Abstract: One aspect of the present invention is a positive electrode for an energy storage device including a positive active material layer, in which the positive active material layer includes a positive active material particle having a ratio of a secondary particle size to a primary particle size of 3 or less, and a fibrous conductive agent.

Abstract: A plate includes a current collector, an intermediate layer layered on the current collector, and an active material layer layered on the intermediate layer. The intermediate layer contains conductive particles and insulating particles. At least a portion of an end edge of the intermediate layer is not covered with the active material layer. The intermediate layer hays a higher mass content of the insulating particles in a region not covered with the active material layer than that in a region covered with the active material layer.

Abstract: A plate includes a current collector, an intermediate layer layered on the current collector, and an active material layer layered on the intermediate layer. The intermediate layer contains conductive particles and insulating particles. At least a portion of an end edge of the intermediate layer is not covered with the active material layer. The intermediate layer hays a higher mass content of the insulating particles in a region not covered with the active material layer than that in a region covered with the active material layer.

Abstract: An aspect of the present invention is an electrode for an energy storage device including a conductive substrate, an intermediate layer, and an active material layer in this order. In this electrode, the intermediate layer includes a conductive agent, an inorganic oxide, and a binder, and the content of the inorganic oxide in the intermediate layer is 30% by mass or more and 90% by mass or less.

Abstract: A positive electrode for a battery includes a positive active material, a conductive agent, and a copolymer. The copolymer includes a constituent unit (a) represented by the following general formula (1) and a constituent unit (b) represented by the following general formula (2): (wherein R1, R2, R3, R5, R6, R7 and R9 are the same or different and denote a hydrogen atom, a methyl group or an ethyl group, R4 denotes a hydrocarbon group having 8 to 30 carbon atoms, R8 denotes a linear or branched alkylene group having 2 to 4 carbon atoms, X1 and X2 denote an oxygen atom or NH, and p denotes a number of 1 to 50).

Abstract: A positive electrode for a battery includes a positive active material, a conductive agent, and a copolymer. The copolymer includes a constituent unit (a) represented by the following general formula (1) and a constituent unit (b) represented by the following general formula (2): (wherein R1, R2, R3, R5, R6, R7 and R9 are the same or different and denote a hydrogen atom, a methyl group or an ethyl group, R4 denotes a hydrocarbon group having 8 to 30 carbon atoms, R8 denotes a linear or branched alkylene group having 2 to 4 carbon atoms, X1 and X2 denote an oxygen atom or NH, and p denotes a number of 1 to 50.