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J. Korean Ceram. Soc. > Volume 48(6); 2011 > Article
Journal of the Korean Ceramic Society 2011;48(6): 531.
doi: https://doi.org/10.4191/kcers.2011.48.6.531
고상법으로 합성한 LiMn2O4:Al의 전기화학적 특성
박혜정, 박선민, 노광철, 한정화1
한국세라믹기술원 그린세라믹본부
1한라대학교 신소재화학공학과
Electrochemical Performances of LiMn2O4:Al Synthesized by Solid State Method
Hye-Jung Park, Sun-Min Park, Gwang-Chul Roh, Cheong-Hwa Han1
Korea Institute of Ceramic Engineering & Technology
1Department of Advanced Materials & Chemical Engineering, Halla University
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.
Key words: Li-ion battery, $LiMn_2O_4$, Al doping, Capacity fading, Solid state method
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