Abstract
A strategy of facile route to prepare the Li 2MnO 3-stabilized LiMO 2 (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. Li 2MnO 3 was synthesized at 400 °C, followed by the mechanochemical process with LiMO 2 to form nanocomposite with the layered-layered structure. Structures and morphologies of xLi 2MnO 3·(1-x)LiMO 2 are investigated to confirm the layered-layered structural integration. Various mole ratios of our xLi 2MnO 3·(1-x)LiMO 2 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 xLi 2MnO 3·(1-x)LiMO 2 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 xLi 2MnO 3·(1-x)LiMO 2 system.
| Original language | English |
|---|---|
| Pages (from-to) | 422-429 |
| Number of pages | 8 |
| Journal | Journal of Power Sources |
| Volume | 220 |
| DOIs | |
| Publication status | Published - 2012 Dec 15 |
| Externally published | Yes |
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Keywords
- Cathodes
- Lithium secondary battery
- Mechanochemical process
- Nanocomposite
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
Synthesis of layered-layered xLi 2MnO 3·(1-x) LiMO 2 (M = Mn, Ni, Co) nanocomposite electrodes materials by mechanochemical process. / Kim, Soo; Kim, Chunjoong; Noh, Jae Kyo; Yu, Seung-Ho; Kim, Su Jin; Chang, Wonyoung; Choi, Won Chang; Chung, Kyung Yoon; Cho, Byung Won.
In: Journal of Power Sources, Vol. 220, 15.12.2012, p. 422-429.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis of layered-layered xLi 2MnO 3·(1-x) LiMO 2 (M = Mn, Ni, Co) nanocomposite electrodes materials by mechanochemical process
AU - Kim, Soo
AU - Kim, Chunjoong
AU - Noh, Jae Kyo
AU - Yu, Seung-Ho
AU - Kim, Su Jin
AU - Chang, Wonyoung
AU - Choi, Won Chang
AU - Chung, Kyung Yoon
AU - Cho, Byung Won
PY - 2012/12/15
Y1 - 2012/12/15
N2 - A strategy of facile route to prepare the Li 2MnO 3-stabilized LiMO 2 (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. Li 2MnO 3 was synthesized at 400 °C, followed by the mechanochemical process with LiMO 2 to form nanocomposite with the layered-layered structure. Structures and morphologies of xLi 2MnO 3·(1-x)LiMO 2 are investigated to confirm the layered-layered structural integration. Various mole ratios of our xLi 2MnO 3·(1-x)LiMO 2 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 xLi 2MnO 3·(1-x)LiMO 2 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 xLi 2MnO 3·(1-x)LiMO 2 system.
AB - A strategy of facile route to prepare the Li 2MnO 3-stabilized LiMO 2 (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. Li 2MnO 3 was synthesized at 400 °C, followed by the mechanochemical process with LiMO 2 to form nanocomposite with the layered-layered structure. Structures and morphologies of xLi 2MnO 3·(1-x)LiMO 2 are investigated to confirm the layered-layered structural integration. Various mole ratios of our xLi 2MnO 3·(1-x)LiMO 2 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 xLi 2MnO 3·(1-x)LiMO 2 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 xLi 2MnO 3·(1-x)LiMO 2 system.
KW - Cathodes
KW - Lithium secondary battery
KW - Mechanochemical process
KW - Nanocomposite
UR - http://www.scopus.com/inward/record.url?scp=84865494568&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84865494568&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2012.07.135
DO - 10.1016/j.jpowsour.2012.07.135
M3 - Article
AN - SCOPUS:84865494568
VL - 220
SP - 422
EP - 429
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -