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

YANG Rong; LI Lan; WANG Liqing; FU Xin; YAN Yinglin; CHEN Liping; LU Leilei

doi:10.11949/j.issn.0438-1157.20170324

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

更新时间：2025-12-10

- Preparation of reduced graphene oxide by microwave method and its application in lithium-sulfur batteries
- CIESC Journal Issue 11, Pages: 4333-4340(2017)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170324
  CLC： 646
- Online First：05 November 2017，
  
  Published：05 November 2017
- 稿件说明：
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YANG Rong, LI Lan, WANG Liqing, et al. Preparation of reduced graphene oxide by microwave method and its application in lithium-sulfur batteries[J]. CIESC Journal, 2017, (11): 4333-4340.
DOI：

YANG Rong, LI Lan, WANG Liqing, et al. Preparation of reduced graphene oxide by microwave method and its application in lithium-sulfur batteries[J]. CIESC Journal, 2017, (11): 4333-4340. DOI： 10.11949/j.issn.0438-1157.20170324.

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。

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.

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