Facile Construction of Carbon Encapsulated of Earth‐Abundant Metal Sulfides for Oxygen Electrocatalysis

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Abstract
Transition metal sulfide (TMS) promises an excellent prospect in electrocatalysis with high intrinsic activity but poor conductivity. In this work, a series of TMS wrapped by a thin carbon layer with enhanced conductivity have been developed by a facile and rapid strategy. Among them, the prepared CoSx compound exhibits the optimal ORR and OER performances because of the synergistic effect between the high intrinsic activity of CoSx and the desirable conductivity of carbon layer. More importantly, the CoSx‐based zinc‐air batteries (ZABs) exhibit a current density of 10 mA cm−2 with voltage gap of 0.8 V and remarkable cycling durability, which is comparable to those of the state‐of‐art noble Pt/C+IrO2 batteries. Therefore, this work introduces a facile route that opens up a new horizon and inspiration for the development of sulfide for energy conversion.
Funding Information
  • China Postdoctoral Science Foundation (2019M652155)

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