Nonaqueous secondary battery

摘要

A nonaqueous secondary battery is disclosed, comprising a positive electrode sheet containing a lithium-containing transition metal oxide as a positive electrode active material, a negative electrode sheet containing a negative electrode material capable of intercalating and deintercalating lithium, and a nonaqueous electrolyte containing a lithium salt, wherein a current collector of said positive electrode sheet is made of an aluminum foil containing 0.6 to 2% by weight of manganese and not more than 1.5% by weight of magnesium and has a thickness of 5 to 200 mumm. The positive electrode current collector has improved mechanical strength against stress imposed during activation and charge and discharge cycles.