Fluorinated ether electrolyte with controlled solvation structure for high voltage lithium metal batteries

Abstract The development of new solvents is imperative in lithium metal batteries due to the incompatibility of conventional carbonate and narrow electrochemical windows of ether-based electrolytes. Whereas the fluorinated ethers showed improved electrochemical stabilities, they can hardly solvate lithium ions. Thus, the challenge in electrolyte chemistry is to combine the high voltage stability of fluorinated ethers with high lithium ion solvation ability of ethers in a single molecule. Herein, we report a new solvent, 2,2-dimethoxy-4-(trifluoromethyl)-1,3-dioxolane (DTDL), combining a cyclic fluorinated ether with a linear ether segment to simultaneously achieve high voltage stability and tune lithium ion…

• NS
  National Science Foundation
• NR
  National Research Foundation
• ÉP
  École Polytechnique Fédérale de Lausanne
• SN
  Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

  Awards: 200021-, 200021-188572, 188572, 200021
• SN
  Seoul National University
• MO
  Ministry of Trade, Industry and Energy

  Award: 20012341
• NR
  National Research Foundation of Korea

  Awards: NRF-2018M1A2A2063340, NRF-2021R1A2B5B03001956, 2018M1A2A2063340, 2021R1A2B5B03001956
• IO
  Institute of Engineering Research, Seoul National University