Patent ID: 7270914

Claim:
A lithium secondary battery comprising an anode having a layer of electroactive substance comprised of a carbonaceous material capable of electrochemically inclusion and release of lithium, a cathode having a layer of electroactive substance comprised of a chalcogenide compound containing lithium, and a polymer electrolyte layer sandwiched between the cathode and the anode, said polymer electrolyte layer being comprised of a matrix of a crosslinked ion-conductive polymer retaining a nonaqueous electrolyte solution, wherein said cathode and anode contain in the interior thereof a precursor monomer of said ion-conductive polymer in a proportion from 30 to 80% by weight based on the total weight of said monomer before polymerization, and wherein the precursor monomer of said ion-conductive polymer present within said cathode and anode has a polymerization functionality equivalent weight smaller than the polymerizable functionality equivalent weight of the precursor monomer used in the fabrication of the polymer electrolyte sandwiched between the cathode and the anode.