Carbon/PTFE Electrode for Lithium/Air-Water Batteries
ARMY RESEARCH LAB ADELPHI MD
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For this project we constructed an inexpensive air cathode free of catalyst, capable of functioning in both acidic and neutral electrolytes, for use in a lithiumair-water battery. The use of acidic electrolyte is necessitated by the formation of the discharge product LiOH from the lithiumair-water reaction. We present a procedure for the construction of a carbonPTFE air cathode for use with both acidic and neutral electrolytes. We evaluated the performance of the cathode in electrolytes ranging from pH0 to pH8 by applying voltage to a half cell, in reference to a AgAgCl reference electrode, and then measuring the steady state current. Current densities were found to be the highest in 1M Hsub2SOsub4, the most acidic electrolyte tested, and decreased as the pH of the electrolyte increased. The cathode performed well enough over the entire pH range to be useful for the lithiumair-water battery.
- Inorganic Chemistry
- Electrical and Electronic Equipment
- Electricity and Magnetism