High Temperature Performance Study of Piperidine-based Ionic Liquids in Sodium Ion Batteries
Conventional carbonate electrolytes are less compatible with hard carbon anodes of sodium ion batteries,and the selection of suitable electrolyte additives is an effective method to enhance the electro-chemical performance of hard carbon electrodes.In this paper,piperidine ionic liquid(pp14)containing allyl butyl was synthesized and added to the base electrolyte in different ratios to investigate the effect of piperidine-based ionic liquid on the electrochemical performance of hard carbon cathode at high tempera-ture.The results show that the electrolyte containing 15%v/v pp14 can effectively improve the high-temperature electrochemical stability and rate performance of the HC electrode.The superior electrochemi-cal performance was attributed to the formation of a stable solid electrolyte interface(SEI)during cycling.
Sodium ion batteriesElectrolyte additivesIonic liquidsAllyl butyl containing piperidineHigh temperature performance
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