Patent ID: 6187477
Filing Date: 2001-02-13
Classification: H01M,Y02E

Abstract:
A lithium secondary battery comprising:a cathode which can be dischargeably charged with lithium ions;an anode selected from the group consisting of lithium metal and a lithium alloy; andan electrolyte which allows migration of lithium ions between both electrodes;wherein the cathode contains a halogen compound in addition to a cathode active substance, an electrically conductive agent and a binder, the halogen compound releasing halogen atoms, halogen ions or a reactive halogen containing substance for reacting with the anode and for thereby deactivating the anode to prevent excessive heat generation before oxygen released from the cathode due to a temperature rises reacts with the anode; andwherein the halogen compound is selected from the group consisting of tetrabromobisphenol S and 4,4'-diiodobiphenyl.