Preparation and Zinc Storage Properties of N/O/P Co-doped Melamine-based Porous Carbon Materials
In this work,via a hydrothermal process,melamine and hexa-p-aldehyde phenoxycyclotriphosphazene(HAPCP)were used as raw materials to prepare the cross-linking product rich in nitrogen,phosphorus,and oxygen,which was subsequently carbonized and activated to obtain the carbon-based electrode material for cathode of zinc-ion hybrid capacitors.The morphology,structure,and chemical composition of the carbon-based electrode material were characterized by means of scanning electron microscopy(SEM),X-ray diffractometry(XRD),X-ray photoelectron spectroscopy(XPS),Raman spectroscopy,and nitrogen adsorption-desorption test.The experiment indicated that the prepared carbon-based material had a porous and rough surface morphology,amorphuous carbon structure,and contained nitrogen,phosphorus,and oxygen heteroatoms.The resultant product with a HAPCP/melamine molar ratio of 1:5 and an activation temperature of 800℃(HMAc-800)exhibited a specific capacitance of 390 F·g-1 at a current density of 0.5 A·g-1.The zinc-ion hybrid capacitor,assembled with HMAc-800 as the cathode material and a zinc sheet as the anode,delivered a power density of 456 W·kg-1 at an energy density of 139 Wh·kg-1,demonstrated a strong energy storage capacity.
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