期刊
JOURNAL OF MEMBRANE SCIENCE
卷 592, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2019.117349
关键词
Lithium-sulfur batteries; Carbonized silk nanofiber; Cathode interlayer; Anode interlayer; Electrospinning
资金
- Zhejiang Provincial Natural Science Foundation of China [LY17E030008, LY12E03005]
- China Scholarship Council [201508330152]
- Dyeing and Finishing Institute of College of Materials and Textiles, Zhejiang SciTech University
- Suzhou Shi Yuanfan Dianqi Co., LTD. [17010291-J]
Problems regarding the low conductivity of sulfur, dissolution and diffusion of polysulfides in liquid electrolytes, and corrosion of the lithium interface hinder the advancement of lithium-sulfur batteries for next-generation energy storage. The development of a new cell configuration is a simple and effective method of resolving the above problems. Here, we use electrospun carbonized silk nanofiber film as the cathode-and anode-interlayer for lithium-sulfur batteries. The interwoven network and microprous structure of interlayer improves the sulfur cathode conductivity and curbs the shuttle effect; the anode-interlayer acts as a protective layer to reduce the lithium corrosion. Having a sulfur loading of 2.0 mg cm(-2), the sulfur cathode-interlayer combined with the lithium anode-interlayer shows a reversible capacity of 799 mA h g(-1) after 200 cycles at 0.2 C with 0.018% average capacity loss per cycle. At a rate of 1.0 C, the discharge capacity remains at 655 mA h g(-1) after 500 cycles with a Coulombic efficiency of 97.3%. This new cell configuration with a double-interlayer based on carbonized silk nanofiber opens up another path for advanced lithium-sulfur batteries to deal with a variety of challenges.
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