Abstract: To provide an electric storage device that has excellent charging characteristics, particularly at a low temperature. Provided is a nonaqueous solvent-based electric storage device containing as positive electrode active materials, at least one of a lithium nickel aluminum complex oxides and a spinel-type lithium manganese oxide active material having LiMn2O4 as a basic structure, and lithium vanadium phosphate.

Abstract: A positive-electrode material includes lithium vanadium phosphate particles having an average primary particle diameter from 0.3 ?m to 2.6 ?m and crystallite sizes from 24 nm to 33 nm. The lithium vanadium phosphate particles are coated with a conductive carbon of a range of 0.5 mass % to 2.4 mass % with respect to a total lithium vanadium phosphate particles.

Abstract: A process for producing a lithium vanadium phosphate-carbon composite includes a first step that includes mixing a lithium source, a tetravalent or pentavalent vanadium compound, a phosphorus source, and a conductive carbon material source that produces carbon through pyrolysis, in an aqueous solvent to prepare a raw material mixture, a second step that includes heating the raw material mixture to effect a precipitation reaction to obtain a reaction mixture that includes a precipitate, a third step that includes subjecting the reaction mixture that includes the precipitate to wet grinding using a media mill to obtain a slurry that includes ground particles, a fourth step that includes spray-drying the slurry that includes the ground particles to obtain a reaction precursor, and a fifth step that includes calcining the reaction precursor at 600 to 1300° C. in an inert gas atmosphere or a reducing atmosphere.

Abstract: In a non-aqueous electrolyte secondary battery, a positive electrode active material includes a carbon-coated lithium vanadium phosphate and a lithium nickel composite oxide. A negative electrode active material includes a carbon-based active material capable of intercalating and deintercalating lithium ions. When a first charge capacity of a negative electrode per unit area is “x” (mAh/cm2), and a first charge capacity of a positive electrode per unit area is “y” (mAh/cm2), a relation of “x” and “y” satisfies 0.6?y/x?0.92.

Abstract: A positive-electrode material includes lithium vanadium phosphate particles having an average primary particle diameter from 0.3 ?m to 2.6 ?m and crystallite sizes from 24 nm to 33 nm. The lithium vanadium phosphate particles are coated with a conductive carbon of a range of 0.5 mass % to 2.4 mass % with respect to a total lithium vanadium phosphate particles.

Abstract: In a non-aqueous electrolyte secondary battery, a first active material of a positive electrode includes at least one of carbon-coated LiFePO4, LiMnPO4 and Li3V2(PO4)3. A second active material of the positive electrode includes lithium nickel composite oxide. An electrolytic solution includes fluorinated ethylene carbonate.

Abstract: There is provided is a lithium ion secondary battery. The lithium ion secondary battery includes: a positive electrode having a positive electrode active material layer containing a positive electrode active material containing a vanadium-based compound; and a negative electrode having a negative electrode active material layer containing a negative electrode active material into which lithium ions can be inserted/deinserted reversibly. A vanadium-based compound is dispersed in the negative electrode active material layer. As a result, a vanadium-based compound, corresponding to the vanadium-based compound contained in the positive electrode active material is dispersed in the negative electrode active material layer.

Abstract: An electric storage device is provided with a positive electrode having a positive-electrode mixture layer including a positive-electrode active material. The positive-electrode active material includes a lithium-vanadium-phosphate from 8% to 70% by mass and a lithium-nickel complex oxide from 20% to 82% by mass. A coating concentration of the positive-electrode mixture layer is from 4 mg/cm2 to 20 mg/cm2. The lithium-nickel complex oxide includes a nickel element from 0.3 mol to 0.8 mol with respect to a lithium element of 1 mol.

Abstract: Provided are a positive electrode active material, a lithium ion electric storage device using the same, and a manufacturing method thereof. The positive electrode active material contains (1) lithium nickel cobalt manganese oxide, and at least one type of a lithium ion acceptance capacity adjustment compound selected from (2a) lithium vanadium composite oxide, vanadium oxide, lithium vanadium phosphate, and lithium vanadium fluorophosphate and (2b) Nb2O5, TiO2, Li3/4Ti5/3O4, WO2, MoO2, and Fe2O3. The lithium ion electric storage device contains this positive electrode active material.

Abstract: A positive electrode sheet including a positive electrode mixture layer formed on one surface is provided at one of the outermost layers of an electrode sheet group, while a positive electrode sheet including a positive electrode mixture layer formed at one surface is provided at the other outermost layer of the electrode sheet group. A negative electrode sheet including negative electrode mixture layers formed on both surfaces is provided between the positive electrode sheets. A lithium electrode sheet including metal lithium foils formed on both surfaces is overlapped onto the electrode sheet group formed by stacking the three sheets. When a wound-type electric storage device is produced, the electrode sheet group is wound together with the lithium electrode sheet.

Abstract: In an electric storage device, lithium electrodes are disposed on respective outermost portions of an electrode laminated unit in which a positive electrode and a negative electrode are laminated alternately via positive/negative electrode separators. The lithium electrode includes lithium metal serving as a lithium ion supply source, and a lithium electrode separator (a non-woven fabric separator) constituted by a non-woven fabric that satisfies the following conditions: (a) an average fiber diameter of 0.1 ?m to 10 ?m; and (b) a thickness of 5 ?m to 500 ?m is provided. By forming the lithium electrode separator that contacts the lithium electrode including the lithium ion supply source from a non-woven fabric in this manner, a dramatic improvement can be achieved in the cycle characteristic of the electric storage device.

Abstract: A positive electrode sheet including a positive electrode mixture layer formed on one surface is provided at one of the outermost layers of an electrode sheet group, while a positive electrode sheet including a positive electrode mixture layer formed at one surface is provided at the other outermost layer of the electrode sheet group. A negative electrode sheet including negative electrode mixture layers formed on both surfaces is provided between the positive electrode sheets. A lithium electrode sheet including metal lithium foils formed on both surfaces is overlapped onto the electrode sheet group formed by stacking the three sheets. When a wound-type electric storage device is produced, the electrode sheet group is wound together with the lithium electrode sheet.