Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes

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dc.contributor.author Fawaz, Wissam
dc.contributor.author Chitturi, Venkateswara Rao
dc.contributor.author Ara, Mahbuba
dc.contributor.author Ng, K. Y. Simon
dc.contributor.author Arava, Leela Mohana Reddy
dc.date.accessioned 2017-02-22T12:26:11Z
dc.date.available 2017-02-22T12:26:11Z
dc.date.copyright 2016 en_US
dc.identifier.issn 2155-5435 en_US
dc.identifier.uri http://hdl.handle.net/10725/5263
dc.description.abstract Achieving dramatic improvement in long-term cycling performance in Li–O2 batteries continues to remain a challenge, which is imperative for turning their alluring promise into reality. Developing a bifunctional cathode material capable of reducing overpotentials and enhancing the long-term cycling performances holds the key. Herein, bifunctional cathodes for Li–O2 batteries were prepared by electrodeposited Pt subnanoclusters on pristine as well as nitrogen-doped single-walled carbon nanotubes (SWCNTs) using rotating disk electrode voltammetry techniques. Diffraction, microscopic, and spectroscopic techniques were used to characterize the prepared materials, and the phase purity of the materials was confirmed. Microscopic analysis depicted a fine dispersion of ≤2 nm Pt nanoclusters on single-walled carbon nanotubes. Rotating disk electrode voltammetry measurements indicated low overpotentials as well as high catalytic ORR/OER activities with Pt nanocluster decorated SWCNTs in comparison to Pt-free SWCNTs. Among the investigated cathodes, Pt/N-SWCNTs exhibited high discharge capacities of 7685 and 5907 mAh/g at 100 and 500 mA/g, respectively, and also good capacity retention. Moreover, a stable capacity of 3000 mAh/g with 100% Coulombic efficiency at 500 mA/g was demonstrated under repeated cycling conditions. On the basis of the ex situ Raman spectroscopic studies, the high Li–O2 battery performance of the Pt/N-SWCNT cathode was attributed to the high decomposition activity of Li2O2 and negligible amount of Li2O2 accumulated on the electrode surface during cycling. en_US
dc.language.iso en en_US
dc.title Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SOE en_US
dc.author.idnumber 200602957 en_US
dc.author.department Electrical And Computer Engineering en_US
dc.description.embargo N/A en_US
dc.relation.journal ACS Catalysis en_US
dc.journal.volume 6 en_US
dc.journal.issue 10 en_US
dc.article.pages 7088-7097 en_US
dc.keywords Bifunctional catalysts en_US
dc.keywords Electrocatalysis en_US
dc.keywords Metal−oxygen batteries en_US
dc.keywords Nanoclusters en_US
dc.keywords Single-walled carbon nanotubes en_US
dc.identifier.doi http://dx.doi.org/10.1021/acscatal.6b01016 en_US
dc.identifier.ctation Chitturi, V. R., Ara, M., Fawaz, W., Ng, K. S., & Arava, L. M. R. (2016). Enhanced Lithium–Oxygen Battery Performances with Pt Subnanocluster Decorated N-Doped Single-Walled Carbon Nanotube Cathodes. en_US
dc.author.email wissam.fawaz@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://pubs.acs.org/doi/abs/10.1021/acscatal.6b01016?src=recsys en_US
dc.author.affiliation Lebanese American University en_US

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