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Intrinsic effects of precursor functional groups on the Na storage performance in carbon anodes

Nano Research 2023年第11期16卷 12579-12586页

作者： Xiaohan Tang Fei Xie Yaxiang Lu Zhao Chen Xiangfei Li Hong Li Xuejie Huang Liquan Chen Yuanjiang Pan Yong-Sheng Hu Department of Chemistry Zhejiang UniversityHangzhou 310027China Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Huairou Division Institute of PhysicsChinese Academy of SciencesBeijing 101400China Yangtze River Delta Physics Research Center Co. Ltd.Liyang 213300China College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China

The oxygen-containing functional groups in disordered carbon anodes have been widely reported to influence the Na storage performance.However,the effect of original oxygen-containing groups in the precursors on the final structures and electrochemical performance is rarely studied.Herein,we used the anthraquinone derivatives with different oxygen-containing functional groups as precursors to make the disordered carbon anodes for Na-ion batteries(NIBs).Through comprehensive structural and electrochemical analyses,we found that the different types of functional groups in carbon precursors directly affect the cross-linking process during carbonization.The original precursors containing enough inter-chain oxygen or oxygen-containing functional groups with unsaturated bonds unattached to the ring are beneficial for the oxygen atoms to remain or cross-link in structure to result in more C–O–C group,forming nanovoids and disordered structure,which then determine the high performance of the carbon anodes in NIBs.This work highlights the importance of the type/content of functional groups in precursor and provides guidance for the future design of carbon anodes in NIBs from the perspective of precursor selection.

关键词： disordered carbon precursor oxygen-contained functional group Na-ion batteries

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