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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Electrochemical stability of thin-film LiCoO2 cathodes by aluminum-oxide coating

Cited 82 times inthomson ciCited 78 times inthomson ci
Title
Electrochemical stability of thin-film LiCoO2 cathodes by aluminum-oxide coating
Author
Kim, Yong JeongKim, HyeminKim, ByoungsooAhn, DonggiLee, Joon-GonKim, Tae-JoonSon, DongyeonCho, JaephilKim, Young-WoonPark, Byungwoo
Keywords
PULSED-LASER DEPOSITION; RECHARGEABLE LITHIUM BATTERIES; LI-ION CELL; METAL OXIDES; INTERCALATION; DIFFUSION; ELECTRODES; LIXCOO2; AL2O3; ORIENTATION
Issue Date
2003-04
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, v.15, no.7, pp.1505 - 1511
Abstract
High-performance thin-film LiCoO2 cathodes were successfully fabricated by aluminumoxide coating. Both the galvanostatic charge-discharge experiments and the cyclic voltammograms (CVs) showed enhanced electrochemical properties in the Al2O3-coated LiCoO2 films compared to those in the uncoated ones. The improved cycling behaviors in the coated samples are caused by the suppression of cobalt dissolution from the LiCoO2 thin films, with the formation of an aluminum-oxide solid electrolyte residing between the LiCoO2 cathode and liquid electrolyte. Galvanostatic intermittent titration technique (GITT) results clearly showed that the Al2O3-coated samples had higher Li diffusivities than the uncoated ones after 80 cycles. The effect of Al2O3 thickness on the electrochemical properties up to 300 nm was also studied.
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DOI
10.1021/cm0201403
ISSN
0897-4756
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ECHE_Journal Papers
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