Initial Study of an Ambient-Temperature Rechargeable Lithium-Sulfur Dioxide Battery. Final Report, June 1-November 30, 1980

摘要

All-inorganic Li/SO sub 2 prototype rechargeable D cells were made with reference electrodes and it was demonstrated that SO sub 2 is deposited quantitatively in the catalytic carbon cathode as lithium dithionite (Li sub 2 S sub 2 O sub 4 ) during cell discharge. It was demonstrated that the Li sub 2 S sub 2 O sub 4 is then quantitatively oxidized to SO sub 2 during the recharge portion of the cell cycle, according to the overall reaction: 2Li + 2SO sub 2 reversible Li sub 2 S sub 2 O sub 4 . It was found that the electrolyte salt Li sub 2 B sub 10 Cl sub 10 is oxidized in solution at slightly over the recharge potential of Li/SO sub 2 to give a one electron oxidation product. The oxidation product undergoes a further one electron oxidation to give a second product at potentials greater than those attained in cell recharge. (ERA citation 07:011021)