Patent ID: 6159636
Filing Date: 2000-12-12
Classification: C01G,C01P,H01M,Y02E

Abstract:
A rechargeable lithium ion cell comprising a positive electrode, a negative electrode and electrolyte, wherein the positive electrode comprises a conductive support, a first layer on said conductive support, said first layer comprising active material comprising lithium manganese oxide of spinel structure of formula Li.sub.x Mn.sub.2 O.sub.4+d (0.9<x<1.2 and 0<d<0.4) and a second layer over said first layer, said second layer comprising active material comprising partially substituted nickelite selected from the group consisting of LiNi.sub.x Co.sub.1-x O.sub.2 (0.1<x<0.9) and LiNi.sub.x Mg.sub.1-x O.sub.2 (0.85<x<0.97) and mixtures thereof.