Boosting the energy density of a flexible TiNb2O7@CNF-based lithium-ion supercapacitor with an ionogel separator
| Autor: | Ziyou Zhou, Shanshan Pan, Haitao Zhang, Jiajia Li, Liquan Guo, Chunxian Xing |
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| Rok vydání: | 2020 |
| Předmět: |
Supercapacitor
Materials science Fabrication business.industry General Chemical Engineering General Engineering General Physics and Astronomy Separator (oil production) High voltage 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance Flexible electronics Energy storage 0104 chemical sciences Electrode Optoelectronics General Materials Science 0210 nano-technology business |
| Zdroj: | Ionics. 26:5715-5723 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-020-03717-z |
| Popis: | The growing demand for portable and flexible electronics, such as roll-up displays, electronic papers, and wearable sensing devices, has stimulated the development of flexible energy storage devices. Herein, we demonstrate the fabrication of a high-voltage solid-state flexible free-standing supercapacitor with an ionogel separator. The negative electrode, titanium niobate, was hydrothermally grown onto a carbon cloth to ensure intimate contact. And the ionogel separator is based on EMIMBF4/P(VDF-HFP)/LiTFSI to ensure safety and high voltage. Our study shows that this device could exhibit reasonable area specific capacitance, relatively wide working potential (0–4 V), and outstanding high-temperature performances. And with that, it could deliver a super-high energy density of 397.3 μWh cm−2, and almost no decay was observed after 1000 cycles. This strategy, combining high area specific capacitance electrodes (0.26 mAh cm−2) and ionogel separators, will pave a new road for the development of solid-state flexible lithium-ion supercapacitors with a high energy density. |
| Databáze: | OpenAIRE |
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