Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Study on the Dominant Film-Forming Site Among Components of Li(Ni1/3Co1/3Mn1/3)O2 Cathode in Li-ion Batteries

  • Kim, Ke-Tack (Department of Chemistry, Sangmyung University) ;
  • Kam, Dae-woong (Battery Research Center, Korea Electrotechnology Research Institute) ;
  • Nguyen, Cao Cuong (Department of Fine Chemical Engineering & Applied Chemistry, Chungnam National University) ;
  • Song, Seung-Wan (Department of Fine Chemical Engineering & Applied Chemistry, Chungnam National University) ;
  • Kostecki, Robert (Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory)
  • Received : 2011.04.20
  • Accepted : 2011.06.17
  • Published : 2011.08.20
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Abstract

Surface film formation on $Li(Ni_{1/3}Co_{1/3}Mn_{1/3})O_2$ cathodes upon oxidation of electrolyte during electrochemical cycling was investigated. Information on the important factors for film formation on the cathode can facilitate the design of additives that improve the properties of the cathode. Pyrazole is added to the electrolyte because it is readily oxidized to form a surface film on the cathode. The results of differential scanning calorimetry and Fourier transform infrared spectroscopy (FTIR) showed that the active material played a dominant role in the interfacial film formation with the electrolyte. Carbon black played a negligible role in the surface film formation.

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References

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