A novel concentration-gradient Li[Ni0.83Co0.07Mn0.10]O-2 cathode material for high-energy lithium-ion batteries
- Authors
- Sun, Yang Kook; Lee, Bo-Ram; Noh, Hyung-Ju; Wu, Huiming; Myung, Seung-Taek; Amine, Khalil
- Issue Date
- Jul-2011
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY, v.21, no.27, pp.10108 - 10112
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY
- Volume
- 21
- Number
- 27
- Start Page
- 10108
- End Page
- 10112
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/28108
- DOI
- 10.1039/c0jm04242k
- ISSN
- 0959-9428
- Abstract
- A novel concentration-gradient Li[Ni0.83Co0.07Mn0.10]O-2 cathode material was successfully synthesized via co-precipitation, in which the core Li[Ni0.9Co0.05Mn0.05]O-2 was encapsulated completely with a stable concentration-gradient layer having reduced Ni content. The electrochemical and thermal properties of the concentration-gradient Li[Ni0.83Co0.07Mn0.10]O-2 were studied and compared to those of the core Li[Ni0.9Co0.05Mn0.05]O-2 material alone. The concentration-gradient material had a superior lithium intercalation stability and thermal stability compared to the core material. The high capacity was delivered from the Ni-rich core Li[Ni0.9Co0.05Mn0.05]O-2, and the improved thermal stability was achieved by the Ni-depleted concentration-gradient layer with outer surface composition of Li[Ni0.68Co0.12Mn0.20]O-2. The concentration-gradient materials open a new era for the development of advanced Li-ion batteries with high energy density, long cycle life, and improved safety.
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