Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires
Supercapacitors are emerging as a desirable energy storage medium in view of their order of magnitude higher power density than batteries and energy density than electronic capacitors. One of the key issues in the development of a suitable electrode material for supercapacitors is that materials sho...
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Royal Society of Chemistry
2015
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| Online Access: | http://umpir.ump.edu.my/id/eprint/9309/1/Nb%20doped%20TiO2_RSC%20Advances.pdf http://umpir.ump.edu.my/id/eprint/9309/ http://dx.doi.org/10.1039/C5RA07633A |
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| author | Rajan, Jose Baiju, Vidyadharan Archana, P. S. M. M., Yusoff Jamil, Ismail |
| author_facet | Rajan, Jose Baiju, Vidyadharan Archana, P. S. M. M., Yusoff Jamil, Ismail |
| author_sort | Rajan, Jose |
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| continent | Asia |
| country | Malaysia |
| description | Supercapacitors are emerging as a desirable energy storage medium in view of their order of magnitude higher power density than batteries and energy density than electronic capacitors. One of the key issues in the development of a suitable electrode material for supercapacitors is that materials showing large specific capacitance are poorly abundant. In this paper, we show that niobium doped titanium dioxide (Nb:TiO2) nanowires developed by electrospinning have an order of magnitude higher capacitance (~280 Fg-1) than pristine TiO2 (~40 Fg-1) or zirconium doped TiO2 (~30 Fg-1). The cyclic voltammetry and charge discharge cycling experiments show that the Nb:TiO2¬ nanowires have 100% coulombic efficiency and could be operated over 5000 cycles without any appreciable capacitance degradation. The superior charge storage capability of the Nb:TiO2 is assigned to its high electrical conductivity as determined by electrochemical impedance spectroscopy. A practical supercapacitor is fabricated in asymmetric configuration using the Nb:TiO2 as anode and activated carbon as cathode. The device delivered energy densities of 16.3, 11.4 and 5.6 Whkg-1 at power densities of 770, 1310, and 1900 Wkg-1, respectively. These values are much superior than a control device fabricated using activated carbon as its both electrodes. |
| format | Article |
| id | my.ump.umpir.9309 |
| institution | Universiti Malaysia Pahang |
| language | en |
| publishDate | 2015 |
| publisher | Royal Society of Chemistry |
| record_format | eprints |
| spelling | my.ump.umpir.93092018-07-27T08:20:16Z http://umpir.ump.edu.my/id/eprint/9309/ Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires Rajan, Jose Baiju, Vidyadharan Archana, P. S. M. M., Yusoff Jamil, Ismail QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Supercapacitors are emerging as a desirable energy storage medium in view of their order of magnitude higher power density than batteries and energy density than electronic capacitors. One of the key issues in the development of a suitable electrode material for supercapacitors is that materials showing large specific capacitance are poorly abundant. In this paper, we show that niobium doped titanium dioxide (Nb:TiO2) nanowires developed by electrospinning have an order of magnitude higher capacitance (~280 Fg-1) than pristine TiO2 (~40 Fg-1) or zirconium doped TiO2 (~30 Fg-1). The cyclic voltammetry and charge discharge cycling experiments show that the Nb:TiO2¬ nanowires have 100% coulombic efficiency and could be operated over 5000 cycles without any appreciable capacitance degradation. The superior charge storage capability of the Nb:TiO2 is assigned to its high electrical conductivity as determined by electrochemical impedance spectroscopy. A practical supercapacitor is fabricated in asymmetric configuration using the Nb:TiO2 as anode and activated carbon as cathode. The device delivered energy densities of 16.3, 11.4 and 5.6 Whkg-1 at power densities of 770, 1310, and 1900 Wkg-1, respectively. These values are much superior than a control device fabricated using activated carbon as its both electrodes. Royal Society of Chemistry 2015-05-29 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/9309/1/Nb%20doped%20TiO2_RSC%20Advances.pdf Rajan, Jose and Baiju, Vidyadharan and Archana, P. S. and M. M., Yusoff and Jamil, Ismail (2015) Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires. RSC Advances, 5. pp. 50087-50097. ISSN 2046-2069. (Published) http://dx.doi.org/10.1039/C5RA07633A DOI: 10.1039/C5RA07633A |
| spellingShingle | QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Rajan, Jose Baiju, Vidyadharan Archana, P. S. M. M., Yusoff Jamil, Ismail Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires |
| title | Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires |
| title_full | Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires |
| title_fullStr | Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires |
| title_full_unstemmed | Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires |
| title_short | Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires |
| title_sort | improved supercapacitive charge storage in electrospun niobium doped titania nanowires |
| topic | QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering |
| url | http://umpir.ump.edu.my/id/eprint/9309/1/Nb%20doped%20TiO2_RSC%20Advances.pdf http://umpir.ump.edu.my/id/eprint/9309/ http://dx.doi.org/10.1039/C5RA07633A |
| url_provider | http://umpir.ump.edu.my/ |