Abstract: An electrode active material for an electrochemical element of the present invention is a monoclinic niobium complex oxide, and Db/Da is 1.5 or more, where Da is a crystallite size in the a-axis direction, and Db is a crystallite size in the b-axis direction. An electrode material for an electrochemical element of the present invention contains the electrode active material for an electrochemical element of the present invention. An electrode for an electrochemical element of the present invention contains the electrode active material for an electrochemical element of the present invention or the electrode material for an electrochemical element of the present invention. In an electrochemical element of the present invention, either one of a positive electrode and a negative electrode is the electrode for an electrochemical element of the present invention. A movable body of the present invention includes the electrochemical element of the present invention.

Abstract: A negative electrode for an all-solid-state secondary battery according to the present invention includes a molded body made of a negative-electrode mixture containing a solid electrolyte and a negative-electrode material that contains a negative-electrode active material. The negative-electrode material contains a carbon material as the negative-electrode active material, and an argyrodite-type sulfide-based solid electrolyte is contained as the solid electrolyte. An AB value is 0.1 or more and 0.8 or less where a percentage of the area of the carbon material to the area of a surface of the molded body is A(%) and a percentage of the area of the carbon material to the area of a cross-section of the molded body is B(%). Also, an all-solid-state secondary battery according to the present invention includes the negative electrode for an all-solid-state secondary battery according to the present invention as the negative electrode.

Abstract: The present invention provides a negative electrode for a non-aqueous electrolyte secondary battery that has excellent charging load characteristics and a non-aqueous electrolyte secondary battery in which the negative electrode is used. The present invention is related to Goals 7 and 12 of the sustainable development goals (SDGs). A negative electrode for a non-aqueous electrolyte secondary battery according to the present invention contains a negative electrode active material and a conductive aid. As the conductive aid, the negative electrode contains carbon nanotubes that have a fiber diameter of 0.8 to 20 nm and an aspect ratio of 5000 or more. Also, a non-aqueous electrolyte secondary battery according to the present invention includes a positive electrode and a negative electrode. As the negative electrode, the non-aqueous electrolyte secondary battery includes the negative electrode for a non-aqueous electrolyte secondary battery according to the present invention.

Abstract: A negative electrode for an all-solid-state secondary battery according to the present invention includes a molded body made of a negative electrode mixture containing a solid electrolyte and a negative-electrode material that contains a negative-electrode active material, in which the negative-electrode material contains a carbon material as the negative-electrode active material, a layer containing an oxide having lithium-ion conductivity is formed on a surface of the negative-electrode material, the amount of the oxide is 1 part by mass or more with respect to 100 parts by mass of the carbon material, and the negative electrode contains a sulfide-based solid electrolyte as the solid electrolyte. Also, an all-solid-state secondary battery according to the present invention includes the negative electrode for an all-solid-state secondary battery according to the present invention as the negative electrode.

Abstract: Provided is an electrochemical element having excellent load characteristics and charge-discharge cycle characteristics, an electrode active material that can constitute the electrochemical element, a method for manufacturing the electrode active material, an electrode material, an electrode, and a movable body including the electrochemical element. The electrode active material for an electrochemical element according to the present invention includes an oxide that has a monoclinic crystal structure and satisfies the following general formula (1): AyM1?Alx??Nb12?x?zM2zO29?? (1). In the general formula (1), A is at least one element selected from Li and Na, M1 is at least one element selected from the group consisting of Fe, Mn, Zn Cu, Ag, Mg Ca, Sr, Ba, Co, Eu, Y, Bi, La, Ce, Nd, Sm, and Gd, M2 is specific element, awl x, y, z, ?, and ? satisfy 0<x?1.1, 0?y?24, 0?z?2, ?1???2, and 0<??0.4x.

Abstract: An all-solid-state battery having excellent output characteristics, and a negative electrode for an all-solid-state battery that can be used in the all-solid-state battery are provided. A negative electrode for an all-solid-state battery according to the present invention includes a molded body made of a negative-electrode mixture that contains a negative-electrode active material, a solid electrolyte, and a conductive assistant, and lithium titanium oxide particles in which a ratio Dp/D50 of a primary particle diameter Dp to a particle diameter D50 is greater than 0.6 and a specific surface area is 2 m2/g or more are contained as the negative-electrode active material. Also, an all-solid-state battery according to the present invention includes a positive electrode, a negative electrode, and a solid electrolyte layer located between the positive electrode and the negative electrode, and the negative electrode for an all-solid-state battery according to the present invention is used as the negative electrode.

