Journal
CHEMICAL COMMUNICATIONS
Volume 57, Issue 8, Pages 1034-1037Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc07266d
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Funding
- National Natural Science Foundation of China [51772167, 52072206]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01N111]
- Shenzhen Basic Research Project [JCYJ20170412171311288, JCYJ20170817162443934]
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A highly concentrated electrolyte of 4 M potassium bis(fluorosulfonyl)imide in diethylene glycol dimethyl ether was reported, enabling stable cycling of K metal anodes with high CE and excellent capacity retention parallel to potassium Prussian blue 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 500 cycles) of K parallel to potassium Prussian blue (KPB) batteries.
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