DISCHARGE CHARACTERISTICS OF A LITHIUM BATTERY WITH APROTIC ELECTROLYTE AND AN IRON PHOSPHORUS TRISULFIDE CATHODE

We have estimated the theoretical specific capacitances of cathodes ma de of phosphorus trichalogenides of metals in the iron subgroup assumi ng the current-forming reactions occur with participation of 1.5, 2, 6 , and 9 lithium atoms per formula unit MPX3 (M = Fe, Co, Ni; X = S, Se ). In this group of compounds FePS3 and NiPS3 have the highest theoret ical specific capacitance. We have studied the discharge characteristi cs of a lithium battery with a cathode made of iron phosphorus trisulf ide and an aprotic electrolyte (1 M solution of LiBF4 in gamma-butyrol actone), which confirmed the possibility of realizing the limiting cas e in the Li/FePS3 system corresponding to participation of nine electr ons in the oxidation-reduction process.