NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode for a nonaqueous electrolyte secondary battery of which the energy density is high and charge/discharge characteristics are excellent, and to provide the nonaqueous secondary battery.

SOLUTION: The negative electrode for the nonaqueous electrolyte secondary battery has a current collector (2), an electrode material layer (5) containing an electrode material (4) which can reversibly store and release Li ions. The electrode material (4) contains at least one kind of element selected from Si, Sn and Al, projections (3) are formed on the surface of the collector (2), and the material layer (5) is disposed on the surfaces of the collector (2) and the projections (3). The projections (3) has a part (3b) facing the surface of the current collector (2) other than contact parts (3a) contacting the collector (2).

COPYRIGHT: (C)2005,JPO&NCIPI