Ultra-thin Al2O3 coating on the acid-treated 0.3Li(2)MnO(3)center dot 0.7LiMn(0.60)Ni(0.25)Co(0.15)O(2) electrode for Li-ion batteries
- Authors
- Choi, Mansoo; Ham, Giyul; Jin, Bong-Soo; Lee, Sang-Min; Lee, Young Moo; Wang, Guoxiu; Kim, Hyun-Soo
- Issue Date
- Sep-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Li and Mn-rich layered composites; Acid-treatment; Alumina (Al2O3) coating; Atomic layer deposition; Cycle stability; Li-ion battery
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.608, pp.110 - 117
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 608
- Start Page
- 110
- End Page
- 117
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/133979
- DOI
- 10.1016/j.jallcom.2014.04.068
- ISSN
- 0925-8388
- Abstract
- The Li and Mn-rich layered composites represented by Li2MnO3-LiMO2 has been attracting great interests owing to its exceptional high capacity (>= 250 mA h g(-1)) and enhanced structural stability. In order to improve the initial coulombic efficiency and cyclability of the composites, the material has been activated by an acid-treatment and coated with an Al2O3 using an atomic layer deposition (ALD). The acid-treated electrode showed a higher discharge capacity than the as-prepared electrode. The alumina-coated electrode provided an improved specific capacity of the electrode but also cycling stability, when compared with the bare electrode. The electrode coated with the alumina could lead to a decrease in undesirable reactions, thereby acting as a stable protecting layer that could quickly transport Li+ ions during charge and discharge process.
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