High performance of stretchable carbon nanotube–polypyrrole fiber supercapacitors under dynamic deformation and temperature variation. Issue 23 (31st May 2016)

• Record Type: Journal Article
• Authors: Guo, F. M.; Xu, R. Q.; Cui, X.; Zhang, L.; Wang, K. L.; Yao, Y. W.; Wei, J. Q.
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 23(2016)
• Page Start: 9311
• Page End: 9318
• Publication Date: 2016-05-31
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta02437h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Fiber-shaped supercapacitors (FSSCs) are fabricated from CNT–PPy composite networks. The FSSCs exhibit outstanding capacitive performance with a high specific capacitance of 69 F g −1 . The FSSCs are stable and reliable under static and dynamic stretching, and wide temperature variation. Abstract : Flexible fiber-shaped supercapacitors have great potential in wearable electronic devices. Here, we fabricate CNT–PPy composite films by an electrochemical deposition method from macroscopic CNT films. The composite films are transformed into flexible fibers with ultralow density by drawing through several diamond wire-drawing dies. The CNT–PPy fibers have outstanding electrochemical properties with a high specific capacitance of 302 F g −1 in 1 M H2 SO4 liquid electrolyte. Flexible, stretchable, all-solid-state, fiber-shaped supercapacitors are then fabricated from the CNT–PPy fibers using H3 PO4 –poly(vinyl alcohol) as gel electrolyte. The supercapacitor has a high specific capacitance of 69 F g −1, a high power density and an energy density of 3.8 kW kg −1 and 3.6 W h kg −1, respectively. The fiber-shaped supercapacitor also exhibits high stability and reliability under static and dynamic stretching, and also in a wide temperature range from −27 °C to 61 °C.