Patent Number: 6,761,998

Title: Non-aqueous electrolyte secondary cell

Abstract: A non-aqueous electrolyte secondary battery containing an alloy particle capable of absorbing and desorbing lithium in the negative electrode has a short cycle life and is insufficient in high-rate discharge characteristics, since the alloy particle is pulverized during charge/discharge cycles. In order to solve this problem, a negative electrode is employed, which comprises an alloy particle containing: at least two selected from the group consisting of metal elements and semimetal elements; oxygen; and nitrogen. It is preferred that the alloy particle have a phase A capable of electrochemically absorbing and desorbing lithium ion and a phase B having lithium ion conductivity or lithium ion permeability and that the phase B contain larger amounts of oxygen and nitrogen than the phase A.

Inventors: Sato; Toshitada (Osaka, JP), Bito; Yasuhiko (Minamikawachi-gun, JP), Okamura; Kazuhiro (Hirakata, JP), Nitta; Yoshiaki (Hirakata, JP)

Assignee: Matsushita Electric Industrial Co., Ltd.

International Classification: H01M 4/38 (20060101); H01M 4/02 (20060101); H01M 10/36 (20060101); H01M 4/40 (20060101); H01M 10/40 (20060101); H01M 004/58 ()

Expiration Date: 07/13/2021