the outermost end of the positive electrode and only the positive-electrode collector is formed, the negative-electrode-mix layer is not formed on the negative-electrode collector at the outermost end of

Abstract: The present invention improves the performance of lithium electrochemical cells by providing a new electrode assembly based on a sandwich cathode design, but termed a double screen sandwich cathode electrode design. In particular, the present invention uses sandwich cathode electrodes which are, in turn, sandwiched between two half double screen sandwich cathode electrodes, either in a prismatic plate or serpentine-like electrode assembly. In a jellyroll electrode assembly, the cell is provided in a case-positive design and the outside round of the electrode assembly is a half double screen sandwich cathode electrode.

Abstract: The invention relates to lithium mixed oxide particles coated with one or more layers of alkali metals and metal oxides for improving the properties of electrochemical cells.

Abstract: Improved lithium vanadium oxide formulations are presented having a nominal formula of LixV3−&dgr;M&dgr;Oy. Herein preferred cation doped vanadium oxide materials, electrodes using such materials, and electrochemical cells including at least one electrode therein comprising such materials are provided.