Design Studies for High Rate, High Energy, Nonaqueous Electro-Chemical Energy Conversion Systems.
Final rept. 1 Aug 69-31 Jul 70,
CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE
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Studies have been made of the electrochemical reaction mechanisms, solution properties, and theoretical design criteria for electrochemical energy conversion devices with potentially high energy density. The reduction of meta-dinitrobenzene m-DNB in liquid ammonia and in dimethyl sulfoxide DMSO solutions has been studied. The results show strong dependence of the reduction mechanism on the proton-donating ability of the electrolyte, with an eight electron transfer possible in ammonium nitrate-liquid ammonia solutions. A mathematical model for porous electrodes using sparingly soluble reactants has been developed. The results of numerical calculations based on this model show that mass transfer limiting currents are possible in nonaqueous batteries using such electrodes. In addition, studies of electrolyte solution properties in liquid ammonia, DMSO, and dimethyl sulfite DMSU have been carried out. A new, high voltage, high power density cell has been discovered. Results of cell tests, though preliminary, indicate that the actual packaged energy density of the system may be low ll watt-hrlb. The electrodes are a lithium negative and a lamellar compound of graphite positive. Author
- Physical Chemistry
- Electrochemical Energy Storage