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http://dx.doi.org/10.5229/JKES.2016.19.3.80

Enhanced High-Temperature Performance of LiNi0.6Co0.2Mn0.2O2 Positive Electrode Materials by the Addition of nano-Al2O3 during the Synthetic Process  

Park, Ji Min (Department of Chemical Engineering and Biotechnology, Korea Polytechnic University)
Kim, Daeun (Department of Chemical Engineering and Biotechnology, Korea Polytechnic University)
Kim, Hae Bin (Department of Chemical Engineering and Biotechnology, Korea Polytechnic University)
Bae, Joong Ho (Department of Chemical Engineering and Biotechnology, Korea Polytechnic University)
Lee, Ye-Ji (Department of Chemical Engineering and Biotechnology, Korea Polytechnic University)
Myoung, Jae In (Department of Chemical Engineering and Biotechnology, Korea Polytechnic University)
Hwang, Eunkyoung (Department of Chemical Engineering and Biotechnology, Korea Polytechnic University)
Yim, Taeeun (Department of Chemistry, Incheon National University)
Song, Jun Ho (Advanced Batteries Research Center, Korea Electronics Technology Institute)
Yu, Ji-Sang (Advanced Batteries Research Center, Korea Electronics Technology Institute)
Ryu, Ji Heon (Graduate School of Knowledge-Based Technology and Energy, Korea Polytechnic University)
Publication Information
Journal of the Korean Electrochemical Society / v.19, no.3, 2016 , pp. 80-86 More about this Journal
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 $Al_2O_3$ was added to the mixture of transition metal hydroxide and lithium hydroxide. The $LiNi_{0.6}Co_{0.2}Mn_{0.2}O_2$ was simultaneously doped and coated with $Al_2O_3$ during heat-treatment. Electrochemical characteristics of modified $LiNi_{0.6}Co_{0.2}Mn_{0.2}O_2$ were evaluated by the galvanostatic cycling and the LSTA(linear sweep thermmametry) at the constant voltage conditions. The nano-sized $Al_2O_3$ added materials show better cycle performance at elevated temperature than that of micro-sized $Al_2O_3$. As the added amount of nano-$Al_2O_3$ increased, the thermal stability of electrode also enhanced, but the use of 2.5 mol% Al showed the best high temperature performance.
Keywords
high-Ni content layered oxide; nano-$Al_2O_3$; high temperature performance; thermal stability; lithium-ion batteries;
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Times Cited By KSCI : 5  (Citation Analysis)
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