Patent ID: 6517974
Filing Date: 2003-02-11
Classification: H01M,Y02E,Y02T

Abstract:
A lithium secondary battery comprising at least a negative electrode, a positive electrode and an electrolyte, and utilizing oxidation and reduction reactions of lithium ions for charging and discharging,wherein said positive electrode has an active material which has at least an amorphous phase, which exhibits peaks having a half value width not narrower than 0.48 degrees at a highest diffraction intensity at 2&thgr; on an X-ray diffractometric chart traced at a diffraction intensity at an X-ray diffraction angle of 2&thgr;, and which is a composite consisting of a (i) material which contains at least one element selected from the group consisting of cobalt, nickel, manganese and iron and (ii) a material which is made electrochemically inactive in the positive electrode during a charging/discharging reaction of the lithium battery and contains carbon or at least one metal having less noble standard electrode potential.