NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND METHOD FOR PRODUCING SAME

摘要

A negative electrode for a lithium secondary battery includes a current collector and an active material layer carried on the current collector. The active material layer includes a plurality of columnar particles, and the columnar particles include silicon element. The columnar particles are inclined relative to the direction of the normal to the current collector, and the active material layer has a porosity P and 10%‰¦P‰¦70%. The columnar particles preferably form an angle ¸ with the direction of the normal to the current collector, and 10°‰¦¸‰¦80°.