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Kim, Youngsik
YK Research
Research Interests
  • Ionic conducting ceramic electrolyte membranes, energy conversion and storage materials and devices

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Effect of a surface treatment for LiNi1/3Co1/3Mn1/3O2 cathode material in lithium secondary batteries

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Title
Effect of a surface treatment for LiNi1/3Co1/3Mn1/3O2 cathode material in lithium secondary batteries
Author
Kim, Hyun-SooKim, Ke-TackKim, YoungsikMartin, Steve W.
Keywords
Al 2O3 nano-particles;  Cyclic life;  Electrochemical property;  Rate capability;  LiNi1/3Co1/3Mn1/3O2;  Sol-gel method
Issue Date
2008-02
Publisher
KOREAN INST METALS MATERIALS
Citation
METALS AND MATERIALS INTERNATIONAL, v.14, no.1, pp.105 - 109
Abstract
LiNi1/3Co1/3Mn1/3O2 cathode material was surface-treated to improve its electrochemical performance. A1 2O3 nanoparticles were coated onto the surface of LiNi1/3Co1/3Mn1/3O2 powder using a sol-gel method. The as-prepared Al2O3 nano-particle was identified as the cubic structure of A12O3. XRD showed that the LiNi1/3Co1/3Mn1/3O2 structure was not affected by the A12O3 coating. With a coating of 3 wt.% A12O3 on LiNi1/3Co 1/3Mn1/3O2, the cyclic-life performance and rate capability were improved. However, heavier coatings (5 wt%) on LiNi 1/3Co1/3Mn1/3O2 resulted in a considerable decrease of the discharge capacity and rate capability. The thermal stability of LiNi1/3Co1/3Mn1/3O2 materials was greatly improved by the 3 wt.% Al2O3 coating.
URI
https://scholarworks.unist.ac.kr/handle/201301/6854
DOI
10.3365/met.mat.2008.02.105
ISSN
1598-9623
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