Safety Studies on Li/SOCl2 Reserve Battery

摘要

The effects of cell design and metal-phthalocyanine catalysts on the safety of Li/S0C12 reserve cells were evaluated. Cathode-limited design cells either vented or exploded during forced overdischarge. Both forced overdischarge current density, and overdischarge time into reversal influenced the cell failure unpredictably. Anode-limited design cells, on the other hand, generated severe internal heat during reversal, but sustained higher forced overdischarge current densities than cathode-limited design cells without either venting or exploding. When the 1.5M LiAlCl4/S0Cl2 was replaced with 1.5M LiAlCl4/S02Cl2 electrolyte in the cathode-limited design cells, both the cell discharge life and cell safety improved. The catalyst stability and stainless stell (bellow material) compatibility were also studied in both neutral and acidic electrolytes. The catalyst was found to be stable and the stainless steel specimens (316L and 321) experienced only surface corrosion after 12-month storage. The surface film formed during the initial surface corrosion appeared to inhibit further corrosion. Heat cool cycles between -40 and 71 C of fresh cells and partially or fully discharged D-cells did not adversely influence the cell pressure at the end of 100% depth of discharge. (Author)