Synthesis of layered-layered xLi2MnO3ㆍ(1-x)LiMO2 (M = Mn, Ni, Co) nanocomposite electrodes materials by mechanochemical process

Title
Synthesis of layered-layered xLi2MnO3ㆍ(1-x)LiMO2 (M = Mn, Ni, Co) nanocomposite electrodes materials by mechanochemical process
Authors
김수김천중노재교류승호김수진장원영최원창정경윤조병원
Keywords
Lithium secondary battery; Cathodes; Mechanochemical process; Nanocomposite
Issue Date
2012-12
Publisher
Journal of power sources
Citation
VOL 220, 422-429
Abstract
A strategy of facile route to prepare the Li2MnO3-stabilized LiMO2 (M = Mn, Ni, Co) electrode materials, cathode materials for Lithium secondary batteries that can be operated at the high voltage greater than 4.5 V, is proposed using the method of mechanochemical process. Li2MnO3 was synthesized at 400 °C, followed by the mechanochemical process with LiMO2 to form nanocomposite with the layered–layered structure. Structures and morphologies of xLi2MnO3·(1−x)LiMO2 are investigated to confirm the layered–layered structural integration. Various mole ratios of our xLi2MnO3·(1−x)LiMO2 electrode materials exhibit a large discharge capacity about 200 mAh g−1 at the room temperature. The cycle performances and the specific discharge capacities are improved by the secondary heat treatment for the xLi2MnO3·(1−x)LiMO2 composite electrodes where x ≤ 0.5. Our experimental results suggest the mechanochemical process is an easy and effective tool to form the nanocomposite of two components with controlled composition, especially, for the layered–layered integrated structure of xLi2MnO3·(1−x)LiMO2 system.
URI
http://pubs.kist.re.kr/handle/201004/43068
ISSN
03787753
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KIST Publication > Article
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