NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING SAME

摘要

Disclosed is a nonaqueous electrolyte secondary battery which is excellent in charge/discharge cycle characteristics, more specifically a nonaqueous electrolyte secondary battery wherein deterioration in conductivity of the negative electrode is suppressed which deterioration occurs due to charge/discharge cycles. Also disclosed is a method for producing such a nonaqueous electrolyte secondary battery. The nonaqueous electrolyte secondary battery comprises a positive electrode and a negative electrode which are capable of reversibly absorbing and desorbing lithium ions, and a nonaqueous electrolyte having lithium ion conductivity. The negative electrode includes a collector and active material particles arranged on the collector. The active material particles contain Si and at least one element (R) selected among Sn, In, Ga, Pb and Bi, and a metallic bond including the element (R) is formed between the active material particles.