介孔碳/硫复合材料(CxSy)与室温钠硫电池

doi:10.13208/j.electrochem.130363

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (6): 544-549. doi: 10.13208/j.electrochem.130363

• 锂离子电池近期研究专辑 (厦门大学杨勇教授主编) • 上一篇下一篇

介孔碳/硫复合材料(C_xS_y)与室温钠硫电池

赵庆，胡宇翔，张凯，王利江，陶占良，陈军^*

南开大学先进能源材料化学教育部重点实验室，天津 300071

收稿日期:2013-06-26 修回日期:2013-07-17 出版日期:2013-12-28 发布日期:2013-12-23
通讯作者: 陈军 E-mail:chenabc@nankai.edu.cn
基金资助:
国家纳米重大科学研究计划（No. 2011CB935900）和国家自然科学基金项目（No. 21231005）资助

CMK-3/Sulfur Composite (C_xS_y) and Room-Temperature Na/S Battery

ZHAO Qing, HU Yu-Xiang, ZHANG Kai, WANG Li-Jiang, TAO Zhan-Liang, CHEN Jun^*

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, No. 94 Weijin Road, Tianjin 300071, China

Received:2013-06-26 Revised:2013-07-17 Published:2013-12-28 Online:2013-12-23
Contact: CHEN Jun E-mail:chenabc@nankai.edu.cn

摘要/Abstract

摘要： 通过熔融扩散法合成了一系列不同含硫量的有序介孔碳（CMK-3）/硫复合材料（C_xS_y）. 采用X射线衍射（XRD）、拉曼光谱（Raman）、比表面积测定仪（BET）、扫描电镜（SEM）、透射电镜（TEM）分析、表征和观察样品. 将复合材料组装成钠硫电池，室温下测试电化学性能. 循环伏安（CV）曲线结果表明，室温钠硫电池在1.61 V处有一个还原峰，对应于Na₂S_x(x = 2 ~ 5)的形成；在1.82 V和1.95 V分别有一个氧化峰，对应于Na₂S_x(x = 2 ~ 5)的分解. 50 wt%硫含量（C₁S₁）电极0.05C（1C=558 mA·g^-1）倍率首周放电容量500 mAh·g^-1，50周期循环比容量为305.6 mAh·g^-1. 交流阻抗数据拟合计算其表观活化能为21.83 kJ·mol^-1. 本研究可为室温钠硫电池多孔电极材料的研究提供一定的指导作用.

关键词: 有序介孔碳, CMK-3/硫复合材料, 室温, 钠硫电池

Abstract: A series of ordered mesoporous carbon (CMK-3)/sulfur composite (C_xS_y) with different sulfur contents were synthesized via a melt-diffusion method. XRD, Raman, BET, SEM, and TEM techniques were used to characterize the structure and morphology of the as-prepared composite. The electrochemical performance of CMK-3/sulfur composite as the electrode of Na/S battery was tested at room temperature. Cyclic voltammograms show that one obvious reduction peak was located at about 1.61V, which is corresponding to the formation of Na₂S_x (x=2~5), while two oxidation peaks were displayed at about 1.82V and 1.95V, which are belonging to the decomposition of Na₂S_x(x=2~5). When the sulfur content in CMK-3/sulfur composite was 50 wt% (C₁S₁), the discharge capacity reached 500 mAh·g^-1 under 0.05C (1C=558 mAh·g^-1) rate in the first cycle and the capacity became 305.6 mAh·g?1 after 50 cycles. From the result of EIS tested at about 1.6 V under different temperatures, the activation energy was calculated to be 21.83 kJ·mol^-1. This result provides the basis for further study of porous electrode materials for room-temperature Na/S battery.

Key words: ordered mesoporous carbon, CMK-3/S composite, room-temperature, Na/S battery

中图分类号:

O646
TM911

赵庆，胡宇翔，张凯，王利江，陶占良，陈军*. 介孔碳/硫复合材料(C_xS_y)与室温钠硫电池[J]. 电化学（中英文）, 2013, 19(6): 544-549.

ZHAO Qing, HU Yu-Xiang, ZHANG Kai, WANG Li-Jiang, TAO Zhan-Liang, CHEN Jun*. CMK-3/Sulfur Composite (C_xS_y) and Room-Temperature Na/S Battery[J]. Journal of Electrochemistry, 2013, 19(6): 544-549.

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介孔碳/硫复合材料(C_xS_y)与室温钠硫电池

CMK-3/Sulfur Composite (C_xS_y) and Room-Temperature Na/S Battery

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介孔碳/硫复合材料(CxSy)与室温钠硫电池

CMK-3/Sulfur Composite (CxSy) and Room-Temperature Na/S Battery

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介孔碳/硫复合材料(C_xS_y)与室温钠硫电池

CMK-3/Sulfur Composite (C_xS_y) and Room-Temperature Na/S Battery