For the first time, lithium fluoride has been successfully used as a salt in a novel, highly conductive, nonaqueous electrolyte in a rechargeable cell. This was accomplished by using with a new boron‐based anion receptor additive in a 1,2‐dimethoxyethane (DME) solvent. The additive increases the solubility of in DME to as high as and results in a conductivity of at . On a glassy carbon working electrode, the electrolyte was electrochemically stable up to . The upper voltage limit is due to the solvent and not the additive. The feasibility of using the electrolyte in a rechargeable lithium battery was studied. A test cell with a cathode and the new electrolyte was cycled 51 times between 3.5 and . The initial capacity was almost identical to that found in a cell with a commercial electrolyte [ in propylene carbonate/ethylene carbonate/dimethyl carbonate (1:1:3)]. With the new electrolyte, there was some capacity fade and an increase in cell polarization with cycling due to decomposition of the solvent. New, more stable solvents with similar solubilities for the additive are needed.
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Xiao‐Guang Sun (1999) studied this question.