Bulletin of the Korean Chemical Society

  • 제31권2호
  • /
  • Pages.355-359
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  • 2010
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Enhanced Electrochemical Property of Surface Modified Li[Co1/3Ni1/3Mn1/3]O2 by ZrFx Coating

  • Yun, Su-Hyun (Department of Advanced Materials Engineering, Kyonggi University) ;
  • Park, Yong-Joon (Department of Advanced Materials Engineering, Kyonggi University)
  • 발행 : 2010.02.20
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초록

A $Li[Co_{1/3}Ni_{1/3}Mn_{1/3}]O_2$ cathode was modified by applying a $ZrF_x$ coating. The surface-modified cathodes were characterized by XRD, SEM, EDS, TEM techniques. XRD patterns of $ZrF_x$-coated $Li[Co_{1/3}Ni_{1/3}Mn_{1/3}]O_2$ revealed that the coating did not affect the crystal structure of the parent powder. SEM and TEM images showed that $ZrF_x$ nano-particles were formed as a coating layer, and EDS data confirmed that $ZrF_x$ distributed uniformly on the surface the powder. Capacity retention of coated samples at high C rates was superior to that of pristine sample. However, as the coating concentration increases beyond the optimum concentration, the rate capability was deteriorated. Whereas, as the increase of coating concentration to 2.0 wt %, the cyclic performances of the electrodes under the severe conditions (high cut-off voltage, 4.8 V, and high measurement temperature, $55^{\circ}C$) were improved considerably.

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참고문헌

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피인용 문헌

  1. Thin Film vol.32, pp.5, 2011, https://doi.org/10.5012/bkcs.2011.32.5.1483
  2. The Effect of Coating Thickness on the Electrochemical Properties of a Li-La-Ti-O-coated Li[Ni0.3Co0.4Mn0.3]O2 Cathode vol.31, pp.11, 2010, https://doi.org/10.5012/bkcs.2010.31.11.3233
  3. Surface Characterization of ZrO2 Coated LiCoO2 Thin Film During Storage vol.32, pp.8, 2011, https://doi.org/10.5012/bkcs.2011.32.8.2799
  4. Review on Synthesis, Characterization, and Electrochemical Properties of Fluorinated Nickel‐Cobalt‐Manganese Cathode Active Materials for Lithium‐Ion Batteries vol.7, pp.6, 2010, https://doi.org/10.1002/celc.202000029