Purposes—To study the electrocatalytic performance of Co and Fe double-doped porous carbon nanosheets(CoFe@N-C),and to assemble CoFe@N-C into a liquid zinc-air battery.Meth-ods—Carbon based CoFe bimetallic nanocomposite oxygen electrocatalyst derived from biomass was synthesized with palm as the precursor of carbon and nitrogen,and the special pore structure of palm was utilized(CoFe@N-C).Its fine structure and morphology were investigated through comprehen-sive analysis by means of X-ray diffractometer,transmission electron microscope and X-ray photoelec-tron spectroscopy.Results—Electrochemical tests reveal remarkable oxygen evolution reaction activity(OER:290 mV)and bifunctional oxygen catalytic performance(△E=0.88 V)of the nano-compos-ite.Moreover,the liquid zinc-air battery equipped with CoFe@N-C as the cathode catalyst exhibits an open circuit voltage of 1.46 V and a long-term cycle stability of approximately 564 cycles.Conclu-sions—CoFe@N-C has excellent catalytic properties and performs well when assembled into liquid zinc-air batteries.This investigation presents a novel avenue for exploiting the potential of biomass-derived carbon-based nanocomposites in electrochemical energy storage devices.
维普
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