Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electrochemical Characteristics of LiMnO2 for Lithium Secondary Battery

  • Jin Bo (College of Materials Science and Engineering, Jilin University, Department of Electrical Engineering, Chonnam National University) ;
  • Jun Dae-Kyoo (Department of Electrical Engineering, Chonnam National University) ;
  • Gu Hal-Bon (Department of Electrical Engineering, Chonnam National University)
  • Published : 2006.04.01
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Abstract

Well-defined orthorhombic $LiMnO_2\;and\;LiCo_{0.1}Mn_{0.9}O_2$ were synthesized by a solid-state reaction and quenching process. X-ray diffraction (XRD) results revealed that the as-synthesized powders showed an orthorhombic phase of a space group with Pmnm. The $Li/LiMnO_2\;and\;Li/LiCo_{0.1}Mn_{0.9}O_2$ cells were constituted and cycled galvanostatically in the voltage range of 2.0-4.3 V vs. $Li/Li^+$ at a current density of $0.5\;mA\;cm^{-2}$ at room temperature and $50^{\circ}C$, respectively. The results demonstrated that the highest specific capacity of $Li/LiMnO_2$ cells at room temperature and $50^{\circ}C$ was 95 and $155\;mAh\;g^{-1}$, respectively. As for $Li/LiCo_{0.1}Mn_{0.9}O_2$ cells, the highest specific capacity at room temperature and $50^{\circ}C$ was 160 and $250\;mAh\;g^{-l}$, respectively. It could be seen that the performance of $Li/LiCo_{0.1}Mn_{0.9}O_2$ cells was better than that of $Li/LiMnO_2$ cells.

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References

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