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现代化工  2020, Vol. 40 Issue (1): 150-154,160    DOI: 10.16606/j.cnki.issn0253-4320.2020.01.032
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
高还原氧化石墨烯隔膜应用于锂硫电池的研究
张康明1,2, 戴丽琴2, 谢莉婧2, 苏方远2, 刘卓2, 陈志文1, 陈成猛2
1. 上海大学环境与化学工程学院, 上海 200444;
2. 中国科学院山西煤炭化学研究所炭材料重点实验室, 山西 太原 030001
Highly-reduced graphene oxide separator for lithium-sulfur batteries
ZHANG Kang-ming1,2, DAI Li-qin2, XIE Li-jing2, SU Fang-yuan2, LIU Zhuo2, CHEN Zhi-wen1, CHEN Cheng-meng2
1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;
2. Key Laboratory of Carbon Materials, Institute of Coal Chemistry of Chinese Academy of Sciences, Taiyuan 030001, China
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摘要 锂硫电池作为高能量密度的二次电池存在硫的低导电性和多硫化物的穿梭效应等问题。通过制备高还原度的氧化石墨烯隔膜,并将其应用于锂硫电池。利用石墨烯片层形成的空间位阻和小介孔结构,可阻挡多硫化物的迁移以及其高导电性可减弱电池极化。在0.2 C下,采用高还原氧化石墨烯隔膜的锂硫电池初始比容量达到了1 143.2 mAh/g,经过100次循环后容量保持率为74.25%。此外,在2 C下仍有626.1 mAh/g的比容量。表明高还原氧化石墨烯隔膜可以有效提升锂硫电池的电化学性能,体现出卓越的长循环稳定性和杰出的倍率性能。
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张康明
戴丽琴
谢莉婧
苏方远
刘卓
陈志文
陈成猛
关键词:  锂硫电池  高还原氧化石墨烯  隔膜  空间位阻  高导电性    
Abstract: Lithium-sulfur (Li-S) battery is expected to be widely applied as a secondary battery with a high energy density.However,it has some problems such as low conductivity of sulfur and shuttle effect of polysulfides,which limiting its development and application.Highly-reduced graphene oxide (HrGO) separator are prepared and applied to Li-S batteries.The migration of polysulfides can be blocked by the space steric hindrance and small mesoporous structure formed by graphene sheets,and graphene's high conductivity can reduce the polarization of battery.Under 0.2 C,the initial specific capacity of the Li-S battery with HrGO separator reaches 1 143.2 mAh·g-1,and the capacity retention rate maintains 74.25% after 100 cycles.Under 2 C,in addition,the battery has still a specific capacity of 626.1 mAh·g-1.The results show that HrGO separator can effectively improve the electrochemical properties of Li-S battery,presenting the excellent long cycle stability and prominent rate performance.
Key words:  lithium-sulfur battery    highly-reduced graphene oxide    separator    space steric hindrance    high conductivity
收稿日期:  2019-03-08      修回日期:  2019-11-19           出版日期:  2020-01-20
TM912  
基金资助: 山西省重大专项(MC2016-8,MC2016-4);省青年科技研究基金(201601D021061)
通讯作者:  陈成猛(1985-),男,博士,研究员,研究方向为新型炭材料,通讯联系人,ccm@sxicc.ac.cn。    E-mail:  ccm@sxicc.ac.cn
作者简介:  张康明(1994-),男,硕士研究生,研究方向为锂硫电池中功能化隔膜,1242691489@qq.com
引用本文:    
张康明, 戴丽琴, 谢莉婧, 苏方远, 刘卓, 陈志文, 陈成猛. 高还原氧化石墨烯隔膜应用于锂硫电池的研究[J]. 现代化工, 2020, 40(1): 150-154,160.
ZHANG Kang-ming, DAI Li-qin, XIE Li-jing, SU Fang-yuan, LIU Zhuo, CHEN Zhi-wen, CHEN Cheng-meng. Highly-reduced graphene oxide separator for lithium-sulfur batteries. Modern Chemical Industry, 2020, 40(1): 150-154,160.
链接本文:  
https://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2020.01.032  或          https://www.xdhg.com.cn/CN/Y2020/V40/I1/150
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