Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte interposed between the positive electrode and the negative electrode. The positive electrode includes an active material capable of reversibly absorbing and desorbing lithium. The negative electrode includes an active material of the same composition as that of the active material of the positive electrode. This non-aqueous electrolyte secondary battery does not generate voltage until being charged. Also, in the case of reflow mounting, charging the battery after mounting will avoid having an adverse effect on the components mounted on the substrate.

Abstract: There is provided a lithium secondary battery having a high capacity and excellent high-rate discharge characteristic and charge/discharge cycle characteristic. The lithium secondary battery comprises a negative electrode, a positive electrode and an ionic conductor, wherein the positive electrode comprises lithium metal composite oxide particles; the lithium metal composite oxide particles comprise a plurality of secondary particles in an elongated shape each comprised of a plurality of primary particles with an average particle size of 0.1 to 1 ?m so aggregated as to form a void therebetween; and the secondary particle is columnar or planar and has an average size in a long length direction of 5 to 15 ?m.

Abstract: A cathode material for use in a lithium secondary battery of excellent thermal stability contributing to the improvement of safety of the battery and having large discharging capacity, as well as a method of manufacturing the cathode material for use in the lithium secondary battery, based on the improved method for measuring the thermal stability of the cathode material, the cathode material comprising a compound represented by the chemical formula: LixNiyCozMmO2 in which the material is powdery and the BET specific surface area is 0.8 m2/g or less, M in the chemical formula represents one or more of element selected from Ba, Sr and B, and x, y, z and m are, respectively, 0.9?x?1.1, 0.5?y?0.95, 0.05?z?0.5 and 0.0005?m?0.02.

Abstract: A battery with a high battery voltage at charging and improved energy density is provided. A cathode (12) and an anode (14) are laminated with a separator (15) sandwiched therebetween which is impregnated with an electrolyte. The cathode (12) has a cathode active material including a lithium composite oxide which contains lithium, at least either cobalt or nickel, and oxygen. The battery voltage at charging is 4.25 V or more. The total amount of lithium carbonate and lithium sulphate in the cathode (12) to the cathode active material is 1.0 wt % or less, a concentration of protic impurities in the electrolyte, which is converted to a mass ratio of protons to the electrolyte, is 20 ppm or less, or moisture content in the electrolyte is 20 ppm mass ratio or less to the electrolyte. This inhibits metal eluting from the lithium composite oxide even at high voltages.

Abstract: There is provided a lithium secondary battery having a high capacity and excellent high-rate discharge characteristic and charge/discharge cycle characteristic. The lithium secondary battery comprises a negative electrode, a positive electrode and an ionic conductor, wherein the positive electrode comprises lithium metal composite oxide particles; the lithium metal composite oxide particles comprise a plurality of secondary particles in an elongated shape each comprised of a plurality of primary particles with an average particle size of 0.1 to 1 ?m so aggregated as to form a void therebetween; and the secondary particle is columnar or planar and has an average size in a long length direction of 5 to 15 ?m.

Abstract: There is obtained a material of a positive electrode for a secondary lithium-ion cell having high cycle durability and high safety in high-voltage and high-capacity applications, which is a particulate positive electrode active material for a secondary lithium-ion cell represented by a general formula, LiaCObAcBdOeFf (A is Al or Mg, B is a group-IV transition element, 0.90?a?1.10, 0.97?b?1.00, 0.0001?c?0.03, 0.0001?d?0.03, 1.98?e?2.02, 0?f?0.02, and 0.0001?c+d?0.03), where element A, element B and fluorine are evenly present in the vicinity of the particle surfaces.

Abstract: An electrochemical cell comprises as an anode, a lithium transition metal oxide or sulphide compound which as a [B2]X4n- spinel-type framework structure of an A[B2]S4 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: Single-phase lithium-transition metal oxide compounds containing cobalt, manganese and nickel can be prepared by wet milling cobalt-, manganese-, nickel- and lithium-containing oxides or oxide precursors to form a finely-divided slurry containing well-distributed cobalt, manganese, nickel and lithium, and heating the slurry to provide a lithium-transition metal oxide compound containing cobalt, manganese and nickel and having a substantially single-phase O3 crystal structure. Wet milling provides significantly shorter milling times than dry milling and appears to promote formation of single-phase lithium-transition metal oxide compounds. The time savings in the wet milling step more than offsets the time that may be required to dry the slurry during the heating step.

Abstract: A secondary-battery current collector comprising an aluminum foil and a film containing an ion-permeable compound and carbon fine particles formed thereon or a secondary-battery current collector comprising an aluminum foil, a film containing an ion-permeable compound and carbon fine particles formed thereon as the lower layer, and a film containing a binder, carbon fine particles and a cathodic electroactive material formed thereon as the upper layer, a production method of the same, and a secondary battery having the current collector are provided.

Abstract: A battery is provided. The battery provides improved battery characteristics such as cycle characteristics. A battery includes a cathode; an anode; and an electrolytic solution, wherein the anode contains a carbon material, the electrolytic solution contains propylene carbonate and 4-fluoroethylene carbonate, and the content of 4-fluoroethylene carbonate is from about 0.0027 g to about 0.056 g per about 1 g of the carbon material.

Abstract: A positive electrode active material for a lithium secondary battery containing a lithium-cobalt composite oxide, which has a large volume capacity density, has a high safety and is excellent in charge and discharge cyclic durability, and its production process, are provided. A lithium-cobalt composite oxide represented by the formula LipCoxMyOzFa (wherein M is a transition metal element other than Co or an alkaline earth metal element, 0.9?p?1.1, 0.980?x?1.000, 0?y?0.02, 1.9?z?2.1, x+y=1 and 0?a?0.

Abstract: The present invention provides a non-aqueous electrolyte-based high power lithium secondary battery having a long-term service life and superior safety at both room temperature and high temperature, even after repeated high-current charging and discharging, wherein the battery comprises a mixture of a particular lithium manganese-metal composite oxide (A) having a spinel structure and a particular lithium nickel-manganese-cobalt composite oxide (B) having a layered structure, as a cathode active material.

Abstract: As a positive electrode active material, a lithium transition metal complex oxide having a layered rock-salt structure containing lithium (Li) and containing magnesium atoms (Mg) substituted for part of lithium atoms (Li) is used. The lithium transition metal complex oxide is formed by chemical or electrochemical substitution of Mg atoms for part of Li atoms in LiCoO2, LiMnO2, LiFeO2, LiNiO2, or the like. A cell is prepared in which a negative electrode 2 and a positive electrode 1 including the lithium transition metal complex oxide (positive electrode active material) are disposed in a non-aqueous electrolyte 5 including a lithium salt, and part of Li in the lithium transition metal complex oxide is extracted by discharging the cell. Then, the electrolyte including Li is replaced with an electrolyte including Mg, and the cell is discharged, so that Mg atoms are substituted for the part of Li atoms in the lithium transition metal complex oxide.

Abstract: A lithium metal oxide positive electrode for a non-aqueous lithium cell is disclosed. The cell is prepared in its initial discharged state and has a general formula xLiMO2.(1?x)Li2M?O3 in which 0<x<1, and where M is one or more ion with an average trivalent oxidation state and with at least one ion being Mn or Ni, and where M? is one or more ion with an average tetravalent oxidation state. Complete cells or batteries are disclosed with anode, cathode and electrolyte as are batteries of several cells connected in parallel or series or both.

Abstract: A nonaqueous electrolyte secondary battery wherein a material capable of occluding/discharging lithium is used as a negative electrode material and a lithium-transition metal composite oxide which contains Ni and Mn as the transition metal and has a layered structure is used as a positive electrode material is characterized in that a lithium-transition metal composite oxide having a BET specific surface area less than 3 m2/g and a pH of 11.0 or less when 5 g of the lithium-transition metal composite oxide is immersed in 50 ml of purified water is used as the positive electrode active material.

Abstract: In a non-aqueous electrolyte secondary battery using a layered lithium-transition metal composite oxide as a positive electrode active material, elevated-temperature durability, that is, elevated-temperature storage performance is enhanced without degrading battery capacity. The non-aqueous electrolyte secondary battery includes: a positive electrode including, as a positive electrode active material, layered lithium-transition metal composite oxide containing lithium, nickel, and manganese; a negative electrode active material capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte having lithium ion conductivity, and the lithium-transition metal composite oxide contains a group IVA element and a group IIA element of the periodic table.

