Insoluble Sulfide Positive Electrodes for Organic Electrolyte Lithium Secondary Batteries

Abstract

The behavior of , , , , and as positive electrodes for rechargeable Li cells was investigated using a electrolyte. Of these sulfides gave the best performance delivering at 1 mA/cm2 after 4 and 20 cycles, respectively. These capacities translate into specific energies of 348 and 211 W‐hr/1b based on the weight of and actual cell voltages. It was found that both and can be cycled for 40 cycles but the capacities were not adequate for battery applications. Deterioration of the Li electrode due to reaction of the Li with the electrolyte and reduction of the electrolyte on the electrode below ∼1.5V appear to be the main factors limiting the cycle life of the cell.