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. 5.. SEM images of (a) the pristine LiCoO2 and cycled LiCoO2 electrodes in (b) the base and (c) 0.50 % TFPN containing electrolytes. TEM images of cycled LiCoO2 electrodes using (d) 1 mol L-1 LiPF6/EC + DEC (1/1, v/v) solutions with no additive and (e) 0.50 wt% TFPN.