US Patent 7482095 Anode and battery using the same

An anode, and a battery using the anode is provided. The anode has a structure in which an anode current collector, an anode active material layer and a protective layer are laminated in this order. The anode active material layer includes Sn, and is alloyed with the anode current collector in at least a portion of an interface with the anode current collector. The protective layer include an element constituting a simple substance with a higher melting point than Sn such as C, Si or W, and not forming a compound with Sn. Thereby, even if the anode wound into a roll is subjected to heat treatment, fusion bonding between adjacent anodes can be prevented.