微波法制备还原氧化石墨烯及其在锂硫电池中的应用

doi:10.11949/j.issn.0438-1157.20170324

化工学报 ›› 2017, Vol. 68 ›› Issue (11): 4333-4340.DOI: 10.11949/j.issn.0438-1157.20170324

• 材料化学工程与纳米技术 • 上一篇下一篇

微波法制备还原氧化石墨烯及其在锂硫电池中的应用

杨蓉¹, 李兰¹, 王黎晴¹, 付欣¹, 燕映霖², 陈利萍², 路蕾蕾¹

1 西安理工大学理学院, 陕西西安 710048;
2 西安理工大学材料科学与工程学院, 陕西西安 710048

收稿日期:2017-03-30 修回日期:2017-07-27 出版日期:2017-11-05 发布日期:2017-11-05
通讯作者: 杨蓉
基金资助:
国家国际科技合作专项（2015DFR50350）；国家自然科学基金项目（21503166）；陕西省教育厅自然科学专项（15JK1538）；2017年度陕西省科技计划项目（2017GY-160）。

Preparation of reduced graphene oxide by microwave method and its application in lithium-sulfur batteries

YANG Rong¹, LI Lan¹, WANG Liqing¹, FU Xin¹, YAN Yinglin², CHEN Liping², LU Leilei¹

1 School of Science, Xi'an University of Technology, Xi'an 710048, Shaanxi, China;
2 School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, China

Received:2017-03-30 Revised:2017-07-27 Online:2017-11-05 Published:2017-11-05
Supported by:
supported by the International Science Technology Cooperation Program of China(2015DFR50350), the National Natural Science Foundation of China(21503166), the Scientific Research Program Funded by Shaanxi Provincial Education Department(15JK1538) and the Science and Technology Project of Shaanxi Province(2017GY-160).

摘要/Abstract

摘要：

采用改进的Hummers法制备了氧化石墨（GO），对GO进行碳酸浸渍后，通过微波固相法剥离其为少层的还原氧化石墨烯（MRGO）。并采用低温原位化学沉积法制备微波还原氧化石墨烯/纳米硫（MRGO/NS）锂硫电池正极复合材料。通过FT-IR、XRD、SEM、TEM、BET对所制备的MRGO和MRGO/NS的微观结构、形貌等进行表征，采用恒流充放电测试和交流阻抗测试对复合材料的电化学性能进行研究。结果表明，通过微波固相法剥离碳酸浸渍后的GO所制备的MRGO为少层的折扇状还原氧化石墨烯，可为锂硫电池的硫和多硫化物提供足够的容纳空间，从而缓解穿梭效应，提高了电极材料的循环性能和倍率性能。

关键词: 还原氧化石墨烯, 微波法, 纳米硫, 复合材料, 锂硫电池

Abstract:

Oxidized graphite (GO) prepared by modified Hummer's method was immersed in carbonic acid, and consequently stripped to a low grained reduced graphene oxide by microwave solid phase method. This method has simplicity for operator, energy efficiency and time saving, in which experimental conditions are mild with free of toxic strong reducer. As cathode composites for lithium-sulfur battery, reduced graphene oxide/nano-sulfur (MRGO/NS) were prepared by in-situ precipitation reaction at low temperature. The crystal structure and morphology of the MRGO and MRGO/NS composites were characterized by FT-IR, XRD, SEM, TEM and BET, respectively. The electrochemical performance of the composites was determined by galvanostatic charge-discharge test and impedance spectroscopy. The results show that the MRGO obtained from GO immersed in carbonic acid and stripped by microwave solid phase method is folding fan-like graphene, which can provide space to accommodate the active materials for lithium-sulfur batteries, and alleviate the shuttle effect to improve the cycle performance and the C-rate performance of the electrode material.

Key words: reduced graphene oxide, microwave method, nano-sulfur, composites, lithium-sulfur batteries

中图分类号:

O646

杨蓉, 李兰, 王黎晴, 付欣, 燕映霖, 陈利萍, 路蕾蕾. 微波法制备还原氧化石墨烯及其在锂硫电池中的应用[J]. 化工学报, 2017, 68(11): 4333-4340.

YANG Rong, LI Lan, WANG Liqing, FU Xin, YAN Yinglin, CHEN Liping, LU Leilei. Preparation of reduced graphene oxide by microwave method and its application in lithium-sulfur batteries[J]. CIESC Journal, 2017, 68(11): 4333-4340.

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微波法制备还原氧化石墨烯及其在锂硫电池中的应用

Preparation of reduced graphene oxide by microwave method and its application in lithium-sulfur batteries

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