고상법으로 합성한 LiMn_2O_4:Al의 전기화학적 특성
Electrochemical Performances of LiMn_2O_4:Al Synthesized by Solid State Method
박혜정(한국세라믹기술원); 박선민(한국세라믹기술원); 노광철(한국세라믹기술원); 한정화(한라대학교)
48권 6호, 531~536쪽
초록
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 μm 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℃. 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.
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 μm 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℃. 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.
- 발행기관:
- 한국세라믹학회
- 분류:
- 재료공학