A new class of electrochemically and thermally stable lithium salts for lithium battery electrolytes. 1: Synthesis and properties of lithium bis[1,2-benzenediolato(2-)-O,O{prime}]borate

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2050048· OSTI ID:110113

Barthel, J; Wuehr, M; Buestrich, R; Gores, H J ^[1]

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1. Univ. Regensburg (Germany). Inst. fuer Theoretische und Physikalische Chemie

Disclosed is a new class of nontoxic thermally, chemically, and electrochemically stable, inexpensive lithium salts based on a chelate complex anion of boron with aromatic or aliphatic diols or carboxylic acids. The synthesis, purification and analysis of the first member of this class, lithium bis[1,2-benzenediolato(2-)-O,O{prime}]borate (Li[B(C{sub 6}H{sub 4}O{sub 2}){sub 2}]) is described and some results are given from electrochemical experiments of its solution in various aprotic solvents. The voltage window of Li[B(C{sub 6}H{sub 4}O{sub 2}){sub 2}] based solutions is limited by the oxidation of the borate at about 3.6 V vs. lithium. Lithium can be cycled in solutions of lithium bis[1,2-benzenediolato(2-)-O,O{prime}]borate based on different aprotic solvents. Cycling efficiencies depend strongly on the solvents used, but scarcely on contact times of the solution with lithium, or on the use of mixed electrolytes (Li[B(C{sub 6}H{sub 4}O{sub 2}){sub 2}]/[N(CH{sub 3}){sub 4}][B(C{sub 6}H{sub 4}O{sub 2}){sub 2}]).

• Sponsoring Organization: USDOE
• OSTI ID: 110113
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 8 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
BORATES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
DECOMPOSITION
ELECTRIC BATTERIES
ELECTRICAL PROPERTIES
ELECTROLYTES
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
STABILITY