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Benzotriazole as an electrolyte additive on lithium-ion batteries performance

  • Hamenu, Louis (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Madzvamuse, Alfred (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Mohammed, Latifatu (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Lee, Yong Min (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Ko, Jang Myoun (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Bon, Chris Yeajoon (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Kim, Sang Jun (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Cho, Won Il (Center for Energy Convergence, Korea Institute of Science and Technology) ;
  • Baek, Yong Gu (AlphaChem Co., Ltd.) ;
  • Park, Jongwook (Department of Chemical Engineering, Kyunghee University)
  • Received : 2016.12.05
  • Accepted : 2017.04.22
  • Published : 2017.09.25

Abstract

Liquid electrolyte consisting of 1 M LiPF6 in ethylene carbonate (EC)/dimethyl carbonate (DMC) and 0.1 wt% benzotriazole (BzTz) is studied in $LiCoO_2$//graphite battery system at room temperature. Benzotriazole addition introduces excellent electrochemical stability (5.6 V vs Li) and good ionic conductivity properties at room temperature. Also, this electrolyte shows good cycling performance and better discharge capacities at high C-rates relative to the pristine electrolyte. Furthermore, the additive allows the formation of a good solid electrolyte interphase (SEI) per cyclic voltammetry (CV) examination. These specialized properties make this liquid electrolyte ideal for high power and high voltage applications.

Acknowledgement

Supported by : Korean Ministry of Trade, Industry & Energy, Korea Institute of Energy Technology Evaluation and Planning (KETEP)