Preparation of VO2(B) and a non-aqueous secondary cell using VO2(B) cathode

摘要

VO2(B) is prepared by heating NH4VO3 to a decomposition temperature between about 200 DEG C. and about 537 DEG C. in an atmosphere comprising excess ammonia, whereby ammonia and water vapor are liberated, leaving a residue of VO2(B), the liberated water vapor is removed and the VO2(B) recovered. Non-aqueous secondary cells having a cathode including the resulting VO2(B) resist loss of energy capacity upon cycling.