A highly concentrated electrolyte for high-efficiency potassium metal batteries
Wenxin Xu, Huwei Wang, Junyang Hu, Haodong Zhang, Biao Zhang, Feiyu Kang, Dengyun Zhai
Abstract
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.
Topics & Concepts
ElectrolyteAnodePotassiumMetalDendrite (mathematics)Materials scienceLithium metalCyclingChemical engineeringInorganic chemistryChemistryMetallurgyElectrodeGeometryMathematicsEngineeringArchaeologyHistoryPhysical chemistryAdvanced Battery Materials and TechnologiesAdvancements in Battery MaterialsThermal Expansion and Ionic Conductivity