Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes
Energy storage devices with higher volumetric energies and power densities are crucial in delivering high electrochemical performances without being bulky. Herein, a flexible free-standing carbon nanofiber (CNF) electrode with and without graphene is derived from electrospun polyacrylonitrile nanofi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
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American Chemical Society
2022
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| Online Access: | http://umpir.ump.edu.my/id/eprint/38057/1/acs.energyfuels.2c03505.pdf http://umpir.ump.edu.my/id/eprint/38057/7/Improving%20flexibility%20and%20capacitive%20charge%20storability%20in%20free-standing%20.pdf |
| _version_ | 1796995797477228544 |
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| author | Pourmohammad, Mahdi Ling, JinKiong Yousefzadeh, Maryam Rajan, Jose |
| author_facet | Pourmohammad, Mahdi Ling, JinKiong Yousefzadeh, Maryam Rajan, Jose |
| author_sort | Pourmohammad, Mahdi |
| collection | UMP |
| description | Energy storage devices with higher volumetric energies and power densities are crucial in delivering high electrochemical performances without being bulky. Herein, a flexible free-standing carbon nanofiber (CNF) electrode with and without graphene is derived from electrospun polyacrylonitrile nanofiber mesh. The embedded graphene enhanced the conductivity of the polymeric solution, generating significant “whipping” motion to create better fiber cross-linking that enhances the flexibilities of CNFs. Besides, the presence of graphene reduced the population of surface oxygenated functional groups when compared to the pristine CNF. Raman spectroscopy demonstrated lower defect states in graphene-embedded CNFs, favorable for better electrical conductivity. Both the reduced surface functional group and reduced impedance (1.0 Ω compared to 1.1 Ω of pristine CNF) show that a graphene-embedded CNF recorded improved rate capability compared to a pristine CNF. When fabricated into a symmetry supercapacitor, a volumetric energy density of ∼4 mWh cm–3 at a power density of ∼63 mW cm–3 was achieved, which is one of the highest reported values based on our knowledge. |
| first_indexed | 2024-03-06T13:07:34Z |
| format | Article |
| id | UMPir38057 |
| institution | Universiti Malaysia Pahang |
| language | English English |
| last_indexed | 2024-03-06T13:07:34Z |
| publishDate | 2022 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | UMPir380572023-08-02T03:22:09Z http://umpir.ump.edu.my/id/eprint/38057/ Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes Pourmohammad, Mahdi Ling, JinKiong Yousefzadeh, Maryam Rajan, Jose QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Energy storage devices with higher volumetric energies and power densities are crucial in delivering high electrochemical performances without being bulky. Herein, a flexible free-standing carbon nanofiber (CNF) electrode with and without graphene is derived from electrospun polyacrylonitrile nanofiber mesh. The embedded graphene enhanced the conductivity of the polymeric solution, generating significant “whipping” motion to create better fiber cross-linking that enhances the flexibilities of CNFs. Besides, the presence of graphene reduced the population of surface oxygenated functional groups when compared to the pristine CNF. Raman spectroscopy demonstrated lower defect states in graphene-embedded CNFs, favorable for better electrical conductivity. Both the reduced surface functional group and reduced impedance (1.0 Ω compared to 1.1 Ω of pristine CNF) show that a graphene-embedded CNF recorded improved rate capability compared to a pristine CNF. When fabricated into a symmetry supercapacitor, a volumetric energy density of ∼4 mWh cm–3 at a power density of ∼63 mW cm–3 was achieved, which is one of the highest reported values based on our knowledge. American Chemical Society 2022-12 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/38057/1/acs.energyfuels.2c03505.pdf pdf en http://umpir.ump.edu.my/id/eprint/38057/7/Improving%20flexibility%20and%20capacitive%20charge%20storability%20in%20free-standing%20.pdf Pourmohammad, Mahdi and Ling, JinKiong and Yousefzadeh, Maryam and Rajan, Jose (2022) Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes. Energy and Fuels, 36 (24). pp. 15268-15278. ISSN 0887-0624 (Print); 1520-5029 (Online). (Published) https://doi.org/10.1021/acs.energyfuels.2c03505 https://doi.org/10.1021/acs.energyfuels.2c03505 |
| spellingShingle | QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Pourmohammad, Mahdi Ling, JinKiong Yousefzadeh, Maryam Rajan, Jose Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes |
| title | Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes |
| title_full | Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes |
| title_fullStr | Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes |
| title_full_unstemmed | Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes |
| title_short | Improving flexibility and capacitive charge storability in free-standing carbon nanofiber electrodes |
| title_sort | improving flexibility and capacitive charge storability in free standing carbon nanofiber electrodes |
| topic | QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering |
| url | http://umpir.ump.edu.my/id/eprint/38057/1/acs.energyfuels.2c03505.pdf http://umpir.ump.edu.my/id/eprint/38057/7/Improving%20flexibility%20and%20capacitive%20charge%20storability%20in%20free-standing%20.pdf |
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