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SCI-E Article

Improved Cycling Stability of Li[Ni0.90Co0.05Mn0.05]O-2 Through Microstructure Modification by Boron
성명 윤종승()
소속 공과대학 신소재공학부
캠퍼스
우수선정주 2018년 10월 2째주
Author Park, Kang-Joon (Dept Energy Engn); 선양국 (Dept Energy Engn) corresponding author; 윤종승 (Dept Mat Sci & Engn) corresponding author;
Corresponding Author Info Sun, YK (reprint author), Hanyang Univ, Dept Energy Engn, Seoul 04763, South Korea.; Yoon, CS (reprint author), Hanyang Univ, Dept Mat Sci & Engn, Seoul 04763, South Korea.
E-mail 이메일 아이콘csyoon@hanyang.ac.kr
Document Type Article
Source ADVANCED ENERGY MATERIALS Volume:8 Issue:25 Pages:- Published:2018
Times Cited 0
External Information http://dx.doi.org/10.1002/aenm.201801202
Abstract Boron-doped Li[Ni0.90Co0.05Mn0.05]O-2 cathodes are synthesized by adding B2O3 during the lithiation of the hydroxide precursor. Density functional theory confirms that boron doping at a level as low as 1 mol% alters the surface energies to produce a highly textured microstructure that can partially relieve the intrinsic internal strain generated during the deep charging of Li[Ni0.90Co0.05Mn0.05]O-2. The 1 mol% B-Li[Ni0.90Co0.05Mn0.05]O-2 cathode thus delivers a discharge capacity of 237 mAh g(-1) at 4.3 V, with an outstanding capacity retention of 91% after 100 cycles at 55 degrees C, which is 15% higher than that of the undoped Li[Ni0.90Co0.05Mn0.05]O-2 cathode. This proposed synthesis strategy demonstrates that an optimal microstructure exists for extending the cycle life of Ni-rich Li[Ni1-x-yCoxMny]O-2 cathodes that have an inadequate cycling stability in electric vehicle applications and indicates that an optimal microstructure can be achieved through surface energy modification.
Web of Science Categories Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
Funding National Research Foundation of Korea (NRF) - Korea government Ministry of Education and Science Technology [NRF-2018R1A2B3008794]; Human Resources Development program of a Korea Institute of Energy Technology Evaluation and Planning grant - Ministry of T
Language English
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