스피넬 LiNi0.5Mn1.5O4 양극 활물질의 구조 안정성 연구 : The Studies of Structural Stability of nini0.5Mn1.5O1 Spinel
The Studies of Structural Stability of nini0.5Mn1.5O1 Spinel
- 주제(키워드) capacity fading , TEM , LiNi0.5Mn1.5O4 , lithium batteries
- 발행기관 대한금속·재료학회
- 발행년도 2008
- 총서유형 Journal
- UCI G704-000085.2008.46.3.008
- KCI ID ART001237572
- 본문언어 한국어
초록/요약
The stability of the cathode materials for Li secondary battery is an important factor for its cyclability. The present paper focuses on the structural stability of LiNi0.5Mn1.5O4 during lithiation/delithiation of Li ions and compared to that of LiMn2O4. LiMn2O4 and LiNi0.5Mn1.5O4 powders are synthesized using a solgel method and their structural and electrochemical properties are investigated by XRD, SEM, and chargedischarge tests. LixMn2O4 and LixNi0.5Mn1.5O4(x = 0.9,0.5,0.1) specimens are obtained after charge/discharge tests by controlling the cut-off voltage for XRD and TEM investigation. The charge-discharge tests shows that initial capacity of LiNi0.5Mn1.5O4 is 125 mAh/g and that of LiMn2O4 is around 100 mAh/g. The capacity of LiNi0.5Mn1.5O4 is maintained 95% of its initial capacity whereas the capacity of LiMn2O4 is maintained 65% of its initial capacity.
more