申请人:Fukui Atsushi
公开号:US20110117431A1
公开(公告)日:2011-05-19
A lithium secondary battery including an electrode assembly and a non-aqueous electrolyte impregnated in the electrode assembly, the electrode assembly containing a positive electrode, a negative electrode having a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, the negative electrode mixture layer containing a binder and negative electrode active material particles, the negative electrode active material particles containing at least one of silicon and a silicon alloy, and a separator interposed between the negative electrode and the positive electrode. The binder contains a polyimide resin having a branch structure formed by imidizing a polyvalent amine having a valency of 3 or more and a tetracarboxylic dianhydride.