Lithium-ion secondary battery, and method of producing the same

摘要

A small-sized lithium-ion secondary battery which can be produced at a low cost with a high degree of productivity and which has high degrees of output density and cell performance. The lithium-ion secondary battery includes a plurality of laminar sheets 16 laminated on each other. Each laminar sheet 16 includes a positive electrode sheet 12 consisting of a positive electrode active substance layer 20 and a first solid electrolyte layer 24 laminated integrally on each of the opposite surfaces of a positive electrode collector foil 18, and a negative electrode sheet 14 consisting of a negative electrode active substance layer 28 and a second solid electrolyte layer 32 laminated integrally on each of the opposite surfaces of a negative electrode collector foil 26.