Fusible orthoborate lithium salt with high conductivity in solutions

Wu Xu; Charles Angell

doi:10.1149/1.1391150

Fusible orthoborate lithium salt with high conductivity in solutions

Wu Xu, Charles Angell

CLAS-NS: Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

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)
Pages (from-to)	366-368
Number of pages	3
Journal	Electrochemical and Solid-State Letters
Volume	3
Issue number	8
DOIs	https://doi.org/10.1149/1.1391150
State	Published - Aug 1 2000

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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title = "Fusible orthoborate lithium salt with high conductivity in solutions",

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.",

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AU - Xu, Wu

AU - Angell, Charles

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N2 - 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.

AB - 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.

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Fusible orthoborate lithium salt with high conductivity in solutions

Abstract

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