期刊
CHEMSUSCHEM
卷 11, 期 18, 页码 3345-3351出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201800871
关键词
batteries; ion selectivity; lithium-sulfur; prussian blue; separators
资金
- National Natural Science Foundation of China [21646012]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2016DX08]
- China Postdoctoral Science Foundation [2016M600253, 2017T100246]
- Postdoctoral Foundation of Heilongjiang Province
- Fundamental Research Funds for the Central Universities [HIT. NSRIF. 201836]
Application of Li-S batteries has been restricted because of their major problem, that is, shuttling of soluble polysulfides between electrodes, which results in serious capacity fading. For the development of high-performance Li-S batteries, we first time utilize a simple growth method to introduce a Prussian blue (PB)-modified Celgard separator as an ion-selective membrane. The unique structure of PB could effectively suppress the shuttle of polysulfides but scarcely affect the transfer ability of lithium ions, which is beneficial to achieve high sulfur conversion efficiency and capacity retention. The Li-S battery with PB-modified Celgard separator has an average capacity decay of only 0.03% per cycle at 1C after 1000cycles.
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