自支撑CC/NiS2纳米片中间层制备与锂硫电池性能研究*

doi:10.11985/2022.03.003

电气工程学报 ›› 2022, Vol. 17 ›› Issue (3): 12-18.doi: 10.11985/2022.03.003

• 特邀专栏：储能(储氢)材料、技术、装置及新能源综合应用 • 上一篇下一篇

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自支撑CC/NiS₂纳米片中间层制备与锂硫电池性能研究^*

郝红(), 许俊()

合肥工业大学微电子学院合肥 230009

收稿日期:2021-12-28 修回日期:2022-04-28 出版日期:2022-09-25 发布日期:2022-10-28
通讯作者: 许俊 E-mail:hh111512@163.com;apjunxu@hfut.edu.cn
作者简介:郝红,女,1997年生,硕士研究生。主要研究方向为锂硫电池。E-mail： hh111512@163.com
基金资助:
*国家自然科学基金资助项目(51972092)

Synthesis of Self-supported CC/NiS₂ Nanosheet as an Interlayer and Its Performance Research of Lithium-sulfur Battery

HAO Hong(), XU Jun()

School of Microelectronics, Hefei University of Technology, Hefei 230009

Received:2021-12-28 Revised:2022-04-28 Online:2022-09-25 Published:2022-10-28
Contact: XU Jun E-mail:hh111512@163.com;apjunxu@hfut.edu.cn

摘要/Abstract

摘要：

多硫离子的穿梭效应是限制锂硫电池发展的一个关键问题。通过水热法和进一步的硫化反应合成了自支撑的碳布/二硫化镍纳米片(CC/NiS₂)复合材料,并将其用作锂硫电池中间层来有效抑制多硫离子的穿梭效应。NiS₂纳米片均匀生长在CC表面,具有较大的比表面积和优异的催化活性,能够显著增强对多硫离子的化学吸附能力并促进电化学反应动力学。相比于碳布(CC)中间层电池,CC/NiS₂中间层电池具有明显提高的倍率性能和良好的循环寿命,在0.5C下放电的初始比容量为1 254 mA·h·g^-1(增加52%),在2C下循环300圈后的比容量仍高达928 mA·h·g^-1,容量衰减率仅为每圈0.015%。

关键词: 锂硫电池, CC/NiS₂, 中间层, 催化剂

Abstract:

The shuttle effect of soluble polysulfides is a key issue that limits the development of lithium-sulfur batteries. The self-supported NiS₂ nanosheets modified carbon cloth(CC/NiS₂) is synthesized by a hydrothermal method coupled with post-vulcanization reaction, and used as a multifunctional interlayer of lithium-sulfur battery(LSB) to inhibit the shuttle effect. NiS₂ nanosheets that are vertically grown on the surface of CC have a large specific surface area and excellent catalytic activity, which can significantly enhance the chemisorption capacity of polysulfide species and promote electrochemical reaction kinetics. Compared with the LSB with a carbon cloth(CC) interlayer, the LSB with the CC/NiS₂ interlayer exhibits significantly improved rate performance and outstanding cycling stability. The initial specific capacity discharged at 0.5C has an increase by 52% and reaches 1 254 mA·h·g^-1. The LSB with the CC/NiS₂ interlayer can still maintain a high specific capacity of 928 mA·h·g^-1 after 300 cycles at 2C, and the capacity decay rate is only 0.015% per cycle.

Key words: Lithium-sulfur battery, CC/NiS₂, interlayer, electrocatalyst

中图分类号:

TB34

郝红, 许俊. 自支撑CC/NiS₂纳米片中间层制备与锂硫电池性能研究^*[J]. 电气工程学报, 2022, 17(3): 12-18.

HAO Hong, XU Jun. Synthesis of Self-supported CC/NiS₂ Nanosheet as an Interlayer and Its Performance Research of Lithium-sulfur Battery[J]. Journal of Electrical Engineering, 2022, 17(3): 12-18.

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参考文献 18

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试剂名称	分子式	规格	厂家
六水氯化镍	NiCl₂·6H₂O	分析纯	阿拉丁
六亚甲基四胺	C₆H₁₂N₄	分析纯	阿拉丁
升华硫	S	分析纯	国药集团
商用碳布	CC	HCP330	河森有限公司
浓硝酸	HNO₃	分析纯	国药集团
无水乙醇	C₂H₆O	分析纯	阿拉丁
丙酮	CH₃COCH₃	分析纯	阿拉丁
乙炔黑	AB	ALFA	国药集团
聚偏氟乙烯	PVDF	HSV900	阿拉丁
N-甲基吡咯烷酮	NMP	分析纯	阿拉丁

设备名称	型号	生产厂家
电热恒温鼓风干燥箱	DHG-9070	上海三发有限公司
双温区管式炉	OTF-1200X	合肥科晶有限公司
电子天平	AR1140	OHAUS
磁力搅拌器	DF-101S	巩义市予华仪器
反应釜	50 mL	滨海县正信仪器厂

设备名称	型号	生产厂家
X射线衍射仪	Rigaku D/MAX2500V	荷兰帕纳科
扫描电子显微镜	Sirion200	日本日立公司
紫外可见近红外分光光度计	CARY 5000	安捷伦

自支撑CC/NiS₂纳米片中间层制备与锂硫电池性能研究^*

Synthesis of Self-supported CC/NiS₂ Nanosheet as an Interlayer and Its Performance Research of Lithium-sulfur Battery

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