| US 7,476,469 B2 | ||
| Lithium secondary battery | ||
| Taeko Ota, Osaka (Japan); Hiroyuki Fujimoto, Kobe (Japan); Ryuji Ohshita, Tokushima (Japan); and Maruo Kamino, Kobe (Japan) | ||
| Assigned to Santo Electric Co., Ltd., Osaka (Japan) | ||
| Appl. No. 10/451,846 PCT Filed Jan. 17, 2002, PCT No. PCT/JP02/00265 § 371(c)(1), (2), (4) Date Jun. 26, 2003, PCT Pub. No. WO02/058182, PCT Pub. Date Jul. 25, 2002. |
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| Claims priority of application No. 2001-010448 (JP), filed on Jan. 18, 2001. | ||
| Prior Publication US 2005/0100790 A1, May 12, 2005 | ||
| Int. Cl. H01M 4/40 (2006.01); H01M 4/66 (2006.01) | ||
| U.S. Cl. 429—330 [429/231.95; 429/245] | 18 Claims |
| 1. A rechargeable lithium battery including a positive electrode, a negative electrode and a nonaqueous electrolyte, said
negative electrode being an electrode which has, on a current collector, a thin film of active material that stores and releases
lithium by forming a solid solution with lithium, said thin film of active material being divided into columns by gaps formed
therein in a manner to extend in its thickness direction, and said columnar portions being at their bottoms adhered to the
current collector,
said rechargeable lithium battery being characterized in that said nonaqueous electrolyte includes a mixed solvent consisting
of two or more different solvents and containing at least ethylene carbonate as its constituent and that said thin film of
active material is an amorphous or microcrystalline thin film.
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