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2018 Vol.28, Issue 5 Preview Page
Stabilization of Nickel-Rich Layered Cathode Materials of High Energy Density by Ca Doping

칼슘 도핑을 통한 고 에너지 밀도를 가지는 Ni-rich 층상 구조형 양극 소재의 안정화

Beomhee Kang
,
Soonhyun Hong
,
Hongkwan Yoon
,
Dojin Kim
,
Chunjoong Kim†
강 범희
,
홍 순현
,
윤 홍관
,
김 도진
,
김 천중†
Department of Materials Science and Engineering, Chungnam National University
충남대학교 신소재공학부
†Corresponding author E-Mail : ckim0218@cnu.ac.kr (Chunjoong Kim, Chungnam Nat’l Univ.)
May 2018. pp. 273-278
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Abstract

Lithium-ion batteries have been considered the most important devices to power mobile or small-sized devices due to their high energy density. LixCoO2 has been studied as a cathode material for the Li-ion battery. However, the limitation of its capacity impedes the development of high capacity cathode materials with Ni, Mn, etc. in them. The substitution of Mn and Ni for Co leads to the formation of solid solution phase LiNixMnyCo1-x-yO2 (NMC, both x and y < 1), which shows better battery performance than unsubstituted LiCoO2. However, despite a high discharge capacity in the Ni-rich compound (Ni > 0.8 in the metal site), poor cycle retention capability still remains to be overcome. In this study, aiming to improve the stability of the physical and chemical bonding, we investigate the stabilization effect of Ca in the Ni-rich layered compound Li(Ni0.83Co0.12Mn0.05)O2, and then Ca is added to the modified secondary particles to lower the degree of cationic mixing of the final particles. For the optimization of the final grains added with Ca, the Ca content (x = 0, 2.5, 5.0, 10.0 at.%) versus Li is analyzed.

Keywords
cathode
layered oxide
calcium
li-ion battery
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 28
  • No :5
  • Pages :273-278
  • Received Date : 2018-03-29
  • Revised Date : 2018-04-17
  • Accepted Date : 2018-04-17
  • DOI :https://doi.org/10.3740/MRSK.2018.28.5.273
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