硫在不同碳载体材料中的电化学性能研究

doi:10.13208/j.electrochem.181117

电化学（中英文） ›› 2019, Vol. 25 ›› Issue (6): 749-756. doi: 10.13208/j.electrochem.181117

硫在不同碳载体材料中的电化学性能研究

张波^1,2*，刘佳^1,2，刘晓晨^1,2，李德军^1,2

1. 天津师范大学物理与材料科学学院能源材料工程中心，天津 300387；2. 天津市储能材料表面技术国际联合研究中心，天津 300387

收稿日期:2018-12-04 修回日期:2019-02-18 出版日期:2019-12-28 发布日期:2019-12-28
通讯作者: 张波 E-mail:zhangbo2014@tjnu.edu.cn
基金资助:
天津师范大学人才引进项目（No. 011/5RL132）资助

Electrochemical Properties of Sulfur in Different Carbon Support Materials

ZHANG Bo^1,2*, LIU Jia^1,2, LIU Xiao-chen^1,2, LI De-jun^1,2

1. Energy & Materials Engineering Centre, College of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, China; 2. Tianjin International Joint Research Centre of Surface Technology for Energy Storage Materials, Tianjin 300387, China

Received:2018-12-04 Revised:2019-02-18 Published:2019-12-28 Online:2019-12-28
Contact: ZHANG Bo E-mail:zhangbo2014@tjnu.edu.cn

摘要/Abstract

摘要： 为了探索碳载体材料结构对于硫的电化学性能的影响，本文通过高温固相法将升华硫与石墨烯、导电炭黑、多孔碳等三种不同结构的碳载体材料复合，制备得到硫含量相近的三种硫碳复合材料. 通过电镜扫描、低温氮吸附、X射线衍射等方法，对所制备的硫碳复合材料的结构和硫的分布状态进行了表征和分析. 并进一步对三种复合材料进行了电化学性能测试，结果表明，硫负载到多孔碳中的电化学性能最好，其初始放电比容量达到了1623.2 mA·h·g^-1，循环100周之后，其放电比容量仍能保持在845 mA·h·g^-1. 这主要因为相比于石墨烯的层状结构和导电炭黑的链状结构，多孔碳材料中含有大量的微孔和介孔，负载硫后，与硫分子的接触面积大，活性物质的利用率高，从而提高了硫的电化学性能.

关键词: 锂硫电池, 硫/碳复合材料, 多孔碳材料, 石墨烯, 导电炭黑

Abstract: In order to investigate the effect of carbon structure on electrochemical performance of sulfur/carbon composite in lithium-sulfur battery, in this paper, sublimation sulfur was incorporated into three types of carbon materials, namely, graphene, carbon black and porous carbon. The three sulfur/carbon composites were characterized by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), and X-ray diffraction (XRD) techniques, and their electrochemical performances were also studied. The results showed that the sulfur/porous carbon composite offered an initial discharge capacity of 1623.2 mA·h·g^-1 and remained 845 mA·h·g^-1 after 100 cycles. Compared with graphene and carbon black, the mesopores and micropores in porous carbon improved the utilization of sulfur, contributing to better electrochemical performance of sulfur.

Key words: lithium-sulfur batteries, sulfur/carbon composites, porous carbon materials；graphene, carbon black

中图分类号:

O646

张波, 刘佳, 刘晓晨, 李德军. 硫在不同碳载体材料中的电化学性能研究[J]. 电化学（中英文）, 2019, 25(6): 749-756.

ZHANG Bo, LIU Jia, LIU Xiao-chen, LI De-jun. Electrochemical Properties of Sulfur in Different Carbon Support Materials[J]. Journal of Electrochemistry, 2019, 25(6): 749-756.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.181117

https://electrochem.xmu.edu.cn/CN/Y2019/V25/I6/749

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硫在不同碳载体材料中的电化学性能研究

Electrochemical Properties of Sulfur in Different Carbon Support Materials

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