用于超级电容器的二硫化钼纳米片制备及电化学性能研究

人工晶体学报 ›› 2023, Vol. 52 ›› Issue (4): 663-670.

用于超级电容器的二硫化钼纳米片制备及电化学性能研究

张蕊¹, 王幼琪¹, 沈培智^1,2

1.湖北汽车工业学院材料科学与工程学院,十堰 442002;
2.储能与动力电池湖北省重点实验室,十堰 442002

收稿日期:2023-02-05 出版日期:2023-04-15 发布日期:2023-04-28
通信作者: 沈培智,博士,副教授。E-mail:382744969@qq.com
作者简介:张蕊(1994—),女,内蒙古自治区人,硕士研究生。E-mail:805624819@qq.com
基金资助:
湖北省高等学校优秀中青年科技创新团队计划项目(T201811)

Preparation and Electrochemical Performance of Molybdenum Disulfide Nanosheets for Supercapacitor

ZHANG Rui¹, WANG Youqi¹, SHEN Peizhi^1,2

1. College of Material Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, China;
2. Key Laboratory of Energy Storage and Power Battery of Hubei Province, Shiyan 442002, China

Received:2023-02-05 Online:2023-04-15 Published:2023-04-28

摘要/Abstract

摘要： 以钼硫摩尔比为1:15的钼酸钠和硫脲为原料,采用高温固相法结合球磨的方法制备二硫化钼(MoS₂)纳米片并用于超级电容器。利用热重-差示扫描量热、X射线衍射和扫描电子显微镜对样品的热稳定性、物相及微观形貌进行表征,并采用循环伏安(CV)、恒流充放电(GCD)和电化学阻抗(EIS)等技术测试样品的电化学性能。结果表明:经过750 ℃烧结并于700 r·min^-1转速下球磨10 h所制的MoS₂层数为88层;在充放电电流密度为0.5和1 A·g^-1条件下,该样品比电容分别为82.4和60.9 F·g^-1(优于球磨前的54.6和24.0 F·g^-1),经过2 000次充放电循环,比电容保持率达92.4%。

关键词: 二硫化钼, 高温固相法, 超级电容器, 电化学性能, 比电容, 球磨

Abstract: Nanosheet molybdenum disulfide (MoS₂) electrode materials for supercapacitor were prepared by high-temperature solid-phase method combined with ball milling using sodium molybdate and thiourea in a Mo to S molar ratio of 1:15 as raw materials. The thermal stability, phase structure and microstructure were characterized by thermogravimetric-differential scanning calorimetry, X-ray diffraction and scanning electron microscopy. The eletrochemical properties of the samples were tested by cyclic voltammetry (CV), galvanostatic charge/discharge cycling (GCD) and electrochemical impedance spectroscopy (EIS). The results show that the number of MoS₂ layers prepared by sintering at 750 ℃ and ball milling at 700 r·min^-1 for 10 h is 88. The specific capacitances of the samples are 82.4 and 60.9 F·g^-1 at the current density of 0.5 and 1 A·g^-1, respectively (better than 54.6 and 24.0 F·g^-1 before ball milling). After 2 000 cycles, the specific capacitance retention rate is 92%.

Key words: molybdenum disulfide, high-temperature solid-phase method, supercapacitor, electrochemical performance, specific capacitance, ball milling

中图分类号:

张蕊, 王幼琪, 沈培智. 用于超级电容器的二硫化钼纳米片制备及电化学性能研究[J]. 人工晶体学报, 2023, 52(4): 663-670.

ZHANG Rui, WANG Youqi, SHEN Peizhi. Preparation and Electrochemical Performance of Molybdenum Disulfide Nanosheets for Supercapacitor[J]. Journal of Synthetic Crystals, 2023, 52(4): 663-670.

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