Patent ID: 7311998

Claim:
A polymer battery comprising: a negative electrode comprising, as an active material, a carbon material containing graphite particles having amorphous carbon attached to the surface thereof; an electrolyte layer; and a positive electrode comprising at least a lithium-containing chalcogenide as an active material, wherein the electrolyte layer comprises a lithium salt, an organic electrolyte comprising 2 to 35 percent ethylene carbonate by weight, and a composite obtained by crosslinking a precursor of an ion-conductive compound contained in the positive electrode or the negative electrode together with a precursor of an ion-conductive compound contained in a polymer fiber forming the electrolyte layer, and wherein the ion-conductive compound is a crosslinked substance obtained by crosslinking at least one precursor of an ion-conductive compound represented by the formula: wherein R 1 is a hydrogen atom or methyl group, A 1 , A 2 and A 3 are bivalent residues having at least three ethylene oxide units (EO) and optionally containing at least one propylene oxide unit (PO) wherein the numbers of PO and EO satisfy 0≦PO/EO≦5, and the average molecular weight of the ion-conductive compound is 7500 to 9000.