Patent ID: 6670075
Filing Date: 2003-12-30
Classification: H01M,Y02E,Y02P

Abstract:
A lithium polymer secondary battery comprising: a positive electrode comprising a lithium-containing complex oxide; a negative electrode comprising a material capable of intercalating and deintercalating lithium ions; and a separator interposed between said positive electrode and said negative electrode;wherein said positive electrode, said negative electrode and said separator contain a polymer electrolyte comprising a polymer material, a non-aqueous solvent and a solute, and wherein the weight Wp of the polymer material contained in said positive electrode, the weight Wn of the polymer material contained in said negative electrode and the weight Ws of the polymer material contained in said separator satisfy all of the following: Wsâ€ƒâ€ƒ(1) 20&lE;100Wp/(Wp+Wn+Ws)&lE;50â€ƒâ€ƒ(2) 20&lE;100Wn/(Wp+Wn+Ws)&lE;50â€ƒâ€ƒ(3) 20&lE;100Ws/(Wp+Wn+Ws)&lE;50â€ƒâ€ƒ(4).