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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 精细化工全国重点实验室主任，教育部智能材料化工前沿科学中心执行主任，大连理工大学膜科学与技术研究开发中心主任
性别：女
毕业院校：中国科学院大连化物所
学位：博士
所在单位：化工学院
学科：化学工程. 膜科学与技术. 生物医学工程
联系方式：hgaohong@dlut.edu.cn
电子邮箱：hgaohong@dlut.edu.cn
Scalable High-Areal-Capacity Li-S Batteries Enabled by Sandwich-Structured Hierarchically Porous Membranes with Intrinsic Polysulfide Adsorption
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论文类型：期刊论文
发表时间：2021-02-02
发表刊物：NANO LETTERS
卷号：20
期号：9
页面范围：6922-6929
ISSN号：1530-6984
关键字：Li-S batteries; Mentbrane; Porous materials; Phase inversion; CeO2
摘要：The key to realizing practical applications of LiS batteries lies in scalable fabrication of cathode materials with high sulfur-loading and strong binding of lithium polysulfides (LiPSs). We report a scalable CeO2CNT@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 CeOCNT@C membrane can serve as an Al foil-free cathode and an interlayer for LiS batteries. Moreover, CeO2 can immobilize LiPSs and can alleviate its shuttle effect. The LiS 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 mu L mg(1).