Abstract: A cathode with a cathode active material is provided. The cathode active material is obtained by mixing a zirconium-containing lithium cobalt composite oxide containing zirconium as a sub-component element in a first lithium cobalt composite oxide expressed by a formula LitCoMsO2 (where M is at least one kind of element selected from Fe, V, Cr, Ti, Mg, Al, B, and Ca; 0?s?0.03; 0.05?t?1.15), and a second lithium cobalt composite oxide expressed by a formula LixCol-yAyO2 (where A is at least one kind of element selected from Mg and Al; 0.05?x?1.15; 0?y?0.03).

Abstract: A non-aqueous electrolyte secondary battery has a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte solution. The positive electrode has a theoretical capacity per unit area from 3.0 to 4.5 mAh/cm2. The non-aqueous electrolyte solution contains ethylene carbonate (EC), ethylmethyl carbonate (EMC), and dimethyl carbonate (DMC) as solvents, and LiPF6 as an electrolyte, with volume ratios from 10 to 20% for EC, 10 to 20% for EMC, and 60 to 80% for DMC relative to all the solvents in the electrolyte solution. The concentration of the LiPF6 is from 1.30 to 1.50 mol/L.

Abstract: The invention provides a non-aqueous electrolyte secondary cell that has high capacity and excels in cycle characteristics. The non-aqueous electrolyte secondary cell functions stably at a high potential of from 4.4 to 4.6 V with respect to lithium and inhibits the decomposition of the electrolytic solution at high potential. This is accomplished as follows. The non-aqueous electrolyte secondary cell has a positive electrode having a positive electrode active material; a negative electrode having a negative electrode active material; and a non-aqueous electrolyte having a non-aqueous solvent and electrolytic salt. The positive electrode active material has: lithium cobalt compound oxide having added therein at least zirconium and magnesium; and lithium-nickel-manganese compound oxide having a layered structure. The positive electrode active material has a potential of from 4.4 to 4.6 V with respect to lithium. The non-aqueous solvent contains diethyl carbonate of 10 vol. % or higher at 25° C.

Abstract: A nonaqueous electrolyte secondary battery comprising a positive electrode containing a positive active material, a negative electrode containing a negative active material and a nonaqueous electrolyte, wherein a lithium transition metal complex oxide A formed by allowing LiCoO2 to contain at least both of Zr and Mg and a lithium transition metal complex oxide B having a layered structure and containing at least both of Mn and Ni as transition metals and containing molybdenum (Mo) are mixed and used as said positive active material.

Abstract: Coagulated particles of nickel-cobalt-manganese hydroxide wherein primary particles are coagulated to form secondary particles are synthesized by allowing an aqueous solution of a nickel-cobalt-manganese salt, an aqueous solution of an alkali-metal hydroxide, and an ammonium-ion donor to react under specific conditions; and a lithium-nickel-cobalt-manganese-containing composite oxide represented by a general formula, LipNixMn1-x-yCoyO2-qFq (where 0.98?p?1.07, 0.3?x?0.5, 0.1?y?0.38, and 0?q?0.05), which is a positive electrode active material for a lithium secondary cell having a wide usable voltage range, a charge-discharge cycle durability, a high capacity and high safety, is obtained by dry-blending coagulated particles of nickel-cobalt-manganese composite oxyhydroxide formed by making an oxidant to act on the coagulated particles with a lithium salt, and firing the mixture in an oxygen-containing atmosphere.

Abstract: A battery unit has a plurality of non-aqueous electrolyte secondary batteries connected in series, wherein at least two types of non-aqueous electrolyte secondary batteries (A1), (B1a) having different potentials at which lithium is released from the positive electrode active material and at which the electrical resistance in the battery increases during charge are connected in series.

Abstract: In a positive electrode of a non-aqueous electrolyte battery, at least one alkaline earth metal oxide selected from the group consisting of magnesium oxide, calcium oxide and barium oxide is dispersed between particles of an active substance for positive electrode, whereby a discharge capacity or recharge-discharge capacity of the non-aqueous electrolyte battery just after the preparation and after the storing at high temperature is improved.

