Study on the Cycling Performance of Li4Ti5O)_(12) Electrode in the Ionic Liquid Electrolytes Containing an Additive

摘要

The cycling behavior of Li4Ti5O_(12) electrode in the ionic liquid (IL)-based electrolytes containing 1 -butyl-1-methylpyrroli-dinium bis(trifluoromethanesulfonyl) imide and a small amount of additive (vinylene carbonate, ethylene carbonate, fluoroethylene carbonate) was investigated. The Li4Ti5O_(12) 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 Li4Ti5O_(12) electrode in the presence of vinylene carbonate and ethylene carbonate during cycling.