| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a negative electrode and a battery using it wherein charge and discharge efficiency and charge and discharge cycle characteristics can be improved by uniformly forming an SEI coating on the surface of the negative electrode material capable of storing/releasing lithium. <P>SOLUTION: A positive electrode 21 and the negative electrode 22 are oppositely arranged and wound via a separator 23 into which electrolyte is impregnated. At the negative electrode 22, Li metal is made to be precipitated in the middle of charging, and capacity of the negative electrode 22 includes capacity component by storage and release of Li and capacity component by precipitation and solution of Li, and is expressed by the sum. The negative electrode 22 contains the negative electrode material capable of storing and releasing lithium heat-treated after being immersed into at least one of acid solution and alkaline solution. By this, the SEI coating is uniformly formed at the negative electrode 22. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
