NDLI: A high performance polybenzimidazole–CNT hybrid electrode for high-temperature proton exchange membrane fuel cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Yang, Chen-Shuan Wang, Chen-Hao Du, He-Yun Yu, T. Leon Chang, Sun-Tang Chen, Jyh-Chien Chen, Li-Chyong Lai, Shiau-Wu Chen, Kuei-Hsien Hsu, Hsin-Cheng Huang, Hsin-Chih
Copyright Year	2014
Abstract	Nitrogen-doped CNTs directly grown on a carbon cloth (CNT/CC) hybrid with polybenzimidazole (PBI) are utilized as hybrid electrodes for high-temperature proton exchange membrane fuel cells (HT-PEMFCs). Pt nanoparticles (NPs) of typically 2.5 nm diameter have been deposited uniformly on the electrode composed of either CNT/CC or carbon black on carbon cloth (CB/CC). Comparative study of 0.1 mg cm−2 Pt NPs on a PBI–CNT (Pt/PBI–CNT) electrode and 0.8 mg cm−2 Pt NPs on PBI–carbon black (Pt/PBI–CB) for oxygen reduction in the cathode has been performed. In H2/O2 HT-PEMFC single cell tests, the low Pt-loaded (0.1 mg cm−2) Pt/PBI–CNT/CC electrode outperforms the high Pt-loaded (0.8 mg cm−2) Pt/PBI–CB/CC electrode with maximum power densities of 643 mW cm−2 and 468 mW cm−2, respectively, at 160 °C. Notably, the Pt-loading of a Pt/PBI–CNT/CC cell is one eighth of that of the Pt/PBI–CB/CC cell, while the former outperforms the latter by approximately 38%. The enhancement is attributed to good interfacial continuity between the PBI membrane and the carbon cloth and the uniform dispersion of the catalyst on the PBI–CNT surface, leading to the formation of three-phase contacts, which is essential for the activity of the catalyst.
Starting Page	7015
Ending Page	7019
Page Count	5
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	2
Issue Number	19
Journal	Journal of Materials Chemistry A
DOI	10.1039/c4ta00091a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	CNT Carbon Polybenzimidazole fiber Proton-exchange membrane Electrode Carbon black Carabiner Oxygen Cathode Statistical dispersion Three-phase electric power
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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