이온성 액체를 기반으로 하는 전해질에서 Li4Ti5O12 전극의 사이클 특성에 관한 연구

Abstract

The cycling behavior of Li4Ti5O12 electrode in the ionic liquid (IL)-based electrolytes containing 1-butyl-1-methyl pyrrolidinium bis(trifluoromethanesulfonyl)imide and a small amount of additive (vinylene carbonate, ethylene carbonate, fluoroethylene carbonate) was investigated. The Li4Ti5O12 electrode in the IL electrolyte with an additive exhibited reversible cycling behavior with good capacity retention. Electrochemical impedance spectroscopy and FTIR studies revealed that an electrochemically stable solid electrolyte interphase was formed on the Li4Ti5O12 electrode in the presence of vinylene carbonate and ethylene carbonate during cycling. |The cycling behavior of Li4Ti5O12 electrode in the cross-linked gel polymer electrolyte based on ionic liquid consisting of 1-butyl-1-methylpyrrolidinium bis(trifluoromethane sulfonyl)imide and vinylene carbonate was investigated. The Li4Ti5O12 electrodes in the ionic liquid-based gel polymer electrolytes exhibited reversible cycling behavior with good capacity retention. Cycling data and electrochemical impedance spectroscopy analysis revealed that the optimum content of cross-linking agent to ensure both acceptable initial discharge capacity and good capacity retention was about 8 wt.%.; The cycling behavior of Li4Ti5O12 electrode in the cross-linked gel polymer electrolyte based on ionic liquid consisting of 1-butyl-1-methylpyrrolidinium bis(trifluoromethane sulfonyl)imide and vinylene carbonate was investigated. The Li4Ti5O12 electrodes in the ionic liquid-based gel polymer electrolytes exhibited reversible cycling behavior with good capacity retention. Cycling data and electrochemical impedance spectroscopy analysis revealed that the optimum content of cross-linking agent to ensure both acceptable initial discharge capacity and good capacity retention was about 8 wt.%.