Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1292394 | Journal of Power Sources | 2016 | 5 Pages |
•Electrochemical properties of LiCoPO4 thin-film electrodes were investigated.•LiF-based electrolyte solutions containing anion receptors were used.•Electrochemical properties of LiCoPO4 were depended on the kind of anion receptors.
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 cycleability 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−.