Abstract
The specific characteristics of natural pyrite (FeS2) are investigated using a galvanostatic cycling method. The investigation is carried out for electrolytes consisting of dimethylcarbonate (DMC) and a lithium salt (LiBF4, LiClO4, or LiN(CF3SO2)2). It is shown that the specific capacitance of FeS2 and its stability during cycling depend on the concentration and the nature of a lithium salt anion. The greatest efficiency of the galvanostatic cycling of FeS2 is achieved for the DMC-LiClO4 and DMC-LiN(CF3SO2)2 electrolytes in salt concentrations in the range of 0.1–0.2 molar fractions.
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