多级结构MoS<sub>2</sub>/C复合材料的储锂性能

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摘要利用二硫化钼和葡萄糖为原料，采用一锅乙醇/水复合溶剂热-后热处理法制备了绣球花状结构MoS₂/C复合材料。考查了乙醇/水复合溶剂的合理组成和MoS₂/C复合材料中碳的合理含量，分别采用SEM和TEM表征了MoS₂/C材料的形貌结构，通过TGA测试和计算了材料中的碳含量。采用循环伏安、恒流充放电和交流阻抗等测试了MoS₂/C复合电极的电化学性能。结果表明，MoS₂/C复合材料拥有多级花球状结构，缓解了MoS₂的团聚，使电极材料的利用率和电化学稳定性显著提高。当V（乙醇）：V（水）为1：2，碳含量为50%时，MoS₂/C复合电极在200 mA·g^-1的电流密度下，充放电循环100次后，可逆容量达到762 mA·h·g^-1。

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	杨子川
	项佳楠
	王霞霞
	田建华
	单忠强

关键词：锂离子电池；负极材料；二硫化钼；多级结构；葡萄糖

Abstract： Flower-like MoS₂/C composite materials were prepared by one-pot ethanol/water composite solvothermal and postsintering method using MoS₂ and glucose as raw materials. The reasonable composition of the ethanol/water composite solvent and the reasonable carbon content in the MoS₂/C composite material were investigated. The morphology of MoS₂/C samples were characterized using SEM and TEM. The carbon content of MoS₂/C materials was tested and calculated using TGA. The electrochemical properties of the MoS₂/C electrodes were investigated by cyclic voltammetry, galvanostatic charge-discharge measurements and electrochemical impedance spectroscopy. The result indicated that MoS₂/C composite materials exhibits hierarchical flower-like structure, which eases the agglomeration of MoS₂ and increases the utilization and electrochemical stability of the electrode active materials. When V_ethanol：V_water=1：2 and the carbon content is 50%,the MoS₂/C electrode delivers a reversible capacity of 762 mA·h·g^-1 at a current density of 200 mA·g^-1 after 100 cycles.

Keywords： lithium ion batteries； negative electrode materials； molybdenum disulfide； hierarchical； glucose

Received 2020-08-06;

Fund:国家重点研发计划（2016YFB0100511）。

Corresponding Authors: 单忠强,E-mail:shanzq@tju.edu.cn。 Email: shanzq@tju.edu.cn

About author: 杨子川(1994-),男,硕士研究生,现从事能源材料方面的研究。

引用本文:

杨子川, 项佳楠, 王霞霞, 田建华, 单忠强.多级结构MoS₂/C复合材料的储锂性能[J]. 化学工业与工程, 2021,38(3): 70-77

Yang Zichuan, Xiang Jianan, Wang Xiaxia, Tian Jianhua, Shan Zhongqiang.Lithium Storage Properties of Hierarchical MoS₂/C Composite Materials[J]. Chemcial Industry and Engineering, 2021,38(3): 70-77

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