公开(公告)号：EP2889936A1

公开(公告)日：2015-07-01

申请号：EP13833607.8

申请日：2013-08-27

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： YAMAMOTO, Sukeyoshi ,  NEGI, Noriyuki ,  NAGATA, Tatsuo ,  MORIGUCHI, Koji ,  YONEMURA, Mitsuharu ,  KAKESHITA, Tomoyuki ,  TERAI, Tomoyuki ,  FUKUDA, Takashi

IPC分类号： H01M4/38 ,  C22C9/02

摘要： Provided is a negative electrode active material that can improve the capacity per volume and charge-discharge cycle characteristics of a nonaqueous electrolyte secondary battery represented by a lithium ion secondary battery. The negative electrode active material according to the present embodiment contains an alloy phase. The alloy phase undergoes thermoelastic diffusionless transformation when releasing or occluding metal ions. The negative electrode active material of the present embodiment is used in a nonaqueous electrolyte secondary battery. Thermoelastic diffusionless transformation refers to so-called thermoelastic martensitic transformation.

摘要翻译： 提供一种可以提高锂离子二次电池所代表的非水电解质二次电池的体积容量和充放电循环特性的负极活性物质。 本实施方式的负极活性物质含有合金相。 当释放或吸收金属离子时，合金相经历热弹性无扩散转变。 本实施方式的负极活性物质用于非水电解质二次电池。 热弹性无扩散变换是指所谓的热弹性马氏体转变。