ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide an electrode for a lithium secondary battery having high electric charging and discharging capacity, excellent electric charging and discharging cyclic characteristics and small deformation of wrinkling, etc., due to electric charging and discharging. SOLUTION: This electrode for a lithium secondary battery formed by accumulating a thin film made of an active material such as silicon 3 to store and discharge lithium on a current collector 1 constitutes its characteristic feature of forming irregularities on a surface of the current collector and forming cavities 4 the width of which becomes larger toward trough parts 2 of the irregularities of the surface of the current collector in the thickness direction of the thin film.