%0 Journal Article
%A Shuai Heng
%A Yan Wang
%A Qunting Qu
%A Ruitian Guo
%A Xiaojian Shan
%A Vincent S Battaglia
%A Gao Liu
%A Honghe Zheng
%B ACS Applied Energy Materials
%D 2019
%G eng
%N 9
%P 6404 - 6416
%R 10.1021/acsaem.9b00972
%T Fluoro-Ether as a Bifunctional Interphase Electrolyte Additive with Graphite/LiNi<sub>0.5</sub>Co <sub>0.2</sub>Mn<sub>0.3</sub>O<sub>2</sub> Full Cell
%V 2
%8 08/2019
%! ACS Appl. Energy Mater.
%X <p><span>In this paper, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) is adopted as a bifunctional electrolyte additive, which is identified to effectively stabilize the surface for both graphite anode and LiNi</span><span>0.5</span><span>Co</span><span>0.2</span><span>Mn</span><span>0.3</span><span>O</span><span>2</span><span>&nbsp;(NCM523) cathode within the graphite/NCM523 full cell. The overall electrochemical performances of the full cell are significantly enhanced with 3 wt % TTE additive in a conventional organic electrolyte. A combination of studies of scanning electronic microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectroscopy show that a uniform, compact, and stable solid electrolyte interphase (SEI) with improved mechanics on the graphite anode and an effective cathode electrolyte interphase (CEI) on the NCM523 cathode is developed. The electron-withdrawing C–F group contributes to the stable and compact surface film, which explains the electrochemical enhancement of the NCM523/graphite full cell.</span></p>