Abstract: An all-solid-state battery having excellent load characteristics, and an electrode for an all-solid-state battery for forming the all-solid-state battery are provided. It relates to Goals 12, 3, 7, and 11 of Sustainable Development Goals (SDGs). The electrode for an all-solid-state battery includes a molded body of a mixture containing an active material-containing electrode material, a solid electrolyte, and a conductive assistant. The electrode material is in the form of a composite particle having a layer containing a solid electrolyte A1 or solid electrolyte A2 that contains certain elements on its surface. The mixture molded body includes a solid electrolyte B1 or solid electrolyte B2 that contains certain elements between the composite particles. The compositions of the solid electrolyte A1 and the solid electrolyte B1 satisfy a certain relationship, or the composition of the solid electrolyte A2 and the composition of the solid electrolyte B2 satisfy a certain relationship.

Abstract: Provided are a non-aqueous electrolyte secondary battery excellent in reliability and productivity, a method for manufacturing the same, and a system including the non-aqueous electrolyte secondary battery. A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte. The positive electrode includes a positive electrode mixture layer in which a lithium-containing composite oxide is used as a positive electrode active material. In a charged state, the negative electrode includes an aluminum foil or an aluminum alloy foil and a Li—Al alloy formed by reaction with Li ions deintercaleted from the positive electrode. The Li—Al alloy has a Li content of 7 to 29 atomic % with respect to 100 atomic % of a total of Li and Al at the end of charge.

Abstract: The inventive negative electrode for the electrochemical element includes a negative electrode composition layer provided on at least one surface of a current collector made of a metal foil; in which the negative electrode composition layer includes material S comprising Si and a hardly-graphitizable carbon material as a negative electrode active material; in which assuming that the whole amount of the negative electrode active material contained in the negative electrode composition layer is 100 mass %, a ratio of the material S is 50 to 90 mass % and a ratio of the hardly-graphitizable carbon materials is 10 to 50 mass %. The inventive lithium ion secondary battery includes a positive electrode, a negative electrode, a separator and a nonaqueous electrolyte liquid, and the negative electrode is constituted by the negative electrode for the electrochemical element of the present invention.

Abstract: A lithium secondary battery pack of the present invention includes: a lithium secondary battery including an electrode body formed of a positive electrode and a negative electrode facing each other and a separator interposed therebetween, and a non-aqueous electrolyte; a PTC element; and a protection circuit including a field effect transistor. The lithium secondary battery has an energy density per volume of 450 Wh/L or more, the lithium secondary battery has a current density of 3.0 mA/cm2 or less, and a relational expression (1) and a relational expression (2) below are established where A (m?) is an impedance of the lithium secondary battery and B (m?) is an impedance of the entire circuit unit of the lithium secondary battery pack excepting the impedance A (m?) of the lithium secondary battery: A?50 m???(1) B/A?1??(2).

Abstract: A lithium secondary battery of the present invention includes: a positive electrode; a negative electrode; a nonaqueous electrolytic solution; and a separator. The positive active material contains a lithium-containing composite oxide containing nickel. A molar ratio of a total nickel amount with respect to a total lithium amount contained in the entire positive active material is 0.05 to 1.0. The nonaqueous electrolytic solution contains 0.5 to 5.0 mass % of a phosphonoacetate-based compound represented by the following General Formula (1). In the Formula, R1, R2, and R3 independently represent an alkyl group, an alkenyl group, or an alkynyl group having 1 to 12 carbon atoms, which may be substituted by a halogen atom, and “n” represents an integer of 0 to 6.

Abstract: A lithium secondary battery pack of the present invention includes: a lithium secondary battery including an electrode body formed of a positive electrode and a negative electrode facing each other and a separator interposed therebetween, and a non-aqueous electrolyte; a PTC element; and a protection circuit including a field effect transistor. The lithium secondary battery has an energy density per volume of 450 Wh/L or more, the lithium secondary battery has a current density of 3.0 mA/cm2 or less, and a relational expression (1) and a relational expression (2) below are established where A (m?) is an impedance of the lithium secondary battery and B (m?) is an impedance of the entire circuit unit of the lithium secondary battery pack excepting the impedance A (m?) of the lithium secondary battery: A?50 m???(1) B/A?1??(2).

