Diatomite-like KFeS 2 for Use in High-Performance Electrodes for Energy Storage and Oxygen Evolution.
Nanomaterials (Basel, Switzerland)(2023)
摘要
Bifunctional materials possess remarkable properties that allow them to store and convert electrical energy easily. In this paper, diatomite-like potassium iron disulfide (KFeS) was synthesized by a multistep sacrificial template method, and its morphological, electrochemical, and oxygen evolution reaction (OER) properties were investigated. KFeS was found to be porous, hollow, and cake-like, which suggests a high specific surface area (SSA) and abundant electrochemically active sites. A very high specific capacitance of 651 F g at 1.0 A g was also obtained due to the substance's unique structure and high porosity. Additionally, the diatomite-like KFeS possessed a very low overpotential ƞ of 254 mV at a current density of 10 mA cm and a small Tafel slope of about 48.4 mV dec. Thus, the diatomite-like KFeS demonstrates broad application prospects for both energy storage and conversion.
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关键词
KFeS2,diatomite,hydrothermal synthesis,oxygen evolution reaction,supercapacitors
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