Nanostructured cobalt oxide-based composites for rechargeable Li-ion batteries

Cobalt oxide-based nanocomposites are prepared using Co 3 O 4 , various metals (Al, Mg), carbon powders, and a simple high-energy mechanical milling technique. X-ray diffraction, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy show that the cobalt oxide-based c...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2012-08, Vol.16 (8), p.2631-2638
Main Authors: Yu, Byeong-Chul, Lee, Jae-O, Song, Jun Ho, Park, Cheol-Min, Lee, Churl Kyoung, Sohn, Hun-Joon
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Energy Storage
Original Paper
Physical Chemistry
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Summary:Cobalt oxide-based nanocomposites are prepared using Co 3 O 4 , various metals (Al, Mg), carbon powders, and a simple high-energy mechanical milling technique. X-ray diffraction, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy show that the cobalt oxide-based composites are mainly composed of nanostructured CoO/Al 2 O 3 , CoO/MgO, and Co 3 O 4 /C composites, respectively. Based on concepts related to the enhanced electrical conductivity of the Co 3 O 4 /C nanocomposite using conducting carbon matrix and to the resistance of inactive ceramic matrices (Al 2 O 3 , MgO) against active CoO particle growth during cycling, various nanostructured cobalt oxide-based composites are tested for use as anode materials. Among the composites, the Co 3 O 4 /C nanocomposite anode exhibits good electrochemical characteristics, such as high-capacity, good initial Coulombic efficiency, and long cycle behavior for Li-ion batteries.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-012-1661-3