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[1]王宁,许寒雪,万永华,等.硫/氧化石墨烯锂硫电池电极材料的制备与性能表征[J].南京工业大学学报(自然科学版),2016,38(04):17-20.[doi:10.3969/j.issn.1671-7627.2016.04.004]
 WANG Ning,XU Hanxue,WAN Yonghua,et al.Synthesis and characterization of H-GO/S composites as cathode materials for lithium/sulfur batteries[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(04):17-20.[doi:10.3969/j.issn.1671-7627.2016.04.004]
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硫/氧化石墨烯锂硫电池电极材料的制备与性能表征()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年04期
页码:
17-20
栏目:
出版日期:
2016-07-10

文章信息/Info

Title:
Synthesis and characterization of H-GO/S composites as cathode materials for lithium/sulfur batteries
文章编号:
1671-7627(2016)04-0017-04
作者:
王宁许寒雪万永华刘晓敏杨晖沈晓冬
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
WANG NingXU HanxueWAN YonghuaLIU XiaominYANG HuiSHEN Xiaodong
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
锂硫电池 正极材料 热复合 H-GO/S复合材料 循环稳定性
Keywords:
lithium/sulfur batteries cathode materials melt-diffusion H-GO/S composite stable cycle performance
分类号:
TM911
DOI:
10.3969/j.issn.1671-7627.2016.04.004
文献标志码:
A
摘要:
以改进Hummers法制备的氧化石墨烯作为载体,运用简单化学沉积并加以热处理制备硫/氧化石墨烯(H-GO/S)复合材料。采用傅里叶红外光谱仪(FT-IR)、X线衍射仪(XRD)、透射电子显微镜(TEM)、热质量分析仪(TGA)等表征手段对H-GO/S复合材料的微观结构、形貌和组成进行表征; 同时运用恒流充放电和循环伏安对电极材料进行电化学性能测试。在0.1 C倍率下H-GO/S复合材料首次放电比容量达1 060 mA·h/g,20次循环之后,放电比容量趋向稳定,160次循环后放电比容量仍可达到620 mA·h/g,衰减率仅为0.068%,库伦效率始终保持在97%以上。以上结果表明H-GO/S复合材料具有优良的循环稳定性以及比较高的库伦效率。
Abstract:
The graphene oxide(GO)was synthesised by promoted Hummers process. S deposed on GO through an uncomplicated chemical reaction, then heat treated the assynthesized samples to prepare H-GO/S composites. The microstructure and the morphology of the composited electrode were characterized by X-ray diffraction(XRD),transmission electron microscope(TEM)and thermogravimetric analysis(TGA).The electrochemical properties of the electrodes were investigated by galvanostatic charge-discharge and cyclic voltammetry(CV).The H-GO/S composited electrodes manifested a high initial capacity(1 060 mA·h/g,0.1 C)and excellent capacity stability after 20 cycles.The discharge capacity could retain 620 mA·h/g even after 160 cycles,corresponding to an extremely low capacity decay rate of 0.068% per cycle.The average coulombic efficiency was above 97%. Results showed that the H-GO/S composited electrodes had excellent cyclability and high coulumbic efficiency.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-04-06
基金项目:江苏省自然科学基金重点资助项目(BK2011030); 江苏省教育厅重点项目(KJA430006); 江苏高校优势学科建设工程
作者简介:王宁(1990—),男,江苏盐城人,硕士,主要研究方向为锂硫电池; 杨晖(联系人),教授,E-mail:yanghui@njtech.edu.cn.
引用本文:王宁,许寒雪,万永华,等.硫/氧化石墨烯锂硫电池电极材料的制备与性能表征[J].南京工业大学学报(自然科学版),2016,38(4):17-20..
更新日期/Last Update: 2016-07-10