Polysulfide battery

Details Polysulfide battery Polysulfide battery

H - Electricity

01

M

319/35, 319/43

H01M 4/36 (2006.01) H01M 8/18 (2006.01) H01M 10/36 (2006.01)

Patent

CA 1303669

Abstract of the Disclosure A half-cell of an electric storage cell comprises an electrocatalytic electrode immersed in an aqueous salt solution of potassium and/or other polysulfide anions in high concentration so that the sulfur species which may be electrochemically oxidized or reduced form substantial components of the solution (e.g. at least 20% by weight). Na+ and OH- salts which limit polysulfide solubility and/or solution stability are not added to the salt solution. Aqueous KS?2 in the storage cell contains up to 24.5 molal reducible sulfur at 25°C, and up to 34.2 molal reducible sulfur in solution at 50°C. This high faradaic capacity is readily accessible at high current density with minimal polarization losses.

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