Lithium Anode Cells Operating at Room Temperature in Inorganic Electrolytic Solutions.
GTE LABS INC WALTHAM MASS
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Lithium anode electrochemical cells have been operated at room temperature using electrolytic solutions of lithium salts in inorganic solvents such as phosphorus oxychloride, thionyl chloride and sulfuryl chloride. Lithium metal can be electrodeposited from these solutions accompanied, in the case of chlorine containing electrolytes, by the simultaneous electrogeneration of chlorine at the positive electrode. The resulting lithiumchlorine electrochemical cells have open circuit potentials of 4.0 to 4.3V, depending on the presence of excess Lewis acid in the electrolyte. The solvents are compatible with both lithium metal and with strong oxidants including chlorine Cl2, cupric acid CuF2, polycarbon monofluoride CFn, and tungsten trioxide WO3 which can be used as cathode materials. The solvents themselves, while difficult to oxidize, can be electrochemically reduced at various catalytic surfaces such as carbon black and metals and act as cathode depolarizers. This catalytic solvent reduction process leads to cells with exceptionally stable voltages and energy densities in excess of 500 Whkg. Author
- Physical Chemistry
- Electrochemical Energy Storage