4.8 Article

Electrochemical properties of LiCoPO4-thin film electrodes in LiF-based electrolyte solution with anion receptors

Journal

JOURNAL OF POWER SOURCES
Volume 306, Issue -, Pages 753-757

Publisher

ELSEVIER
DOI: 10.1016/j.jpowsour.2015.12.105

Keywords

Anion receptor; LiCoPO4; LiF-based electrolyte solution

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Compatibility of LiF + anion receptors/propylene carbonate (PC) electrolyte solution with high potential positive electrode for lithium-ion batteries was examined by cyclic voltammetry. As anion receptors, tripropyl borate (TPB), tris(pentafluorophenyl) borane (TPFPB), and tris(hexafluoroisopropyl) borate (THFIPB) were used. LiCoPO4 thin-film electrodes were prepared by sol gel method and used as both carbon- and binder-free model electrodes. From cyclic voltammograms, LiCoPO4 showed better cycle ability in 0.1 mol dm(-3) LiF + 0.1 mol dm(-3) THFIPB/PC, however, other anion receptors did not give positive influence. It is indicated that the surface protecting layer from F--THFIPB complex and made LiCoPO4 stable. Electrochemical behavior depending on anion receptors was discussed according to reaction activity of F-. (C) 2015 Elsevier B.V. All rights reserved.

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