Abstract
Synthesis, analysis, and electrochemical properties of a new lithium salt with an exceptionally large, weakly coordinating anion, lithium bis{1,2‐tetra(trifluoromethyl) ethylenediolato (2−)‐O,O'} borate 
, are described. This salt, whose anion contains 24 fluorine atoms, can be fused at remarkably low temperatures 
and is stable up to 
. The salt has a low conductivity in the molten state, only 
at the melting point of 
due to its quasi‐molecular character. However, its solutions in molecular solvents are extremely conductive. The maximum conductivity of 
in dimethoxyethane (DME) is 
at 
. The electrochemical stability for each of the DME and propylene carbonate solutions is at least 
vs. 
. ©2000 The Electrochemical Society