Electrospun TiO2 nanofiber electrodes for high performance supercapacitors
Nanofibers are one dimensional (1D) nanoarchitecture materials having high surface-to-volume ratio which provides improved ion diffusion and high mechanical strength to prevent volume expansion during electrochemical process and enhance the cycle stability. In the present study, TiO _2 nanofibers (T...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2020-01-01
|
| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ab688c |
| _version_ | 1797747043662299136 |
|---|---|
| author | Charan Kuchi A Lakshmi Narayana O M Hussain P Sreedhara Reddy |
| author_facet | Charan Kuchi A Lakshmi Narayana O M Hussain P Sreedhara Reddy |
| author_sort | Charan Kuchi |
| collection | DOAJ |
| description | Nanofibers are one dimensional (1D) nanoarchitecture materials having high surface-to-volume ratio which provides improved ion diffusion and high mechanical strength to prevent volume expansion during electrochemical process and enhance the cycle stability. In the present study, TiO _2 nanofibers (TNFs) were successfully synthesized on an aluminum collector with a polymer concentration of 9 wt % by cost-effective electrospinning technique followed by annealing at a temperature 500 °C. The XRD spectrum of electrospun TNFs exhibited predominant (101) orientation corresponding to anatase TiO _2 with I4 _1 /amd symmetry. The estimated average crystallite size is 18 nm. The strongest Raman vibrational mode at 143 cm ^−1 confirms the phase purity of TNFs. The surface morphological feature depicts interconnected network fibers with a variation in the fiber diameter and the estimated average diameter is ∼150 ± 20 nm. Very smooth surface and homogenously distributed ultra long nanofibers are observed from TEM analysis. The newly fabricated TNF electrode delivered a specific capacitance of 75 Fg ^−1 and retained 95% capacitance even after 5000 cycles. Moreover, it exhibited energy density and power density values of 24 Whkg ^−1 and 22.08 Wkg ^−1 respectively. The large capacitance, high coulombic efficiency and good structural stability demonstrate that TNFs should open up new opportunities for the next-generation high performance supercapacitors. |
| first_indexed | 2024-03-12T15:46:28Z |
| format | Article |
| id | doaj.art-dfbb0ba8094e4ae9a2a47b2dc22320a5 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:46:28Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-dfbb0ba8094e4ae9a2a47b2dc22320a52023-08-09T15:27:21ZengIOP PublishingMaterials Research Express2053-15912020-01-017101509810.1088/2053-1591/ab688cElectrospun TiO2 nanofiber electrodes for high performance supercapacitorsCharan Kuchi0A Lakshmi Narayana1O M Hussain2https://orcid.org/0000-0003-0951-5177P Sreedhara Reddy3https://orcid.org/0000-0002-2065-4197Condensed Matter Physics Laboratory, Department of Physics, Sri Venkateswara University , Tirupati-517502, IndiaShenzhen Engineering Lab of Flexible Transparent Conductive Films, Department of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, 518055, People’s Republic of ChinaCondensed Matter Physics Laboratory, Department of Physics, Sri Venkateswara University , Tirupati-517502, IndiaCondensed Matter Physics Laboratory, Department of Physics, Sri Venkateswara University , Tirupati-517502, IndiaNanofibers are one dimensional (1D) nanoarchitecture materials having high surface-to-volume ratio which provides improved ion diffusion and high mechanical strength to prevent volume expansion during electrochemical process and enhance the cycle stability. In the present study, TiO _2 nanofibers (TNFs) were successfully synthesized on an aluminum collector with a polymer concentration of 9 wt % by cost-effective electrospinning technique followed by annealing at a temperature 500 °C. The XRD spectrum of electrospun TNFs exhibited predominant (101) orientation corresponding to anatase TiO _2 with I4 _1 /amd symmetry. The estimated average crystallite size is 18 nm. The strongest Raman vibrational mode at 143 cm ^−1 confirms the phase purity of TNFs. The surface morphological feature depicts interconnected network fibers with a variation in the fiber diameter and the estimated average diameter is ∼150 ± 20 nm. Very smooth surface and homogenously distributed ultra long nanofibers are observed from TEM analysis. The newly fabricated TNF electrode delivered a specific capacitance of 75 Fg ^−1 and retained 95% capacitance even after 5000 cycles. Moreover, it exhibited energy density and power density values of 24 Whkg ^−1 and 22.08 Wkg ^−1 respectively. The large capacitance, high coulombic efficiency and good structural stability demonstrate that TNFs should open up new opportunities for the next-generation high performance supercapacitors.https://doi.org/10.1088/2053-1591/ab688c1D nanoarchitecture materialselectrospinning techniqueTiO2 nanofibers (TNFs)high performance supercapacitors |
| spellingShingle | Charan Kuchi A Lakshmi Narayana O M Hussain P Sreedhara Reddy Electrospun TiO2 nanofiber electrodes for high performance supercapacitors Materials Research Express 1D nanoarchitecture materials electrospinning technique TiO2 nanofibers (TNFs) high performance supercapacitors |
| title | Electrospun TiO2 nanofiber electrodes for high performance supercapacitors |
| title_full | Electrospun TiO2 nanofiber electrodes for high performance supercapacitors |
| title_fullStr | Electrospun TiO2 nanofiber electrodes for high performance supercapacitors |
| title_full_unstemmed | Electrospun TiO2 nanofiber electrodes for high performance supercapacitors |
| title_short | Electrospun TiO2 nanofiber electrodes for high performance supercapacitors |
| title_sort | electrospun tio2 nanofiber electrodes for high performance supercapacitors |
| topic | 1D nanoarchitecture materials electrospinning technique TiO2 nanofibers (TNFs) high performance supercapacitors |
| url | https://doi.org/10.1088/2053-1591/ab688c |
| work_keys_str_mv | AT charankuchi electrospuntio2nanofiberelectrodesforhighperformancesupercapacitors AT alakshminarayana electrospuntio2nanofiberelectrodesforhighperformancesupercapacitors AT omhussain electrospuntio2nanofiberelectrodesforhighperformancesupercapacitors AT psreedharareddy electrospuntio2nanofiberelectrodesforhighperformancesupercapacitors |