Patent ID: 6800400
Filing Date: 2004-10-05
Classification: H01M,Y02E,Y02P

Abstract:
A lithium secondary battery comprising a positive electrode, a negative electrode and a nonaqueous electrolyte,wherein said positive electrode or said negative electrode is an electrode obtained by depositing a thin film of active material capable of lithium storage and release on a current collector, the thin film is divided into columns by gaps formed therein in a manner to extend in its thickness direction, and said columnar portions are adhered at their bottoms to said current collector, and wherein said nonaqueous electrolyte contains carboxylic ester represented by the general formula (4): â€ƒwherein R10 represents a fluoroalkyl group having 1 to 4 carbon atoms, and R11 represents an alkyl group having 1 to 5 carbon atoms.