Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes
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 p...
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2016
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| Online Access: | http://hdl.handle.net/10725/5263 http://dx.doi.org/10.1021/acscatal.6b01016 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://pubs.acs.org/doi/abs/10.1021/acscatal.6b01016?src=recsys |
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| _version_ | 1864513465749602304 |
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| author | Fawaz, Wissam |
| author2 | Chitturi, Venkateswara Rao Ara, Mahbuba Ng, K. Y. Simon Arava, Leela Mohana Reddy |
| author2_role | author author author author |
| author_facet | Fawaz, Wissam Chitturi, Venkateswara Rao Ara, Mahbuba Ng, K. Y. Simon Arava, Leela Mohana Reddy |
| author_role | author |
| dc.creator.none.fl_str_mv | Fawaz, Wissam Chitturi, Venkateswara Rao Ara, Mahbuba Ng, K. Y. Simon Arava, Leela Mohana Reddy |
| dc.date.none.fl_str_mv | 2016 2017-02-22T12:26:11Z 2017-02-22T12:26:11Z 2017-02-22 |
| dc.identifier.none.fl_str_mv | 2155-5435 http://hdl.handle.net/10725/5263 http://dx.doi.org/10.1021/acscatal.6b01016 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. http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://pubs.acs.org/doi/abs/10.1021/acscatal.6b01016?src=recsys |
| dc.language.none.fl_str_mv | en |
| dc.relation.none.fl_str_mv | ACS Catalysis |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | LAURepo_c0e9fe216a300d3d4b87abd3f9709739 |
| identifier_str_mv | 2155-5435 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. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/5263 |
| publishDate | 2016 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodesFawaz, WissamChitturi, Venkateswara RaoAra, MahbubaNg, K. Y. SimonArava, Leela Mohana ReddyAchieving 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.PublishedN/A2017-02-22T12:26:11Z2017-02-22T12:26:11Z20162017-02-22Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2155-5435http://hdl.handle.net/10725/5263http://dx.doi.org/10.1021/acscatal.6b01016Chitturi, 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.http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.phphttp://pubs.acs.org/doi/abs/10.1021/acscatal.6b01016?src=recsysenACS Catalysisinfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/52632021-03-19T10:03:24Z |
| spellingShingle | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes Fawaz, Wissam |
| status_str | publishedVersion |
| title | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes |
| title_full | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes |
| title_fullStr | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes |
| title_full_unstemmed | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes |
| title_short | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes |
| title_sort | Enhanced lithium–oxygen battery performances with Pt subnanocluster decorated N-doped single-walled carbon nanotube cathodes |
| url | http://hdl.handle.net/10725/5263 http://dx.doi.org/10.1021/acscatal.6b01016 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://pubs.acs.org/doi/abs/10.1021/acscatal.6b01016?src=recsys |