| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery capable of restraining break or collapse of an alloy layer caused by expansion and contraction of its volume accompanying storage and release of lithium ion. <P>SOLUTION: The nonaqueous electrolyte secondary battery 10 is provided with an anode can 16. The anode can 16, of a double-layer structure of a stainless steel layer 21 and an aluminum layer 22, in which, the aluminum layer 22 and a lithium foil 15 get crimped and in contact with electrolyte solution to have a lithium-aluminum alloy layer formed. At a bottom face 16b of the anode can 16, concave parts 23 are formed. An inner side face of each concave part 23 is of a semi-circular curved surface, and is so structured to eliminate a continuous part where stress is concentrated at its inside. With this, stress of the aluminum alloy layer can be dispersed at its expansion and contraction accompanying storage and release of lithium ion. <P>COPYRIGHT: (C)2008,JPO&INPIT |
