Abstract: A battery is provided. The battery includes a battery element; a film-like outer package member configured to accommodate the battery element; and a carbon fiber sheet provided between the battery element and the film-like outer package member, and the carbon fiber sheet includes long fibers.

Abstract: It is an object to provide a battery and a battery module having excellent reliability. There is provided a battery including a battery element, an exterior body that covers the battery element, and a conductor, in which the conductor is disposed outside the battery element, and the conductor has a cut portion, and there is further provided a battery module including a plurality of batteries and a conductor, in which each of the batteries includes a battery element and an exterior body that covers the battery element, the conductor is disposed outside the battery element, and the conductor has a cut portion.

Abstract: A charging device is provided. The charging device switches to a (n+1)-th charging rate from a n-th charging rate when constant current charging is performed on a secondary battery at the n-th charging rate, at an SOC smaller than an SOC at which a voltage local minimum value appears when an experimental battery is charged at the n-th charging rate. The (n+1)-th charging rate is lower than the n-th charging rate, and n is a natural number.

Abstract: A battery is provided. The battery includes a battery element; a film-like outer package member configured to accommodate the battery element; and a carbon fiber sheet provided between the battery element and the film-like outer package member, and the carbon fiber sheet includes long fibers.

Abstract: A cathode contains: a lithium cobalt composite oxide expressed by LixCoaM1bM2cO2, where M1 denotes the first element; M2 indicates the second element; x, a, b, and c are set to values within ranges of 0.9?x?1.1, 0.9?a?1, 0.001?b?0.05, and 0.001?c?0.05; and a+b+c=1; a first sub-component element of at least one kind selected from a group containing Ti, Zr, and Hf, and a second sub-component element of at least one kind selected from a group containing Si, Ge, and Sn. 0.01 mol %?(content of the first sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide. 0.01 mol %?(content of the second sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide.

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 cathode contains: a lithium cobalt composite oxide expressed by LixCoaM1bM2cO2, where M1 denotes the first element; M2 indicates the second element; x, a, b, and c are set to values within ranges of 0.9?x?1.1, 0.9?a?1, 0.001?b?0.05, and 0.001?c?0.05; and a+b+c=1; a first sub-component element of at least one kind selected from a group containing Ti, Zr, and Hf, and a second sub-component element of at least one kind selected from a group containing Si, Ge, and Sn. 0.01 mol %?(content of the first sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide. 0.01 mol %?(content of the second sub-component element)?10 mol % as a ratio to cobalt in the lithium cobalt composite oxide.

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 LixCo1-yAyO2 (where A is at least one kind of element selected from Mg and Al; 0.05?x?1.15; 0?y?0.03).