Abstract: There is provided a simple and easy method of preparation of a positive electrode active material for a non-aqueous secondary battery which comprises a compound comprising lithium, nickel and manganese and having a layered structure. Said method comprises firing a mixture of (1) at least one member selected from the group consisting of dinickel trioxide and boron compounds and (2) one or more metal compounds comprising lithium, nickel and manganese as their metal elements.

Abstract: To provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which can achieve high capacity and high output simultaneously, and a non-aqueous electrolyte secondary battery using the same. A non-aqueous electrolyte secondary battery is obtained by using as a positive electrode, a positive electrode active material for a non-aqueous electrolyte secondary battery, which is expressed by the general formula: Lix(Ni1-yCoy)1-zMzO2 (0.98?x?1.10, 0.05?y?0.4, 0.01?z?0.2, M=at least one element selected from the group of Al, Zn, Ti and Mg), and which has a Li site occupancy of the Li site in crystal of 98.5% or more, and a metal site occupancy of the metal site of from 95% to 98% inclusive, obtained by Rietveld analysis.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery includes a particle of a composite oxide which contains Li and Co, wherein: the composite oxide further contains an element M1 and an element M2; the element M1 is at least one selected from the group consisting of Mg, Cu and Zn; the element M2 is at least one selected from the group consisting of Al, Ca, Ba, Sr, Y and Zr; the element M1 is uniformly distributed in the particle; and the element M2 is distributed in the surface portion of the particle more than in the inside thereof.

Abstract: In a nonaqueous electrolyte secondary battery 10 containing a positive electrode 11 having a positive electrode active material capable of intercalating and deintercalating lithium ion; a negative electrode 12 having a negative electrode active material capable of intercalating and deintercalating lithium ion; and a nonaqueous electrolyte, the positive electrode active material contains both lithium cobalt oxide A in which 3 to 5 mol % of magnesium are homogeneously added and lithium cobalt oxide B in which 0.1 to 1 mol % of magnesium is homogeneously added which are mixed in a mixing ratio of lithium cobalt oxide A: lithium cobalt oxide B=2:8 to 8:2. By constituting a nonaqueous electrolyte secondary battery having the above constitution, a nonaqueous electrolyte secondary battery in which the thermal stability and the higher temperature cycle property are remarkably improved without lowering the battery capacity and the load performance.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode contains an active material providing a working potential which is nobler by at least 0.5V than a lithium metal potential. Also, the nonaqueous electrolyte contains an ionic liquid and allyl phosphate represented by chemical formula given below: where R denotes hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and n denotes an integer of 1 to 3.

Abstract: The invention provides a battery which can improve cycle characteristics by forming a more stable and stronger film on the surface of an anode active material layer. A cathode and an anode are layered with a separator in between. The anode has an anode collector and the anode active material layer. The anode active material layer contains Si, Sn, or an alloy thereof, and formed by vapor-phase method, liquid phase method, or sinter method. It is preferable that the anode active material layer is alloyed with the anode collector on at least a part of interface between the anode active material layer and the anode collector. The separator is impregnated with an electrolyte solution. The electrolyte solution contains cyclic carbonic ester having saturated bonds such as vinylene carbonate and vinylethylene carbonate as a solvent. Consequently, a strong and stable film is formed on the surface of the anode active material layer, and decomposition of the electrolyte solution in the anode is inhibited.

Abstract: A lithium secondary cell includes a plurality of stacked layers. Each stacked layer includes a lithium-containing positive electrode in electronic contact with a positive electrode current collector, a negative electrode in electronic contact with a negative electrode current collector, a separator positioned between the positive electrode and the negative electrode, and an electrolyte in ionic contact with the positive and negative electrodes. The positive current collector is in electrical connection with an external circuit and has a total thickness of at least about 200 ?m. The negative current collector is in electrical connection with an external circuit. The total cell polarization during a failure event reduces the rate of discharge such that catastrophic failure does not occur. Thus, the lithium secondary cell exhibits safer failure modes than conventional cells known in the art.

