Understanding structure-function relationship in hybrid Co3O4-Fe2O3/C lithium-ion battery electrodes

Sultana, Irin, Rahman, Md Mokhlesur, Ramireddy, Thrinathreddy, Sharma, Neeraj, Poddar, Debasis, Khalid, Abbas, Zhang, Hongzhou, Chen, Ying and Glushenkov, Alexey M. 2015, Understanding structure-function relationship in hybrid Co3O4-Fe2O3/C lithium-ion battery electrodes, ACS applied materials and interfaces, vol. 7, no. 37, pp. 20736-20744, doi: 10.1021/acsami.5b05658.

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Title Understanding structure-function relationship in hybrid Co3O4-Fe2O3/C lithium-ion battery electrodes
Author(s) Sultana, Irin
Rahman, Md MokhlesurORCID iD for Rahman, Md Mokhlesur orcid.org/0000-0002-4499-8277
Ramireddy, Thrinathreddy
Sharma, Neeraj
Poddar, Debasis
Khalid, Abbas
Zhang, Hongzhou
Chen, YingORCID iD for Chen, Ying orcid.org/0000-0002-7322-2224
Glushenkov, Alexey M.
Journal name ACS applied materials and interfaces
Volume number 7
Issue number 37
Start page 20736
End page 20744
Total pages 9
Publisher American Chemical Society
Place of publication Washington, DC.
Publication date 2015-09-23
ISSN 1944-8252
Keyword(s) Li-ion batteries
cycling stability
ex situ SEM
hybrid electrodes
in situ synchrotron XRD
Science & Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Science & Technology - Other Topics
Materials Science
Summary A range of high-capacity Li-ion anode materials (conversion reactions with lithium) suffer from poor cycling stability and limited high-rate performance. These issues can be addressed through hybridization of multiple nanostructured components in an electrode. Using a Co3O4-Fe2O3/C system as an example, we demonstrate that the cycling stability and rate performance are improved in a hybrid electrode. The hybrid Co3O4-Fe2O3/C electrode exhibits long-term cycling stability (300 cycles) at a moderate current rate with a retained capacity of approximately 700 mAh g(-1). The reversible capacity of the Co3O4-Fe2O3/C electrode is still about 400 mAh g(-1) (above the theoretical capacity of graphite) at a high current rate of ca. 3 A g(-1), whereas Co3O4-Fe2O3, Fe2O3/C, and Co3O4/C electrodes (used as controls) are unable to operate as effectively under identical testing conditions. To understand the structure-function relationship in the hybrid electrode and the reasons for the enhanced cycling stability, we employed a combination of ex situ and in situ techniques. Our results indicate that the improvements in the hybrid electrode originate from the combination of sequential electrochemical activity of the transition metal oxides with an enhanced electronic conductivity provided by percolating carbon chains.
Language eng
DOI 10.1021/acsami.5b05658
Field of Research 100708 Nanomaterials
091202 Composite and Hybrid Materials
091205 Functional Materials
0904 Chemical Engineering
0303 Macromolecular And Materials Chemistry
0306 Physical Chemistry (Incl. Structural)
Socio Economic Objective 850602 Energy Storage (excl. Hydrogen)
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2015, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30079853

Document type: Journal Article
Collection: Institute for Frontier Materials
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