Systematic Effect for an Ultralong Cycle Lithium-Sulfur Battery

Feng Wu, Yusheng Ye, Renjie Chen*, Ji Qian, Teng Zhao, Li Li, Wenhui Li

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

117 引用 (Scopus)

摘要

Rechargeable lithium-sulfur (Li-S) batteries are attractive candidates for energy storage devices because they have five times the theoretical energy storage of state-of-the-art Li-ion batteries. The main problems plaguing Li-S batteries are poor cycle life and limited rate capability, caused by the insulating nature of S and the shuttle effect associated with the dissolution of intermediate lithium polysulfides. Here, we report the use of biocell-inspired polydopamine (PD) as a coating agent on both the cathode and separator to address these problems (the "systematic effects"). The PD-modified cathode and separator play key roles in facilitating ion diffusion and keeping the cathode structure stable, leading to uniform lithium deposition and a solid electrolyte interphase. As a result, an ultralong cycle performance of more than 3000 cycles, with a capacity fade of only 0.018% per cycle, was achieved at 2 C. It is believed that the systematic modification of the cathode and separator for Li-S batteries is a new strategy for practical applications.

源语言英语
页(从-至)7431-7439
页数9
期刊Nano Letters
15
11
DOI
出版状态已出版 - 11 11月 2015

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Wu, F., Ye, Y., Chen, R., Qian, J., Zhao, T., Li, L., & Li, W. (2015). Systematic Effect for an Ultralong Cycle Lithium-Sulfur Battery. Nano Letters, 15(11), 7431-7439. https://doi.org/10.1021/acs.nanolett.5b02864