How Ethylene Carbonate/γ-Butyrolactone Mixtures Affect BF4−Intercalation into Graphite Electrode

In organic electrolyte solution, the intercalation of anions into graphite electrode bears enormous influence of the anion solvation. Traditional carbonate solvents inevitably have some shortcomings, therefore multi-solvent electrolyte solutions are more convenient and flexible in solving practical problems, but the anion storage mechanism is hard to be discerned. In this paper, the intercalation of tetrafluoroborate (BF4−) anions into graphite electrode from ethylene carbonate (EC)/γ-butyrolactone (GBL) binary solutions are studied through several ex situ and in situ electrochemical methods. The electrochemical intercalation process of BF4−into graphite electrode from EC/GBL binary solutions is deduced.