Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Electrochemical Performances of LiMn2O4:Al Synthesized by Solid State Method

고상법으로 합성한 LiMn2O4:Al의 전기화학적 특성

  • Park, Hye-Jung (Korea Institute of Ceramic Engineering & Technology) ;
  • Park, Sun-Min (Korea Institute of Ceramic Engineering & Technology) ;
  • Roh, Gwang-Chul (Korea Institute of Ceramic Engineering & Technology) ;
  • Han, Cheong-Hwa (Department of Advanced Materials & Chemical Engineering, Halla University)
  • 박혜정 (한국세라믹기술원 그린세라믹본부) ;
  • 박선민 (한국세라믹기술원 그린세라믹본부) ;
  • 노광철 (한국세라믹기술원 그린세라믹본부) ;
  • 한정화 (한라대학교 신소재화학공학과)
  • Received : 2011.10.14
  • Accepted : 2011.10.26
  • Published : 2011.11.30
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Abstract

Al doped $LiMn_2O_4$ ($LiMn_2O_4:Al$) synthesized by several Al doping process and Solid State method. The Al contents in $Mn_{1-x}Al_xO_2$ for $LiMn_2O_4:Al$ were analyzed 1.7 wt% by EDS. The $LiMn_2O_4:Al$ confirmed cubic spinel structure and approximately 5 ${\mu}m$ particles regardless of three kinds of doping process by solid state method. In the result of electrochemical performances, initial discharge capacity had 115 mAh/g in case of $LiMn_2O_4$ and 111 mAh/g of $LiMn_2O_4:Al$ after 100th cycle at room temperature. But the capacity retention results showed that $LiMn_2O_4$ and $LiMn_2O_4:Al$ were 44% and 69% respectively in the 100th cycle at 60$^{\circ}C$. Therefore we are confirmed that $LiMn_2O_4:Al$ increased the capacity retention about 25% than $LiMn_2O_4$, thus the effect of Al dopping on $LiMn_2O_4$ capacity retention.

Keywords

References

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