Enhanced High-Temperature Performance of LiNi0.6Co0.2Mn0.2O2 Positive Electrode Materials by the Addition of nano-Al2O3 during the Synthetic Process
- Authors
- Park, Ji Min; Kim, Daeun; Bin Kim, Hae; Bae, Joong Ho; Lee, Ye-Ji; Myoung, Jae In; Hwang, Eunkyoung; Yim, Taeeun; Song, Jun Ho; Yu, Ji-Sang; Ryu, Ji Heon
- Issue Date
- Aug-2016
- Publisher
- KOREAN ELECTROCHEMICAL SOC
- Keywords
- high-Ni content layered oxide; nano-Al2O3; high temperature performance; thermal stability; lithium-ion batteries
- Citation
- JOURNAL OF THE KOREAN ELECTROCHEMICAL SOCIETY, v.19, no.3, pp 80 - 86
- Pages
- 7
- Journal Title
- JOURNAL OF THE KOREAN ELECTROCHEMICAL SOCIETY
- Volume
- 19
- Number
- 3
- Start Page
- 80
- End Page
- 86
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/64183
- DOI
- 10.5229/JKES.2016.19.3.80
- ISSN
- 1229-1935
2288-9000
- Abstract
- High Ni content layered oxide materials for the positive electrode in lithium-ion batteries have high specific capacity. However, their poor electrochemical and thermal stability at elevated temperature restrict the practical use. A small amount of Al2O3 was added to the mixture of transition metal hydroxide and lithium hydroxide. The LiNi0.6Co0.2Mn0.2O2 was simultaneously doped and coated with Al2O3 during heat-treatment. Electrochemical characteristics of modified LiNi0.6Co0.2Mn0.2O2 were evaluated by the galvanostatic cycling and the LSTA(linear sweep thermmametry) at the constant voltage conditions. The nano-sized Al2O3 added materials show better cycle performance at elevated temperature than that of micro-sized Al2O3. As the added amount of nano-Al2O3 increased, the thermal stability of electrode also enhanced, but the use of 2.5 mol% Al showed the best high temperature performance.
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