NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

A negative electrode 10 for nonaqueous secondary batteries has an active material layer 12 containing active material particles 12a and having a metallic material 13 having low capability of forming a lithium compound deposited between the particles 12a by electroplating. The surface of the active material layer 12 is coated continuously or discontinuously with a surface layer 14 having an average thickness of 0.25 µm or less and made of a metallic material that is the same as or different from the metallic material 13. The particles 12a inside the active material layer 12 are preferably coated with the metallic material 13 while leaving voids between the particles 12a coated with the metallic material 13. The average thickness of the metallic material 13 coating the particles 12a is preferably 0.05 to 2 µm.