NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

A negative electrode (10) for use in a non-aqueous electrolyte secondary battery comprises an active material layer (12) containing a particle (12a) of an active material. At least a part of the surface of the particle (12a) is coated with a metal material (13) having a poor ability of forming a lithium compound. A void is formed between the particles (12a) that are coated with the metal material (13). The particle (12a) has a bulk density of 0.2 to 0.8 g/ml. Preferably, the particle (12a) has a tap density of 0.5 to 1.1 g/ml. Also preferably, the metal material (13) covers the surface of the particle (12a) in the thickness of 0.05 to 2 µm on average.