| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery capable of improving cycle characteristics and preservation characteristics. <P>SOLUTION: A positive electrode 21 and a negative electrode 22 are located so as to face each other through a polymer electrolyte 23 and wound. The negative electrode 22 comprises a negative electrode current collector 22A and a negative electrode active material layer 22B. It is desirable that the negative electrode active material layer 22B contains at least one kind out of a group made of an element unit or a compound capable of forming an alloy with Li such as Si or Sn, and is formed by vapor growth method, liquid phase method or sintering method, further, it is desirable that the negative electrode active material layer is alloyed with the negative electrode current collector 22A at least at a part of interface with the negative electrode current collector 22A. The polymer electrolyte 23 contains an electrolytic solution and a polymeric compound having a structure in which a polymeric compound having a group with ether bonding and a polymeric group are polymerized. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
