NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND COMBINED BATTERY

摘要

A non-aqueous electrolyte secondary battery includes a metal outer package container, an electrode group housed in the metal outer package container and comprising a positive electrode, a negative electrode having an active material which absorbs lithium ions at a potential higher by 0.4 V or more than the electrode potential of lithium and a separator interposed between the negative electrode and the positive electrode, a non-aqueous electrolyte housed in the metal outer package container, a positive electrode lead of which one end is electrically connected to the positive electrode, a negative electrode lead of which one end is electrically connected to the negative electrode, a positive electrode terminal attached to the metal outer package container and being electrically connected with the other end of the positive electrode lead, a negative electrode terminal attached to the metal outer package container and electrically connected with the other end of the negative electrode lead, and an Sn alloy film interposed between the negative electrode lead and the negative electrode terminal. The Sn alloy film contains Sn and at least one metal selected from the group consisting of Zn, Pb, Ag, Cu, In, Ga, Bi, Sb, Mg and Al.