Pulse-potential electrochemical fabrication of coaxial-nanostructured polypyrrole/multiwall carbon nanotubes networks on cotton fabrics as stable flexible supercapacitor electrodes with high areal capacitance
- 102 Downloads
Flexible supercapacitors (FSCs) with a high areal capacitance are essential for future wearable energy-storage devices due to the limitation of available area on the surface of the human body (< 2 m2). To achieve the performance with high areal capacitance, the surface structure of electrodes should be designed carefully. In this paper, a hierarchical composite electrode based on coaxial-nanostructured polypyrrole (PPy) and multiwall carbon nanotube (MWCNT) was electrochemical co-deposited on the surface of the MWCNT-coated cotton fabric (MCF) by a facile pulse potential method. The pulse potential co-deposition conditions-lower potential (EL), the number of cycles (NC) and EL duration time (tL)-played crucial roles in the uniform distribution of MWCNT within PPy/MWCNT composites, thickness of PPy shell and porous morphology. The three-dimension porous networks of PPy/MWCNT/MCF electrodes not only enhanced the efficiency of faradaic redox reactions but also facilitated the accessibility of the electrolyte to electrode surface, accordingly presenting an ultrahigh areal specific capacitance of 5.05 F cm−2 (0.001 V s−1) and unexceptionable cycling stability of 129.20% specific capacitance retention (1000 cycles, 0.02 V s−1). This work provides a new route to develop FSCs electrodes and shows a promising application in wearable energy-storage technology.
KeywordsPulse potential co-deposition Polypyrrole Multiwall carbon nanotubes Flexible supercapacitors Coaxial nanostructure
This research was funded by the National Natural Science Foundation of China (51303022), the Fundamental Research Funds for the Central Universities (2232015D3-17) and Industry-University-Institute Project (Booster Plan) of Shanghai Municipal Education Commission (15cxy55).
- Ford ENJ, Mendon SK, Thames SF, Ph D, Rawlins JW, Ph D (2010) X-ray Diffraction of cotton treated with neutralized vegetable oil-based macromolecular crosslinkers. J Eng Fibers Fabr 5:10–20Google Scholar
- Jie X et al (2015) Polypyrrole/reduced graphene oxide coated fabric electrodes for supercapacitor application. Org Electron Mater Phys Chem Appl 24:153–159Google Scholar
- Lachman N et al (2015) Tailoring thickness of conformal conducting polymer decorated aligned carbon nanotube electrodes for energy storage. Adv Mater Interfaces 1:1400076(1–6)Google Scholar
- Lu ZL, Sun KG, Ren S, Jiao MC (2007) Surface modification and dispersion of multi-walled carbon nanotubes. Rare Met Mater Eng 36:100–103Google Scholar
- Shen L, Mizutani M, Rodríguez-Calero GG, Hernández-Burgos K, Truong TT, Coates GW, Abruña HD (2017) Hybrid organic electrodes: the rational design and synthesis of high-energy redox-active pendant functionalized polypyrroles for electrochemical energy storage. J Electrochem Soc 164:A1946–A1951CrossRefGoogle Scholar