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 {LiB[OC(CF3)2]4}, are described. This salt, whose anion contains 24 fluorine atoms, can be fused at remarkably low temperatures (120 °C) and is stable up to 280 °C. The salt has a low conductivity in the molten state, only 7.1×10-6 S cm-1 at the melting point of 120 °C due to its quasi-molecular character. However, its solutions in molecular solvents are extremely conductive. The maximum conductivity of LiB[OC(CF3)2]4 in dimethoxyethane (DME) is 11.1×10-3 S cm-1 at 25 °C. The electrochemical stability for each of the DME and propylene carbonate solutions is at least 4.5 V vs. Li+/Li.
Original language | English (US) |
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Pages (from-to) | 366-368 |
Number of pages | 3 |
Journal | Electrochemical and Solid-State Letters |
Volume | 3 |
Issue number | 8 |
DOIs | |
State | Published - Aug 1 2000 |
ASJC Scopus subject areas
- Chemical Engineering(all)
- Materials Science(all)
- Physical and Theoretical Chemistry
- Electrochemistry
- Electrical and Electronic Engineering