INFLUENCE OF CURRENT COLLECTOR MATERIALS OF THE POSITIVE ELECTRODE ONSTORAGE CHARACTERISTICS OF LI MNO2 BATTERIES/

Current collector materials of the positive electrode of Li / MnO2 pri mary batteries show great influence on the storage characteristics. Th e corrosion resistances of various kinds of stainless steels and their influences on the storage characteristics of the batteries were inves tigated to find out preferred materials for the current collector. Cyc lic voltammograms and corrosion behavior of the stainless steels in th e cylindrical battery showed that the stainless steel containing of Mo and less amount of Ni has higher corrosion resistance. The current co llectors were more corrosion resistant in the electrolyte containing L iClO4 as a supporting salt than in the electrolytes containing LiAsF6, LiCF3SO3, and LiBF4. The corrosion resulted in the fall of the open c ircuit voltage and enlargement of the internal impedance.