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A direct hybridization between isocharged nanosheets of layered metal oxide and graphene through a surface-modification assembly process

Title
A direct hybridization between isocharged nanosheets of layered metal oxide and graphene through a surface-modification assembly process
Authors
Adpakpang K.Oh S.M.Jin X.Hwang S.-J.
Ewha Authors
황성주
SCOPUS Author ID
황성주scopus
Issue Date
2014
Journal Title
Chemistry - A European Journal
ISSN
0947-6539JCR Link
Citation
vol. 20, no. 47, pp. 15459 - 15466
Keywords
graphenehybrid materialslayered compoundslithium-ion batteriesself-assembly
Publisher
Wiley-VCH Verlag
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
An efficient and universal method to directly hybridize isocharged nanosheets of layered metal oxide and reduced graphene oxide (rGO) is developed on the basis of the surface modification and an electrostatically driven assembly process. On the basis of this synthetic method, the CoO2-rGO nanocomposite can be synthesized with exfoliated CoO2 and rGO nanosheets, and transformed into CoO-CoO2-rGO nanocomposites with excellent electrode performance for lithium-ion batteries. Also, this surface-modification assembly route is successfully applied for the synthesis of another mesoporous TiO2-rGO nanocomposite. This result provides clear evidence for the usefulness of the present method as a universal way of hybridizing isocharged anionic nanosheets of inorganic solids and graphene. A universal soft-chemical synthetic route to layered metal oxide-graphene nanocomposites is developed by using the assembly between surface-modified reduced graphene oxide (rGO+) nanosheets and anionic layered metal oxide nanosheets such as CoO2 and TiO2. The resulting cobalt oxide-rGO nanocomposites show promising functionality as electrodes for lithium-ion batteries with excellent rate characteristics, underscoring the usefulness of the present lattice manipulation route. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
DOI
10.1002/chem.201403871
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자연과학대학 > 화학·나노과학전공 > Journal papers
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