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Investigation of Glutaric Anhydride as an Electrolyte Additive for Graphite/LiNi0.5Mn0.3Co0.2O2 Full Cells

Peebles, Cameron (<sup>a</sup>Chemical Science and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA ) ; He, Meinan (<sup>a</sup>Chemical Science and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA ) ; Feng, Zhenxing (<sup>c</sup>School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331, USA ) ; Su, Chi-Cheung (<sup>a</sup>Chemical Science and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA ) ; Zeng, Li (<sup>e</sup>Applied Physics Program, Northwestern University, Evanston, Illinois 60208, USA ) ; Bedzyk, Michael J. (<sup>e</sup>Applied Physics Program, Northwestern University, Evanston, Illinois 60208, USA ) ; Fenter, Paul (<sup>a</sup>Chemical Science and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA ) ; Wang, Yan (<sup>b</sup>Mechanical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, USA ) ; Zhang, Zhengcheng (<sup>a</sup>Chemical Science and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA ; ) ; Liao, Chen ;
  • 초록  

    The effects of glutaric anhydride (GA) as an electrolyte additive for graphite/LiNi 0.5 Mn 0.3 Co 0.2 O 2 full cells operating between 3.0–4.4 V were investigated. Linear scan voltammetry (LSV) revealed that GA preferentially oxidized prior to the carbonate-based electrolyte while Li/graphite half cells revealed that GA can suppress electrolyte decomposition on the graphite electrode giving rise to the bifunctional nature of this additive. The addition of both 0.5 and 1.0 wt% of GA into the carbonate-based electrolyte resulted in superior cycling performance compared to the baseline electrolyte as demonstrated by the slight increase in initial capacities and significant increases in capacity retention over 117 cycles at C/3. Electrochemical impedance spectroscopy (EIS) showed that while the overall impedance of the GA containing cells was higher than the cells with the baseline electrolyte the change in impedance between post-formation and post-cycling was smallest for the cells containing GA. Additionally, X-ray photoelectron spectroscopy (XPS) analysis confirmed that GA decomposed on the cathode surface leading to an increase in oxygen-containing species, a decrease in LiF species and a simultaneous increase in Li x PO y F z species.


  • 주제어

    Additive .   Glutaric Anhydride .   Lithium ion batteries .   SEI.  

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