| abstract |
(57) [Summary] [Purpose] The main object is to provide an improved lithium secondary battery using a carbon material as a negative electrode and using propylene carbonate as at least a part of an organic solvent of an electrolytic solution. [Configuration] 1. A negative electrode for a lithium secondary battery in which the surface of a carbon material used as a component of the negative electrode is coated with a thin film of a lithium ion conductive solid electrolyte. 2. The crystallite size (L c ) of the carbon material in the C-axis direction is 3 The negative electrode for a lithium secondary battery according to the above item 1, which has a thickness of at least 00 Å. 3. A lithium secondary battery in which a material obtained by coating the surface of a carbon material with a thin film of a lithium ion conductive solid electrolyte is used as a constituent element of a negative electrode. 4. The crystallite size (L c ) of the carbon material in the C-axis direction is 3 4. The lithium secondary battery according to the above item 3, which has a thickness of 00 angstroms or more. 5. Item 4. The lithium secondary battery according to Item 3, wherein propylene carbonate is used as at least a part of the organic solvent of the electrolytic solution. |