分离器(采油)
乙炔
原位
吸附
多硫化物
化学
材料科学
化学工程
复合数
聚丙烯
纳米技术
电极
有机化学
复合材料
电解质
物理化学
工程类
物理
热力学
作者
Jing Wang,Kun Wang,Ze Yang,Xiaodong Li,Juan Gao,Jianjiang He,Ning Wang,Huanlei Wang,Yanliang Zhang
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-12-02
卷期号:8 (4): 1741-1750
被引量:16
标识
DOI:10.1021/acssuschemeng.9b04970
摘要
Lithium–sulfur batteries have been considered as the most competitive candidates for next generation of high energy density batteries. However, industrial application of such devices is still impeded by the transport of soluble lithium polysulfides (PSs). Herein, we reported the in situ preparation of graphdiyne nanosheets modulated on a commercial polypropylene separator to restrain the shuttle effect of PSs by enhanced physical adsorption and chemical binding with an in situ formed composite fence because of the strong interaction between the uniformly distributed acetylene bond and PSs. As a result, the batteries using a graphdiyne-modulated separator could deliver a higher initial capacity of more than 1262 mA h g–1 at 0.1 C and a substantial capacity of 412 mA h g–1 at 1 C after 500 cycles. In-depth analysis reveals that the facile strategy of the modulated separator with a rich acetylene bond and intermolecular pores is effective to enhance the physical absorption and chemical binding ability of PSs, which act as an in situ formed barrier layer to block the PSs for achieving high-energy batteries.
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