MANUFACTURING METHOD OF POWER STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To enhance performance such as higher cycle characteristics in a power storage device.SOLUTION: A power storage device comprises a current collector and a crystalline semiconductor layer having whiskers formed on and in close contact with the current collector. Enhancing a closer contact suppresses detachment of the crystalline semiconductor layer, achieves a cycle characteristic in which the specific capacity of a tenth cycle to a first cycle is 90% or more, and achieves a cycle characteristic in which the specific capacity of a hundredth cycle to the first cycle is 70% or more.