Research on the LiODFB Electrolyte’s Electrochemical Performance and Its Compatibility with LTO Electrode

1 mol/L LiODFB(LiPF6) EC+DMC+EMC(1:1:1(wt%)) electrolyte’s thermal stability and corrosivity to the aluminum foil were tested by the electrochemical workstation.Cyclic voltammogram,electrochemical impedance spectroscopy rate and cycle performances of LTO/Li battery were measured.The compatibility between LiFePO4/LTO electrode and electrolyte was studied.Results show that at room temperature and 60℃,the stability of LiODFB electrolyte and its corrosivity to the aluminum foil are superior to that of LiPF6 electrolyte.LTO/Li cells with either LiODFB or LiPF6 for electrolyte have simple REDOX peak,and their first charge-discharge curves have stable charge-discharge platform.The difference battery performance between LiODFB and LiPF6 with LiFePO4/LTO as electrode at 0.5C and 1C rates is not significant at room temperature.LiODFB battery exhibits better cycle performance than LiPF6battery at room temperature and especially at 60℃.