多硫化物
材料科学
阴极
化学工程
纳米孔
膜
阳极
多孔性
锂(药物)
制作
纳米技术
电解质
复合材料
化学
电极
物理化学
病理
内分泌学
工程类
替代医学
医学
生物化学
作者
Xiangcun Li,Yue Zhang,Zhen Wang,Yang Liu,Yu Ding,Gaohong He,Xiaobin Jiang,Wu Xiao,Guihua Yu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2020-08-24
卷期号:20 (9): 6922-6929
被引量:44
标识
DOI:10.1021/acs.nanolett.0c03088
摘要
The key to realizing practical applications of Li–S batteries lies in scalable fabrication of cathode materials with high sulfur-loading and strong binding of lithium polysulfides (LiPSs). We report a scalable CeO2–CNT@C porous membrane with a large porosity of 90%. Introducing CNTs is critical to increase the porosity and construct porous networks with CNTs as the skeleton and CeO2-doped carbon as the shell. The macropores can improve the transport of Li+ and electrolyte, while the porous networks possess high polysulfide-adsorbing and electron-transferring ability. The CeO2–CNT@C membrane can serve as an Al foil-free cathode and an interlayer for Li–S batteries. Moreover, CeO2 can immobilize LiPSs and can alleviate its shuttle effect. The Li–S batteries with a sulfur loading of 6.2 mg cm–2 deliver a capacity of 847 mA h g–1 after 100 cycles, showing a high areal capacity of 5.25 mA h cm–2 at a low electrolyte/sulfur ratio of 5.2 μL mg–1.
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