Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system
In this work, we report the fabrication of a high-voltage flexible supercapacitor that is able to store energy harvested from a 3D-printed wearable human motion energy harvester and provide power supply to other wearable devices. To bestow the electrode with flexibility, poly(vinylidene fluoride-co-...
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| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/139339 |
| _version_ | 1811676583570702336 |
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| author | He, Ke Wong, Ting Chong Lau, Gih Sheng |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering He, Ke Wong, Ting Chong Lau, Gih Sheng |
| author_sort | He, Ke |
| collection | NTU |
| description | In this work, we report the fabrication of a high-voltage flexible supercapacitor that is able to store energy harvested from a 3D-printed wearable human motion energy harvester and provide power supply to other wearable devices. To bestow the electrode with flexibility, poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) is incorporated with single-walled carbon nanotube (SWCNT) as electrode material, which dramatically decreases its Young’s modulus. Furthermore, the supercapacitor is sandwiched between self-healing layers that protects the device from mechanical failure caused by motion when mounted on the human body as wearable device. Owing to the use of ionic liquid, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4), as the electrolyte, the supercapacitor can be charged up to 2.5 V. This wide electrochemical window, with low equivalent series resistance (ESR), enhances the power and energy densities of the supercapacitor to 11 kW kg− 1 and 23 Wh kg− 1. The device presents excellent flexibility and mechanical durability. We realized a wearable self-powered and self-sustaining system by the integration of the as-prepared supercapacitor with a 3D-printed mechanical energy harvesting knee brace. Harvested energy generated by a tester wearing the system was sufficient to light up an LED light in a demonstration. |
| first_indexed | 2024-10-01T02:23:47Z |
| format | Journal Article |
| id | ntu-10356/139339 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:23:47Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1393392023-07-14T16:04:10Z Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system He, Ke Wong, Ting Chong Lau, Gih Sheng School of Materials Science & Engineering Engineering::Materials Supercapacitor Energy Harvesting In this work, we report the fabrication of a high-voltage flexible supercapacitor that is able to store energy harvested from a 3D-printed wearable human motion energy harvester and provide power supply to other wearable devices. To bestow the electrode with flexibility, poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) is incorporated with single-walled carbon nanotube (SWCNT) as electrode material, which dramatically decreases its Young’s modulus. Furthermore, the supercapacitor is sandwiched between self-healing layers that protects the device from mechanical failure caused by motion when mounted on the human body as wearable device. Owing to the use of ionic liquid, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4), as the electrolyte, the supercapacitor can be charged up to 2.5 V. This wide electrochemical window, with low equivalent series resistance (ESR), enhances the power and energy densities of the supercapacitor to 11 kW kg− 1 and 23 Wh kg− 1. The device presents excellent flexibility and mechanical durability. We realized a wearable self-powered and self-sustaining system by the integration of the as-prepared supercapacitor with a 3D-printed mechanical energy harvesting knee brace. Harvested energy generated by a tester wearing the system was sufficient to light up an LED light in a demonstration. Accepted version This work was supported by Ministry of Education Singapore under the Translational R&D and Innovation Fund grant number MOE2014-TIF-1-G-010. 2020-05-19T02:55:23Z 2020-05-19T02:55:23Z 2018 Journal Article He, K., Wong, T. C., & Lau, G. S. (2018). Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system. Journal of Applied Electrochemistry, 49, 79-86. doi:10.1007/s10800-018-1274-3 0021-891X https://hdl.handle.net/10356/139339 10.1007/s10800-018-1274-3 2-s2.0-85056730187 49 79 86 en MOE2014-TIF-1-G-010 Journal of Applied Electrochemistry © 2018 Springer Science+Business Media. This is a post-peer-review, pre-copyedit version of an article published in Journal of Applied Electrochemistry. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10800-018-1274-3 application/pdf |
| spellingShingle | Engineering::Materials Supercapacitor Energy Harvesting He, Ke Wong, Ting Chong Lau, Gih Sheng Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system |
| title | Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system |
| title_full | Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system |
| title_fullStr | Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system |
| title_full_unstemmed | Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system |
| title_short | Ionic liquid-based high-voltage flexible supercapacitor for integration with wearable human-powered energy harvesting system |
| title_sort | ionic liquid based high voltage flexible supercapacitor for integration with wearable human powered energy harvesting system |
| topic | Engineering::Materials Supercapacitor Energy Harvesting |
| url | https://hdl.handle.net/10356/139339 |
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