Abstract: A main object of the present invention is to provide a secondary battery whose performance can be improved. The secondary battery includes a cathode, an anode, and an electrolyte layer arranged between the cathode and the anode, wherein the electrolyte layer includes a cathode side electrolyte layer arranged on a cathode side and an anode side electrolyte layer arranged between the cathode side electrolyte layer and the anode, the cathode side electrolyte layer includes an electrolyte and a binder including a fluorine-based copolymer including tetrafluoroethylene, and the anode side electrolyte layer includes a butadiene-rubber-based binder and an electrolyte.

Abstract: A positive electrode for a lithium secondary battery provided by the present invention includes a positive electrode active material layer having a particulate positive electrode active material constituted by a composite oxide containing lithium and at least one type of transition metal element, and at least one type of binding material constituted by a polymer compound having at least one functional group, and a conductive carbonaceous coating film is formed on a surface of the positive electrode active material. Further, the polymer compound constituting the binding material is molecularly bound to carbon atoms constituting the carbonaceous coating film of at least a part of the positive electrode active material, whereby a composite compound is formed from the polymer compound molecularly bound to the carbon atoms and a carbon network constituting the carbonaceous coating film containing the carbon atoms.

Abstract: An all-solid-state battery system includes: an all-solid-state battery; a light detection unit; and a control unit. The all-solid-state battery includes a battery element having a positive electrode layer, a negative electrode layer and a solid electrolyte layer. The light detection unit detects light emitted from at least one of the positive electrode layer and the negative electrode layer. The control unit controls charge of the all-solid-state battery on the basis of intensity of light detected by the light detection unit.

Abstract: A lithium-ion secondary battery with excellent durability is provided using a two-phase coexisting compound as a positive electrode active material. This lithium-ion secondary battery is provided with an electrode body having a positive electrode containing a positive electrode active material and a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte solution containing a lithium salt in an organic solvent. The positive electrode active material is mainly composed of a two-phase coexisting compound containing lithium, and also contains particles of a lithium-transition metal oxide with a layered structure. The particles of the layered oxide have an average particle diameter of 2 ?m or less, and the percentage content thereof in the positive electrode active material is 5 mass % or less.

Abstract: A manufacturing method for an all-solid-state battery including a positive electrode layer, a negative electrode layer, a solid electrolyte layer, a positive electrode current collector layer, and a negative electrode current collector layer is provided. At least one of the positive and negative electrode layers is an electrode layer containing a sulfide-based solid electrolyte and having a first main surface and a second main surface. The manufacturing method includes: shielding at least a central portion of the first main surface and at least a central portion of the second main surface from an ambient atmosphere; and exposing an outer peripheral portion of the electrode layer to an atmosphere having a dew-point temperature of ?30° C. or higher, with at least the central portion of the first main surface and at least the central portion of the second main surface shielded from the atmosphere.

Abstract: A power storage device includes a fuel cell (33), a battery holder (1) and an end plate (40) for sandwiching and binding the fuel cell, and an interposed member (11) disposed between the end plate (40) and the fuel cell (33). The battery holder (1) and the end plate (40) are made of resin, and have a positive coefficient of thermal expansion at a temperature lower than a predetermined temperature. The interposed member (11) is formed to have a substantially negative coefficient of thermal expansion at a temperature lower than the predetermined temperature.

Abstract: A lithium ion secondary battery provided by the present invention has a positive electrode having a current collector and a positive electrode composite layer provided on the current collector. The current collector contains a metal element A as a main component thereof. The positive electrode composite layer contains a two-phase compound containing lithium as a positive electrode active material. The positive electrode composite layer also contains as an additive a compound having a metal element B, in a composition thereof, that has a higher ionization tendency than the metal element A.

Abstract: The lithium-ion secondary battery provided by the present invention comprises a positive electrode, a negative electrode, and a non-aqueous liquid electrolyte. The positive electrode comprises as a primary component of its positive electrode active material, a lithium-containing olivine compound. The positive electrode further comprises 2 to 20 parts by mass of an activated carbon relative to 100 parts by mass of the positive electrode active material.

Abstract: Provided is an assembled battery with which a wasted space can be reduced and having a large energy density. The assembled battery including a first laminated battery provided to a plurality of current collectors, a second laminated battery provided to a plurality of current collectors, and a connecting portion that bundles and connects the plurality of current collectors provided to the first laminated battery and the plurality of current collectors provided to the second laminated battery, wherein the plurality of current collectors provide to the first laminated battery and the plurality of current collectors provided to the second laminated battery are laminated and bundled in the connecting portion, and a lamination direction of the plurality of current collectors in the connecting portion and a lamination direction of the plurality of current collectors in each laminated battery are intersecting with each other.

Abstract: A method of producing a carbon material which is mainly composed of graphene-containing carbon particles is provided. The method includes a step of producing carbon particles from an organic material by maintaining a mixture containing the organic substance as a starting material, hydrogen peroxide and water under conditions of a temperature of 300° C. to 1000° C. and a pressure of 22 MPa or more. The method further includes a step of heat-treating the carbon particles at a higher temperature than the temperature maintained in the carbon particle producing step. The carbon material produced by the present method has a structure in which substances such as ions can easily enter and leave the graphene structures of the carbon particles, making the carbon material be useful as active materials of secondary batteries and electric double layer capacitors.

