Abstract: An electrode for a rechargeable lithium battery, comprising a current collector layer composed of a metal incapable of alloying with Li, an active material layer provided on said current collector layer and composed of a metal capable of alloying with Li and a surface coating layer provided on a surface of said active material layer, opposite to the surface on which the current collector layer is provided, and composed of a metal incapable of alloying with Li or composed of an alloy of a metal incapable of alloying with Li and a metal capable of alloying with Li.

Abstract: The present invention provides a lithium polymer secondary battery having at least a basic battery cell including a positive electrode, a negative electrode and a polymer electrolyte in an outer can, wherein the battery has a suitable structure to use the polymer electrolyte polymerized in the battery and has excellent cycle characteristics. One of the electrodes is U-shaped and the other electrode is inserted in the U-shaped electrode. The polymer electrolyte includes a polymer containing a polyalkylene oxide structure and a solvent and is polymerized in the battery. The thickness of the battery is not greater than 2 mm.

Abstract: An electrode for a lithium secondary battery in which an alloy thin film containing Sn (tin) and In (indium) is formed on the surface of a current collector having a surface roughness Ra of 0.1 &mgr;m or more, and a lithium secondary battery using thereof.

Abstract: A rechargeable lithium battery using an Li alloying metal as the active material of at least one of its positive and negative electrodes. The metal active material is covered with a thin film which is nonreactive with Li ions, permits passage of Li ions but does not have an Li ion conductivity.