Abstract: A positive electrode active material, which gives a non-aqueous electrolyte secondary battery capable of high input/output where resistance due to a battery reaction in a low temperature environment is suppressed, is produced by a method comprising: (a)providing a nickel hydroxide which is represented by the general formula Ni1?(x+y)CoxMy(OH)2, (b)heating the nickel hydroxide at a temperature not lower than 600° C. and not higher than 1000° C. to produce a nickel oxide which is represented by the general formula Ni1?(x+y)CoxMyO; and (c)mixing the nickel oxide and a lithium compound to obtain a mixture and heating the mixture at a temperature not lower than 700° C. and not higher than 850° C. to produce a lithium-containing composite oxide which is represented by the general formula LiNi1?(x+y)CoxMyO2, where 0.1?x?0.35 and 0.03?y?0.2 are satisfied and M is at least one selected from the group consisting of Al, Ti and Sn.

Abstract: A battery cathode including a current collector and a cathode material coated on and/or filled in the current collector, said cathode material including a cathode active substance, a conductive additive and an adhesive, wherein said cathode material is coated with a layer of lithium cobaltate on the surface thereof and the content of lithium cobaltate is 0.1-15 wt % (weight percent) based on the weight of the cathode active substance. The lithium ion battery using the cathode provided by the present invention has a higher specific capacity and improved cycling performance.

Abstract: The invention provides a non-aqueous electrolyte battery characterized in that: an active material of the positive electrode includes lithium manganese oxide; the shut-down temperature of the separator is 162° C. or lower; and the area contraction ratio of the separator at 120° C. is 15% or less.

Abstract: A high capacity, high charge rate lithium secondary cell includes a high capacity lithium-containing positive electrode in electronic contact with a positive electrode current collector, said current collector in electrical connection with an external circuit, a high capacity negative electrode in electronic contact with a negative electrode current collector, said current collector in electrical connection with an external circuit, a separator positioned between and in ionic contact with the cathode and the anode, and an electrolyte in ionic contact with the positive and negative electrodes, wherein the total area specific impedance for the cell and the relative area specific impedances for the positive and negative electrodes are such that, during charging at greater than or equal to 4C, the negative electrode potential is above the potential of metallic lithium.

Abstract: Provided are a cathode active material for a non-aqueous electrolyte secondary battery with high operating voltage, high volume capacity density, high safety and excellent charge and discharge cyclic properties, and its production method. The cathode active material for a non-aqueous electrolyte secondary battery, which comprises a lithium-containing composite oxide powder, which is represented by the formula LipNxMyOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than the element N, 0.9?p?1.1, 0.965?x<1.00, 0<y?0.035, 1.9?z?2.1, x+y=1 and 0?a?0.02), a surface layer of which contains zirconium, and the surface layer within 5 nm of which has an atomic ratio (zirconium/the element N) of at least 1.0.

Abstract: The present invention relates to Lithium Metal batteries. In particular, it is related to lithium metal batteries containing a polyimide-based electrolyte. The present invention concerns a new concept of polyimide-based electrolytic component having an electrolyte consisting of at least one solvent and at least one alkali metal salt, with specific amounts of solvents, to optimize the properties of conductivity of the polyimide-based electrolyte and the mechanical properties of the polyimide-based electrolyte separator towards metallic lithium anode to prevent dendrites growths.

Abstract: Cathode active materials for lithium batteries are provided. In one embodiment, the cathode active material is a lithium complex material represented by the following Formula: yLi[Li1/3Me2/3]O2-(1-y)LiMe?O2. In the formula, 0<y?0.8, Me is a metal group having an oxidation number of +4 and includes a transition metal selected from Mo, W, V, Ti, Zr, Ru, Rh, Pd, Os, Ir, Pt and combinations thereof, and Me? includes a transition metal selected from Ni, Mn, Co and combinations thereof. Lithium batteries employing the cathode active materials are also provided and exhibit improved energy density and high-rate capabilities of an electrode.

Abstract: A polymer electrolyte extends the cycle life, improves the safety, and reduces the swelling of a battery, compared with a polymer electrolyte containing a poly(alkylene oxide) polymer. Also, a lithium battery utilizes the polymer electrolyte. The polymer electrolyte contains a polymerized product from a polymer electrolyte forming composition containing a multifunctional isocyanurate monomer of a particular structure, a lithium salt, and a non-aqueous organic solvent.

