NON-AQUEOUS SECONDARY BATTERY

摘要

A non-aqueous secondary battery includes a positive electrode composite material layer (10b). In a cross-section in a direction of thickness of the positive electrode composite material layer (10b), the positive electrode composite material layer (10b) includes a first region (R1) including one end portion in a direction intersecting with the direction of thickness (TD), a second region (R2) including the other end portion, and a third region (R3) lying between the first region (R1) and the second region (R2). The first region (R1) is composed of a first composite material containing lithium iron phosphate (1) and lithium nickel cobalt manganese composite oxide (2), and the second region (R2) is composed of a second composite material containing lithium iron phosphate (1) and lithium nickel cobalt manganese composite oxide (2). The third region (R3) is composed of a third composite material containing lithium nickel cobalt manganese composite oxide (2).