To widen the option of solvents for electrolytic solutions to be used in an electrode made of a carbon material which can be doped and dedoped a lithium ion.
A carbon material which can be doped and dedoped with lithium ions is used as a component material of an electrode for a lithium battery and the carbon material has the peak of the inner-most shell electrons (Cls) in a range shifted to higher energy side by 6.5-11.5eV than the carbon-carbon bond energy of Cls of carbon atoms, which compose the carbon material, as the standard in the case the surface of the carbon material is measured by x-ray photoelectron spectroscopy. The carbon material is obtained by electrochemical reduction treatment for a carbon material, which can be doped and dedoped a lithium ion, using an electrolytic liquid produced by dissolving a lithium salt in an aqueous solvent containing a carbonic acid ester substituted with fluorine, and doping and dedoping the lithium ion can be carried out sufficiently in the case of using an electrolytic liquid containing phosphoric acid ester.
YOKOYAMA KEIICHI
FUJITA SHIGERU
KOMARU TOKUO
SONY CORP
| JPH0757728A | 1995-03-03 | |||
| JPH07312218A | 1995-11-28 | |||
| JPH04184870A | 1992-07-01 | |||
| JPH08106901A | 1996-04-23 | |||
| JPH0831404A | 1996-02-02 | |||
| JPH0992280A | 1997-04-04 | |||
| JPH09147865A | 1997-06-06 |