Negative electrode for lithium ion secondary battery, method for producing the same, lithium ion secondary battery and method for producing the same

摘要

A negative electrode for a lithium ion secondary battery, including: a negative electrode material mixture including an active material powder capable of reversibly absorbing and desorbing lithium, and a binder, wherein the active material includes at least one element selected from the group consisting of Si and Sn, and the binder includes at least one selected from the group consisting of an ethylene-acrylic acid copolymer and an ethylene-methacrylic acid copolymer.