A new class of electrochemically and thermally stable lithium salts for lithium battery electrolytes. 4: Investigations of the electrochemical oxidation of lithium organoborates

Journal Article · Sat Nov 01 04:00:00 EST 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1838103· OSTI ID:564101

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

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

Synthesis, analysis, and purification of lithium bis[2,2{prime}-biphenyldiolato(2-)-O,O{prime}]borate, lithium bis[salicylato(2-)]-borate, lithium phenolate, and dilithium-2,2{prime}-biphenyldiolate are described. Electrochemical studies show that lithium organoborates are subject to anodic decomposition mechanisms, which depend on their chemical structure. The anodic decomposition of lithium benzenediolatoborates results in the formation of soluble products including chinones, whereas the anodic oxidation of lithium bis[2,2{prime}-biphenyldiolato(2-)-O,O{prime}]borate, lithium bis[salicylato(2-)]borate, and lithium phenolates entails the formation of thin electronically insulating lithium ion-conducting polymer films, preventing further anion decomposition as well as anodic decomposition of solvents which are sensitive to oxidation. These film-forming materials are useful to enlarge the electrochemical window of electrolyte solutions for lithium batteries and electrochemical capacitors.

• Sponsoring Organization: USDOE
• OSTI ID: 564101
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 11 Vol. 144; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
BORATES
ELECTROCHEMISTRY
ELECTROLYTES
LITHIUM COMPOUNDS
METAL-NONMETAL BATTERIES
MOLECULAR STRUCTURE
ORGANOMETALLIC COMPOUNDS
OXIDATION