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Three-dimensional reticulate CNT-aerogel for high mechanical flexibility fiber supercapacitor

Abstract

In recent years, the rapid development of portable and wearable electronic products has promoted the prosperity of fiber supercapacitors (FSCs), which serves as flexible and lightweight energy supply devices. However, research on FSCs is still in its infancy and the energy density of FSCs are far below the level of the ion battery. Here, we report a facile method to prepare a novel fibrous CNT-aerogel by electrochemical activation and freeze-drying. The fibrous CNT-aerogel electrode possesses large specific surface area, high mechanical strength, excellent electrical conductivity, as well as a high specific capacitance of 160.8 F g-1 at 0.5 mA and long cyclic stability. Then we assembled a non-faradaic FSC based on fibrous CNT-aerogel as electrodes and P(VDF-HFP)/EMIMBF4 ionogel as electrolyte. The introduction of the ionogel electrolyte increases the operating voltage of the FSC to 3V, and makes the device combine the intrinsic high power density (27.3 kW kg-1) of non-faradaic SCs with an ultrahigh energy density of 29.6 Wh kg-1, which has reached the level of lithium-ion batteries. More importantly, the assembled FSCs show excellent flexibility and bending-stability, and can still operate normally within a wide working temperature window (0~80 °C). The outstanding electrochemical performance and the mechanical/thermal stability indicate the assembled FSC device is a promising power source for flexible electronics.

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Publication details

The article was received on 09 Mar 2018, accepted on 16 Apr 2018 and first published on 17 Apr 2018


Article type: Paper
DOI: 10.1039/C8NR01991F
Citation: Nanoscale, 2018, Accepted Manuscript
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    Three-dimensional reticulate CNT-aerogel for high mechanical flexibility fiber supercapacitor

    Y. Li, Z. Kang, X. Yan, S. Cao, M. Li, Y. Guo, Y. Huan, X. Wen and Y. Zhang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR01991F

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