Comparative Electrocatalytic Performance of Single-Walled and Multiwalled Carbon Nanotubes for Zinc Bromine Redox Flow Batteries
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Comparative Electrocatalytic Performance of Single-Walled and Multiwalled Carbon Nanotubes for Zinc Bromine Redox Flow
Batteries
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| Creator |
Munaiah, Y.
Suresh, S. Dheenadayalan, S. Vijayamohanan, K.Pillai Raghupathy, P. |
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| Subject |
Electrochemical Materials Science
Electrochemical Power Sources |
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| Description |
Carbon nanotubes (CNTs) have been employed
as electrode materials in rechargeable zinc bromine
redox flow batteries (ZBB) owing to their high electrocatalytic
activity, remarkable electrical conductivity, and excellent
mechanical strength with high Young’s modulus. The
electrocatalytic effect of single-walled carbon nanotube
(SWCNT) and multiwalled carbon nanotube (MWCNT)
electrodes for the 2Br−/Br2 redox couple has been investigated
for zinc bromine redox flow battery application. The anodic
peak current density of SWCNT electrode is found to be about 16 mA cm−2
, which is almost 50% higher than that of MWCNT,
indicating the enhanced electrocatalytic effect of SWCNT perhaps due to a large amount of basal planes. The peak separation
between the anodic and cathodic process at SWCNT and MWCNT electrodes is 201 and 126 mV, respectively, demonstrating
the quasireversible nature of the 2Br−/Br2 redox reaction. Moreover, the peak separation for the MWCNT electrode is 37% less
compared to that on the SWCNT electrode, revealing better reversibility. FTIR, Raman spectroscopy, scanning electron
microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) have been used to
further investigate the composition and morphological changes of CNT before and after cycling. Zinc bromine redox flow cell
made with CNT-anchored carbon felt (CF) as bromine electrode exhibits improved electrochemical performance in terms of
efficiency and durability. Particularly, SWCNT-modified electrode possesses 98% energy efficiency retention even after 200
cycles of charge−discharge process, offering great promise as high-performance electrodes for zinc bromine redox flow battery
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| Publisher |
The American Chemical Society
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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/3086/1/024-2014.pdf
Munaiah, Y. and Suresh, S. and Dheenadayalan, S. and Vijayamohanan, K.Pillai and Raghupathy, P. (2014) Comparative Electrocatalytic Performance of Single-Walled and Multiwalled Carbon Nanotubes for Zinc Bromine Redox Flow Batteries. Journal of Physical Chemistry D, 118. pp. 14795-14804. |
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| Relation |
http://www.pubs.acs.org/JPCC
http://cecri.csircentral.net/3086/ |
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