A highly concentrated electrolyte for high-efficiency potassium metal batteries

We report a highly concentrated electrolyte consisting of 4 M potassium bis(fluorosulfonyl)imide (KFSI) in diethylene glycol dimethyl ether (DEGDME). This new electrolyte enables stable cycling of K metal anodes with a high CE (over 98% over 400 cycles), and excellent capacity retention (99.7% after...

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Published inChemical communications (Cambridge, England) Vol. 57; no. 8; pp. 134 - 137
Main Authors Xu, Wenxin, Wang, Huwei, Hu, Junyang, Zhang, Haodong, Zhang, Biao, Kang, Feiyu, Zhai, Dengyun
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 01.02.2021
Subjects
diethylene glycol
Dimethyl ether
Electrolytes
Pigments
Potassium
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Summary:We report a highly concentrated electrolyte consisting of 4 M potassium bis(fluorosulfonyl)imide (KFSI) in diethylene glycol dimethyl ether (DEGDME). This new electrolyte enables stable cycling of K metal anodes with a high CE (over 98% over 400 cycles), and excellent capacity retention (99.7% after 500 cycles) of K||potassium Prussian blue (KPB) batteries. A highly concentrated electrolyte enables dendrite-free cycling of K metal anodes with a high CE (over 98% over 400 cycles).
Bibliography:Electronic supplementary information (ESI) available. See DOI
10.1039/d0cc07266d
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ISSN:1359-7345
1364-548X
1364-548X
DOI:10.1039/d0cc07266d