Analysis of Factors Affecting the Sodium Storage Performance of Hard Carbon Anode Materials
The sodium lignosulfonate and phenolic resin are used as the precursors to prepare hard carbon precursors through spray drying or oil bath drying methods.The final hard carbon material is obtained after pre-oxidation,carbonization,and cleaning steps.Scanning electron microscopy,X-ray diffraction,nitrogen adsorption/desorption test,and Raman spectroscopy are used to investigate the differences in the structure and phase of the hard carbon materials synthesized by different preparation methods.The electrochemical performance of the materials prepared by the two methods is analyzed through electrochemical tests.The results indicate that the hard carbon material prepared from hard carbon precursor synthesized by the spray drying method exhibits a more stable spherical structure and smaller specific surface area.As an anode material for sodium ion batteries,this hard carbon material demonstrates higher initial Coulombic efficiency in the battery and better cycling stability.
hard carbonsodium ions batteriesanode materialspray dryingoil bath drying
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