期刊
ACS NANO
卷 15, 期 8, 页码 13436-13443出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c03876
关键词
Janus separator; single-atom zinc; metal-organic framework; shuttle effect; lithium dendrite
类别
资金
- National Natural Science Foundation of P. R. China [22001082]
- Guangdong Basic and Applied Basic Research Fund Project [2019B1515120027]
- Research and Development (R&D) Projects in Key Areas of Guangdong Province [2020B0101028005]
- Guangdong Natural Science Foundation Project [2019A1515010841]
- Guangdong Province International Science and Technology Cooperation Project [2019A050510038]
- Guangzhou Science and Technology Association Young Talents Promotion Project [X20210201043]
- Basic and Applied Basic Research Projects of Guangzhou [202102020624]
This study presents a Janus separator prepared with anionic metal-organic framework and single-atom zinc catalyst, which effectively inhibits the dendrite growth and shuttle effect of Li-S batteries. The results show stable cyclic performance and outstanding protection capability, making it suitable for various types of Li-S or Li-Se batteries.
The two key problems for the industrialization of Li-S batteries are the dendrite growth of lithium anode and the shuttle effect of lithium polysulfides (LiPSs). Herein, we report the Janus separator prepared by coating anionic Bio-MOF-100 and its derived single-atom zinc catalyst on each side of the Celgard separator. The anionic metal-organic framework (MOF) coating induces the uniform and rapid deposition of lithium ions, while its derived single-atom zinc catalyzes the rapid transformation of LiPSs, thus inhibiting the lithium dendrite and shuttle effect simultaneously. Consequently, compared with other reported Li-S batteries assembled with single-atomic catalysts as separator coatings, our SAZ-AF Janus separator showed stable cyclic performance (0.05% capacity decay rate at 2 C with 1000 cycles), outstanding performance in protecting lithium anode (steady cycle 2800 h at 10 mAh cm(-2)), and equally excellent cycling performance in Li-SeS2 or Li-Se batteries. Our work provides an effective separator coating design to inhibit shuttle effect and lithium dendrite.
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