Patent Number: 6,165,645

Title: Polymer electrolyte and lithium polymer battery using the same

Abstract: A gelled polymer electrolyte having a high mechanical strength and a high ion conductivity and a lithium polymer battery using the same electrolyte are disclosed. The gelled polymer electrolyte comprises a polymer alloy and an organic electrolyte solution, wherein the polymer alloy includes a polymer which is hardly soluble in the organic electrolyte solution and another polymer which is soluble in the organic electrolyte solution. The lithium polymer battery comprises a negative electrode including metallic lithium, a lithium alloy, carbon or an inorganic compound, and a positive electrode including an active material of a metal oxide capable of intercalating and deintercalating lithium in a reversible manner, such as LiCoO.sub.2, LiNiO.sub.2 or the like, and the gelled polymer electrolyte placed between both electrodes.

Inventors: Nishimura; Ken (Moriguchi, JP), Ogawa; Masahiko (Moriguchi, JP), Ishida; Akiko (Moriguchi, JP), Eda; Nobuo (Hirakata, JP)

Assignee: Matsushita Electric Industrial Co., Ltd.

International Classification: H01M 10/36 (20060101); H01M 10/40 (20060101); H01M 6/18 (20060101); H01M 010/40 ()

Expiration Date: 12/26/2017