Abstract: A cathode active material has: a composite oxide particle containing at least lithium Li and cobalt Co; and a coating layer provided in a part of the composite oxide particle and having an oxide containing Li and an element of one of nickel Ni, manganese Mn, and cobalt Co. A ratio [Ni(T)Co(S)/Ni(S)Co(T)] of an atomic ratio [Ni(T)/Co(T)] of Ni to Co as an average of the whole cathode active material to an atomic ratio [Ni(S)/Co(S)] of Ni to Co in the surface of the cathode active material is larger than a ratio [Mn(T)Co(S)/Mn(S)Co(T)] of an atomic ratio [Mn(T)/Co(T)] of Mn to Co as an average of the whole cathode active material to an atomic ratio [Mn(S)/Co(S)] of Mn to Co in the surface of the cathode active material.

Abstract: Coagulated particles of nickel-cobalt-manganese hydroxide wherein primary particles are coagulated to form secondary particles are synthesized by allowing an aqueous solution of a nickel-cobalt-manganese salt, an aqueous solution of an alkali-metal hydroxide, and an ammonium-ion donor to react under specific conditions; and a lithium-nickel-cobalt-manganese-containing composite oxide represented by a general formula, LipNixMn1-x-yCoyO2-qFq (where 0.98?p?1.07, 0.3?x?0.5, 0.1?y?0.38, and 0?q?0.05), which is a positive electrode active material for a lithium secondary cell having a wide usable voltage range, a charge-discharge cycle durability, a high capacity and high safety, is obtained by dry-blending coagulated particles of nickel-cobalt-manganese composite oxyhydroxide formed by making an oxidant to act on the coagulated particles with a lithium salt, and firing the mixture in an oxygen-containing atmosphere.

Abstract: A positive electrode used in the non-aqueous electrolyte secondary battery of the present invention includes a hexagonal system lithium-containing cobalt composite oxide represented by the general expression ?LiCo1-XMXO2 (M=Zr, Mg, Al)? obtained by synthesizing a lithium compound as a lithium source with a cobalt compound as a cobalt source to which 0.01 mol % or more and 1.0 mol % or less of zirconium is added and magnesium and/or aluminum is added through coprecipitation, as the positive electrode active material, whereby the thermal stability, load performance and charging/discharging cycle performance characteristics of the non-aqueous electrolyte secondary battery are improved without lowering its capacity and charging/discharging efficiency.

Abstract: To provide a lithium-nickel-cobalt-manganese composite oxide powder for a positive electrode of a lithium secondary battery, which has a large volume capacity density and high safety and is excellent in the charge and discharge cyclic durability. A positive electrode active material powder for a lithium secondary battery characterized by comprising a first granular powder having a compression breaking strength of at least 50 MPa and a second granular powder having a compression breaking strength of less than 40 MPa, formed by agglomeration of many fine particles of a lithium composite oxide represented by the formula LipNixCoyMnzMqO2-aFa (wherein M is a transition metal element other than Ni, Co and Mn, Al or an alkaline earth metal element, 0.9?p?1.1, 0.2?x?0.8, 0?y?0.4, 0?z?0.5, y+z>0, 0?q?0.05, 1.9?2?a?2.1, x+y+z+q=1 and 0?a?0.02) to have an average particle size D50 of from 3 to 15 ?m, in a weight ratio of the first granular powder/the second granular powder being from 50/50 to 90/10.

Abstract: A composition having a formula LixMgyNiO2 wherein 0.9<x<1.3, 0.01<y<0.1, and 0.91<x+y<1.3 can be utilized as cathode materials in electrochemical cells. A composition having a core, having a formula LixMgyNiO2 wherein 0.9<x<1.3, 0.01<y<0.1, and 0.9<x+y<1.3, and a coating on the core, having a formula LiaCobO2 wherein 0.7<a<1.3, and 0.9<b<1.2, can also be utilized as cathode materials in electrochemical cells.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery, comprising a lithium-containing composite oxide, wherein the composite oxide is represented by the general formula: LizCo1-x-yMgxMyO2, the element M included in the general formula is at least one selected from the group consisting of Al, Ti, Sr, Mn, Ni and Ca, the values x, y and z included in the general formula satisfy: (i) 0?z?1.03; (ii) 0.005?x?0.1; and (iii) 0.001?y?0.03, the composite oxide has a crystal structure attributed to a hexagonal system in an overcharged state having a potential over 4.25 V relative to metallic Li, and a maximum value of an oxygen generation peak in a gas chromatograph mass spectrometry measurement of the composite oxide in the overcharged state is in the range of 330 to 370° C.

