The Effect of 15-Crown-5 and Benzo-15-Crown-5 on the Performance of Lithium Batteries in LiPF6 and LiN(CF3SO2)2 Electrolytes

A. A. SlesarenkoA. A. Slesarenko, G. Z. TulibaevaG. Z. Tulibaeva, G. R. BaymuratovaG. R. Baymuratova, A. V. YudinaA. V. Yudina, A. F. ShestakovA. F. Shestakov, O. V. YarmolenkoO. V. Yarmolenko
Российский электрохимический журнал
Abstract / Full Text

The reversibility of electrode reactions in Li//LiFePO4 cells with two liquid electrolyte compositions modified by 15-crown-5 and benzo-15-crown-5 is tested. By cycling Li//LiFePO4 batteries, it is shown that crown ethers enhance the stability of discharge capacity and Coulomb efficiency in both electrolytes: 1 М LiPF6 in ethylene carbonate/dimethyl carbonate (1 : 1) and 1 M LiN(CF3SO2)2 in dioxolane/dimethoxyethane (2 : 1), which differ by their ability to form solid-electrolyte layers on the electrode surface. The energy of Li+-ion transport through the layer of crown ethers under study is modeled by quantum-chemical methods. The conclusions of quantum chemical calculations well agree with the results of electrochemical measurements.

Author information
  • Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, RussiaA. A. Slesarenko, G. Z. Tulibaeva, G. R. Baymuratova, A. V. Yudina, A. F. Shestakov & O. V. Yarmolenko
  • Moscow State University, 119991, Moscow, RussiaA. F. Shestakov
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