A highly concentrated electrolyte for high-efficiency potassium metal batteries

• Published in: Chemical 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
• Language: English
• Published: England Royal Society of Chemistry 01.02.2021
• Subjects: diethylene glycol; Dimethyl ether; Electrolytes; Pigments; Potassium

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...