Abstract: Storage performance in a charged state is improved with a non-aqueous electrolyte secondary battery using gamma-butyrolactone as a solvent. A non-aqueous electrolyte secondary battery includes a positive electrode (2) containing a positive electrode active material including a lithium-containing transition metal oxide; a negative electrode (1) containing a negative electrode active material capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte including a solute and a solvent; wherein the solvent contains 50 volume % or more of gamma-butyrolactone with respect to the total volume of the solvent, and the positive electrode active material contains a phosphate salt M1PO4, where M1 is a metal element capable of having a valency of 3.

Abstract: The present invention provides: an electrode material for a lithium secondary battery containing lithium boron mixed oxide having a monoclinic LiBO2 structure and represented by a chemical formula LiB1-xDxO2-yEy (wherein, D represents a substitution element of boron B, E represents a substitution element of oxygen O, 0<x<0.5, and 0?y<0.1); an electrode structure employing the electrode material; and a lithium secondary battery having the electrode structure. Accordingly, the present invention provides: an electrode material for a lithium secondary battery having a voltage of 3.0 V (vs. Li/Li+) or more, a usable capacity exceeding 200 mAh/g, and a high energy density; an electrode structure employing the electrode material; and a lithium second battery having the electrode structure.

Abstract: The present invention aims to provide a non-aqueous electrolyte secondary cell having high capacity and capable of preventing elution of cobalt and decomposition of the electrolyte. This aim can be accomplished by providing a non-aqueous electrolyte secondary cell comprising a positive electrode having a positive electrode active material, an negative electrode having an negative electrode active material, and non-aqueous electrolyte, wherein the positive electrode active material comprises lithium cobalt oxide to which at least one material selected from the group consisting of Mg, Al, Ti, and Zr was added, and the positive electrode comprises lithium phosphate.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode that contains a lithium composite oxide as an active material. The cut-off voltage of charge is set to 4.25 to 4.5 V. In a region where the positive electrode and the negative electrode face each other, the Wp/Wn ratio R is in the range from 1.3 to 19 where Wp is the weight of the active material contained in the positive electrode per unit area and Wn is the weight of the active material contained in the negative electrode per unit area. This battery is excellent in safety, cycle characteristics, and storage characteristics even when the cut-off voltage of charge in a normal operating condition is set to 4.25 V or more.

Abstract: The present invention relates to a method of chemically modifying a lithium-based oxide comprising at least one transition metal, which comprises, in succession: a step of bringing said oxide into contact with an aqueous solution comprising phosphate ions; a step of separating said oxide from the aqueous solution; and a step of drying said oxide. Use of the modified lithium transition metal oxide as active positive electrode material for a lithium secondary battery.

Abstract: Methods of manufacture and use of phosphates of transition metals are described as positive electrodes for secondary lithium batteries, including a process for the production of LiMPO4 with controlled size and morphology, M being FexCoyNizMnw, where 0?x?1,0?y?1, 0?w?1, and x+y+z+w=1. According to an exemplary embodiment, a process is described for the manufacture of LiFePO4 including the steps of providing an equimolar aqueous solution of Li1+, Fe3+ and PO43?, evaporating water from the solution to produce a solid mixture, decomposing the solid mixture at a temperature of below 500° C. to form a pure homogeneous Li and Fe phosphate precursor, and annealing the precursor at a temperature of less than 800° C. in a reducing atmosphere to produce the LiFePO4 powder. The obtained powders can have a particle size of less than 1 ?m, and can provide superior electrochemical performance when mixed for an appropriate time with an electrically conductive powder.