NEGATIVE POLE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, ITS MANUFACTURING METHOD AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING IT

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which is higher in charge-and-discharge cycle characteristics, while a high-energy density is obtained by using a thin film including a lithium occlusive element for a negative pole material.

SOLUTION: In a negative pole for the nonaqueous electrolyte secondary battery which reversibly occludes or discharges lithium, a current collector (2) and the negative pole material (3) of a thin-film form that is placed on the current collector (2) are included. The negative pole material (3) of the thin-film form includes a crystal grain (4) that includes the lithium occlusive element. In the negative pole (1), a longer axial direction of the crystal grain (4) is inclined to a surface perpendicular to the main surface of the negative pole material (3) of the thin-film form.

COPYRIGHT: (C)2005,JPO&NCIPI