Abstract
As part of a study on seawater batteries, cells with cupric oxalate cathodes and aluminum alloy A6 anodes were discharged at room temperature. The cupric oxalate cathodes gave their highest capacity, about 94–96% of theoretical capacity, when discharges lasted 4–8 days. Metallic copper was the predominant discharge product. Adding sulfur to the cupric oxalate increased the average discharge potential by about 0.17V, increased the total amperehour efficiency by 2–3%, and lowered the rate of self‐discharge. Cells using a sulfur‐cupric oxalate mixture delivered most of their capacity at about 1.45V when discharged at the 11‐day rate, and at an average of 1.1V when discharged at the one‐day rate. When sulfur was present, the predominant discharge product was instead of Cu. If cupric oxalate remained after all sulfur had reacted to , then the cupric oxalate and were reduced simultaneously with the final product being .
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