2-(Trifluoroacetyl) thiophene as an electrolyte additive for high-voltage lithium-ion batteries using LiCoO2 cathode
Yi Suna, Jian Huanga, Hongfa Xianga,*(), Xin Lianga, Yuezhan Fengb, Yan Yuc,*()

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Fig. 4.. Electrochemical impedance spectra (EIS) of the LiCoO2/Li coil cells at the (a) 20th, (b) 100th and fitting curve using the equivalent circuit, with 1 mol L-1 LiPF6/EC + DEC (1/1, v/v) solutions with no additive and 0.50 wt% TFPN.