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Electrochemically deposited Fe2O3 nanorods on carbon nanofibers for free-standing anodes of lithium-ion batteries

Title
Electrochemically deposited Fe2O3 nanorods on carbon nanofibers for free-standing anodes of lithium-ion batteries
Authors
Park, YiseulOh, MisolPark, Jung SooBaek, Seong-HoKim, MinsunKim, SoonhyunKim, Jae Hyun
DGIST Authors
Baek, Seong-HoKim, SoonhyunKim, Jae Hyun
Issue Date
2015-11
Citation
Carbon, 94, 9-17
Type
Article
Article Type
Article
Keywords
Composite ElectrodeElectric BatteriesElectrochemical DepositionElectrodepositionElectrodesElectronic ConductivityFree-Standing ElectrodeGrowth MechanismsHigh ConductivityLithium-Ion BatteriesLithium AlloysLithium CompoundsNanofibersNanorodsPrecursor ConcentrationReductionSocial Networking (Online)SubstratesThree-Dimensional Structure
ISSN
0008-6223
Abstract
Fe2O3 nanorod/carbon nanofiber (CNF) composites were prepared by the electrochemical deposition of Fe2O3 on a web of CNFs, which was then used as a free-standing anode. The conductive, three-dimensional structure of the CNF web allowed for the electrodeposition of the Fe2O3 nanorods, while its high conductivity made it possible to use the composite as a free-standing electrode in lithium-ion batteries. In addition, it was easy and cheap to fabricate by a simplification of a process of cell preparation. The nanorod-like Fe2O3 structures could only be electrodeposited on the CNFs; flake-like Fe2O3 was formed on flat conductive glass substrates. It can be attributed to the different growth mechanism of Fe2O3 on the CNFs because of the large number of reaction sites on the CNFs, differences in the precursor concentration and diffusivity within the CNF web. The formation of aggregates of the Fe2O3 particles on thicker CNFs also indicated that the CNFs had determined the Fe2O3 growth mechanism. The synthesised Fe2O3/CNF composite electrode exhibited stable rate capacities at different current densities. This suggested that CNF-based composite did not exhibit the intrinsic disadvantages of Fe2O3. Finally, carbon coatings were deposited on the Fe2O3/CNF composites to further improve their electronic conductivity and rate capability. © 2015 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5159
DOI
10.1016/j.carbon.2015.06.031
Publisher
Elsevier Ltd
Related Researcher
Files:
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Collection:
Smart Textile Convergence Research Group1. Journal Articles


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