Abstract: Provided is an assembled battery with which a wasted space can be reduced and having a large energy density. The assembled battery including a first laminated battery provided to a plurality of current collectors, a second laminated battery provided to a plurality of current collectors, and a connecting portion that bundles and connects the plurality of current collectors provided to the first laminated battery and the plurality of current collectors provided to the second laminated battery, wherein the plurality of current collectors provide to the first laminated battery and the plurality of current collectors provided to the second laminated battery are laminated and bundled in the connecting portion, and a lamination direction of the plurality of current collectors in the connecting portion and a lamination direction of the plurality of current collectors in each laminated battery are intersecting with each other.

Abstract: Provided is a lithium-ion secondary battery having an excellent initial capacity as well as a good capacity retention rate. The battery comprises a positive electrode comprising a positive electrode active material, a negative electrode comprising a negative electrode active material, and a non-aqueous liquid electrolyte. The negative electrode active material comprises a graphitic material that satisfies each of the following properties: (a) in its Raman spectrum obtained by Raman scattering analysis using an exciting light at a wavelength of 532 nm, having a ratio of its D-peak intensity ID to its G-peak intensity IG, an R value (ID/IG), of 0.15 or smaller; and (b) having a full width at half maximum of the G peak, ?vG, of 23 cm?1 or smaller. The secondary battery has a capacity retention rate of 70% or greater when subjected to 500 cycles of charging and discharging at a constant current rate of 2 C at 60° C.

Abstract: Provided is a secondary battery system which can accurately detect a state of a secondary battery system (such as a secondary battery state and a secondary battery system failure). The secondary battery system (6) includes dV/dQ calculation means which calculates a dV/dQ value as a ratio of a change amount dV of a battery voltage V of a secondary battery (100) against a change amount dQ of an accumulation amount Q when the accumulation amount Q of the secondary battery (100) is changed. The secondary battery system (6) detects the state of the secondary battery system (6) by using the dV/dQ value.

Abstract: A battery control system controls an external charging unit in a vehicle including a vehicle body, engine, motors, secondary battery, and the external charging unit, and includes a degradation detecting unit that detects degradation of the secondary battery, during charging of the second battery by the external charging unit.

Abstract: A negative electrode active material layer (243) of a lithium-ion secondary battery (100) has a region (243a) facing a positive electrode active material layer (223) and regions (243b1), (243b2) not facing the positive electrode active material layer (223). Therein, the equilibrium potential Ea of the region (243a) facing the positive electrode active material layer (223) is higher than the equilibrium potential Eb of the regions (243b1), (243b2) not facing the positive electrode active material layer (223) (Ea>Eb).

Abstract: The lithium-ion secondary battery provided by the present invention comprises a positive electrode, a negative electrode, and a non-aqueous liquid electrolyte. The positive electrode comprises as a primary component of its positive electrode active material, a lithium-containing olivine compound. The positive electrode further comprises 2 to 20 parts by mass of an activated carbon relative to 100 parts by mass of the positive electrode active material.

Abstract: Provided is a lithium-ion secondary battery having an excellent initial capacity as well as a good capacity retention rate. The battery comprises a positive electrode comprising a positive electrode active material, a negative electrode comprising a negative electrode active material, and a non-aqueous liquid electrolyte. The negative electrode active material comprises a graphitic material that satisfies each of the following properties: (a) in its Raman spectrum obtained by Raman scattering analysis using an exciting light at a wavelength of 532 nm, having a ratio of its D-peak intensity ID to its G-peak intensity IG, an R value (ID/IG), of 0.15 or smaller; and (b) having a full width at half maximum of the G peak, ?vG, of 23 cm?1 or smaller. The secondary battery has a capacity retention rate of 70% or greater when subjected to 500 cycles of charging and discharging at a constant current rate of 2 C at 60° C.

Abstract: A battery control system controls an external charging unit in a vehicle including a vehicle body, engine, motors, secondary battery, and the external charging unit, and includes a degradation detecting unit that detects degradation of the secondary battery, during charging of the second battery by the external charging unit.

Abstract: A lithium-ion secondary battery with excellent durability is provided using a two-phase coexisting compound as a positive electrode active material. This lithium-ion secondary battery is provided with an electrode body having a positive electrode containing a positive electrode active material and a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte solution containing a lithium salt in an organic solvent. The positive electrode active material is mainly composed of a two-phase coexisting compound containing lithium, and also contains particles of a lithium-transition metal oxide with a layered structure. The particles of the layered oxide have an average particle diameter of 2 ?m or less, and the percentage content thereof in the positive electrode active material is 5 mass % or less.

Abstract: A battery control system controls an external charging unit in a vehicle including a vehicle body, engine, motors, secondary battery, and the external charging unit, and includes a degradation detecting unit that detects degradation of the secondary battery, during charging of the second battery by the external charging unit.