SILICON-BASED ALLOY CATHODE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a Si-based alloy cathode material having a good conductivity, which is arranged for use for power storage devices including a lithium ion secondary battery and a hybrid capacitor such that movements of lithium ions are caused at charge and discharge thereof.

SOLUTION: The Si-based alloy cathode material takes a powder form, and comprises a composite phase which includes a Si phase; and a SixCuy phase including a SixCuy alloy consisting of an intermetallic compound of Si and Cu. The composition of the SixCuy phase meets xCOPYRIGHT: (C)2013,JPO&INPIT