High anodic stability of a new electrolyte solvent: Unsymmetric noncyclic aliphatic sulfone

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Abstract

To improve the anodic stability of ambient temperature electrolytes, a nontoxic solvent based on the sulfone polar group has been synthesized and evaluated in the presence of high potential cathode materials. Solutions of high stability salts such as LiClO 4 and Li imide in this solvent, withstand 5.8 V vs. Li +/Li before onset of oxidation, defined by a stringent criterion, even in the presence of high surface area electrodes such as activated charcoal on Pt. Reversible Li deposition and stripping is observed at negative potentials. This means not only that a wide range of overcharge protection is available for high voltage cathodes in current use, but also that exotic cathodes accepting electrons up to 5.5 V from Li +/Li may now be incorporated in rechargeable lithium cells.

Original languageEnglish (US)
JournalJournal of the Electrochemical Society
Volume145
Issue number4
StatePublished - Apr 1998

Fingerprint

Sulfones
sulfones
Electrolytes
Cathodes
cathodes
electrolytes
Imides
charcoal
Charcoal
imides
stripping
Lithium
Activated carbon
ambient temperature
high voltages
Salts
lithium
salts
Oxidation
oxidation

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

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T1 - High anodic stability of a new electrolyte solvent

T2 - Unsymmetric noncyclic aliphatic sulfone

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AB - To improve the anodic stability of ambient temperature electrolytes, a nontoxic solvent based on the sulfone polar group has been synthesized and evaluated in the presence of high potential cathode materials. Solutions of high stability salts such as LiClO 4 and Li imide in this solvent, withstand 5.8 V vs. Li +/Li before onset of oxidation, defined by a stringent criterion, even in the presence of high surface area electrodes such as activated charcoal on Pt. Reversible Li deposition and stripping is observed at negative potentials. This means not only that a wide range of overcharge protection is available for high voltage cathodes in current use, but also that exotic cathodes accepting electrons up to 5.5 V from Li +/Li may now be incorporated in rechargeable lithium cells.

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