Low temperature synthesis of crystalline pyrite FeS2 for high energy density supercapacitors
Chemical Communications2023Vol. 59(60), pp. 9263–9266
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Abstract
Herein, we report a low-temperature synthesis of crystalline pyrite-FeS2 through a solid-state annealing route, which was achieved using FeOOH, a metastable precursor, in the presence of H2S gas. The as-synthesized pyrite FeS2 was employed as an electrode for fabricating high energy density supercapacitors. The device delivered a high specific capacitance of 51 mF cm-2 at 20 mV s-1 and showed a superior energy density of 30 μW h cm-2 at a power density of 1.5 mW cm-2.
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