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SCI Article

Ultrathin ZrO2 on LiNi0.5Mn0.3Co0.2O2 electrode surface via atomic layer deposition for high-voltage operation in lithium-ion batteries
성명 조국영 ()
소속 공학대학 재료화학공학과
캠퍼스
우수선정주 2019년 07월 1째주
Author Ahn, Jinhyeok (Dept Mat Sci & Chem Engn); Jan, Eun Kwang (Dept Mat Sci & Chem Engn); 조국영 (Dept Mat Sci & Chem Engn) corresponding author;
Corresponding Author Info Cho, KY (reprint author), Hanyang Univ, Dept Mat Sci & Chem Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi, South Korea.; Kim, DH (reprint author), DGIST, Convergence Res Ctr Solar Energy, 333 Techno Jungang Daero, Daegu 42988, South Korea.
E-mail 이메일kycho@hanyang.ac.kr
Document Type Article
Source APPLIED SURFACE SCIENCE Volume:484 Issue: Pages:701-709 Published:2019
Times Cited 0
External Information http://dx.doi.org/10.1016/j.apsusc.2019.04.123
Abstract High-voltage operation in LiNi0.5Mn0.3Co0.2O2 (NMC532) is an attractive strategy to meet the demands for practical application of high energy density lithium-ion batteries (LIBs). However, a serious problem at high cut-off voltage is the capacity fading during charge-discharge cycling, caused by electrolyte decomposition and dissolution of cathode materials. Herein, we fabricated an ultrathin ZrO2 coating on the surface of the as-prepared NMC532 electrode via atomic layer deposition (ALD) to improve the electrochemical performances of the high-voltage NMC532/graphite system. The capacity retention and rate capability of NMC 532 electrode at high voltage (4.6 V) operation were improved by the ZrO2 coating. Cyclic voltammetry, X-ray photoelectron spectroscopy, and X-ray diffraction analyses of ZrO2-coated NMC532 electrode revealed that the enhanced electrochemical performance was due to the reduced side reaction, structural disordering, and polarization at the cathode surface. Thus, ZrO2 coating of the as-prepared electrode by ALD is a promising technique to maintain the high electrochemical performance of LIBs during high-voltage operations.
Web of Science Categories Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
Funding National Research Foundation of Korea (NRF) [2018R1A2B6003422]; National Research Council of Science and Technology (NST) - Korea government Ministry of Science and ICT (MSIT) [CAP-16-04-KRISS]
Language English
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