TiO2 coated carbon nanotubes for electrochemical energy storage
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
TiO2 coated carbon nanotubes for electrochemical
energy storage
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| Creator |
Hemalatha, K.
Prakash, A.S. Guruprakash, K. Jayachandran, M. |
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| Subject |
Nanotechnology
Electrochemical Power Sources |
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| Description |
Metal oxide–carbon architectures (CNTs, graphene, fullerenes, carbon spheres, etc.) have been widely
studied due to their outstanding charge storage properties. In this study, we have investigated the charge
storage mechanism in TiO2 coated CNTs. TiO2 nanoparticles are anchored to functionalized multiwalled
CNTs via controlled hydrolysis of titanium(IV) isopropoxide. The composite architecture thus produced
was composed of uniformly coated TiO2 particles (size ranging from 10–30 nm) around the CNTs'
surface. The Li-ion storage in TiO2 coated CNTs was investigated using cyclic voltammetry (CV) and
galvanostatic charge–discharge experiments. Galvanostatic cycling illustrates a high capacity of 470 mA
h g�1 for the composite electrode, a value higher than the theoretical specific capacity (335 mA h g�1) of
anatase TiO2. Electrochemical analysis using CV measurements indicates the total charge storage value
observed is the cumulative response of diffusion controlled and non-diffusion controlled processes. The
repartition of the total charge storage contribution indicates the dominance of Li-intercalation at the
peak potential and the capacitive surface reactions at the rest of the potentials in the operating voltage
window of 1.5–2.2 V. Hence the nano composite reported here shows the importance of synergistic
charge storage contribution from Li-ion insertion and pseudocapacitance resulting in high capacity
electrode material
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| Publisher |
The Royal Society of Chemistry
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| Date |
2014
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3094/1/033-2014.pdf
Hemalatha, K. and Prakash, A.S. and Guruprakash, K. and Jayachandran, M. (2014) TiO2 coated carbon nanotubes for electrochemical energy storage. Journal of Materials Chemistry A, 2. pp. 1757-1766. ISSN 0959-9428 |
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| Relation |
http://www.rsc.org/MaterialsA
http://cecri.csircentral.net/3094/ |
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