Abstract: There is provided a lithium secondary battery including a positive electrode, a negative electrode, a nonaqueous electrolyte liquid and a separator, that is subjected to a constant-current constant-voltage charge with a stop voltage of more than 4.25V before its use. The lithium secondary battery uses the nonaqueous electrolyte liquid having contained 0.1 to 5 mass % of a phosphonoacetate compound represented by the following general formula (1), and having contained 0.1 to 5 mass % of 1,3-dioxane. In General Formula (1), each of R1, R2 and R3 is independently hydrocarbon groups having a carbon number of 1 to 12 with or without substituent of a halogen atom, and n is 0 to 6 integers.

Abstract: A lithium secondary battery of the present invention includes: a positive electrode; a negative electrode; a nonaqueous electrolytic solution; and a separator. The positive active material contains a lithium-containing composite oxide containing nickel. A molar ratio of a total nickel amount with respect to a total lithium amount contained in the entire positive active material is 0.05 to 1.0. The nonaqueous electrolytic solution contains 0.5 to 5.0 mass % of a phosphonoacetate-based compound represented by the following General Formula (1). In the Formula, R1, R2, and R3 independently represent an alkyl group, an alkenyl group, or an alkynyl group having 1 to 12 carbon atoms, which may be substituted by a halogen atom, and “n” represents an integer of 0 to 6.

Abstract: A lithium secondary-battery pack of the present invention includes: a lithium secondary battery including an electrode body and a non-aqueous electrolyte, the electrode body including a positive electrode and a negative electrode facing each other, and a separator interposed therebetween; a PTC (Positive Temperature Coefficient) element; and a protection circuit including a field-effect transistor, wherein the negative electrode includes a negative electrode material mixture layer containing a Si-containing material as a negative electrode active material, and, where Z represents an impedance (?) of the lithium secondary-battery pack and Q represents a capacity (Ah) of the lithium secondary-battery pack, an impedance capacity index represented by Z/Q is 0.055 ?/Ah or less.

Abstract: There is provided a lithium secondary battery including a positive electrode, a negative electrode, a nonaqueous electrolyte liquid and a separator, that is subjected to a constant-current constant-voltage charge with a stop voltage of more than 4.25V before its use. The lithium secondary battery uses the nonaqueous electrolyte liquid having contained 0.1 to 5 mass % of a phosphonoacetate compound represented by the following general formula (1), and having contained 0.1 to 5 mass % of 1,3-dioxane. In General Formula (1), each of R1, R2 and R3 is independently hydrocarbon groups having a carbon number of 1 to 12 with or without substituent of a halogen atom, and n is 0 to 6 integers.

Abstract: A non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution where the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and a compound B oxidized at a potential lower than that of the compound A, and the compound B is at least one selected from an aromatic compound and a heterocyclic compound. Thus, a non-aqueous secondary battery having excellent overcharging safety and being capable of ensuring storage reliability with less generation of gas during storage at a high temperature can be provided.

Abstract: A non-aqueous secondary battery is provided, which has excellent overcharging safety, less generation of gas during storage at a high temperature, and can ensure storage reliability. A non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and an aromatic or/and heterocyclic compound B oxidized at a potential lower than that of the compound A, a content of the compound A with respect to the total non-aqueous electrolyte solution is 1% by mass to 15% by mass, and a content of the compound B with respect to the total non-aqueous electrolyte solution is 0.005% by mass to 3% by mass.

Abstract: A non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution where the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and a compound B oxidized at a potential lower than that of the compound A, and the compound B is at least one selected from an aromatic compound and a heterocyclic compound. Thus, a non-aqueous secondary battery having excellent overcharging safety and being capable of ensuring storage reliability with less generation of gas during storage at a high temperature can be provided.

Abstract: A lithium secondary battery pack of the present invention includes: a lithium secondary battery including an electrode body formed of a positive electrode and a negative electrode facing each other and a separator interposed therebetween, and a non-aqueous electrolyte; a PTC element; and a protection circuit including a field effect transistor. The lithium secondary battery has an energy density per volume of 450 Wh/L or more, the lithium secondary battery has a current density of 3.0 mA/cm2 or less, and a relational expression (1) and a relational expression (2) below are established where A (m?) is an impedance of the lithium secondary battery and B (m?) is an impedance of the entire circuit unit of the lithium secondary battery pack excepting the impedance A (m?) of the lithium secondary battery: A?50 m???(1) B/A?1??(2).