Journal article
Performance stability of solid-state polypyrrole-reduced graphene oxide-modified carbon bundle fiber for supercapacitor application
Electrochimica Acta, Vol.285, pp.9-15
2018
Abstract
The stability performance of a solid-state polypyrrole-reduced graphene oxide (PPy-rGO) supercapacitor electrode after a series of charging-discharging cycles is investigated. The electrochemical performances show that the capacity retention, specific capacitance, equivalent series resistance, and charge transfer resistance all decrease after charging-discharging cycles. Thermogravimetric analysis shows the degradation of electroactive materials, causing decreased electrochemical performance of PPy-rGO. The morphology changes reveal that the pore size is reduced by ∼12 μm at the 1000th charge-discharge cycle, which limits the diffusion of electrolyte ions into the electrode. The positive shifts in the binding energy of the N1s spectra at the 500th and 1000th charge-discharge cycles indicate the formation of a hydrogen-bridge bond, affecting the electron transfer in the PPy-rGO composite as observed through X-ray photoelectron spectroscopy. Moreover, the structural properties of rGO change from amorphous to graphitic after a series of charging-discharging processes, as shown by the Raman spectra. Furthermore, the peak of the NH bending vibration is red-shifted by approximately 108 cm−1, indicating the changes in the chemical environment after a series of charging-discharging cycles, as shown by Fourier transform infrared spectroscopy.
Details
- Title
- Performance stability of solid-state polypyrrole-reduced graphene oxide-modified carbon bundle fiber for supercapacitor application
- Authors/Creators
- A.A.B. Hamra (Author/Creator) - Universiti Putra MalaysiaH.N. Lim (Author/Creator) - Universiti Putra MalaysiaS.M. Hafiz (Author/Creator) - Universiti Putra MalaysiaS. Kamaruzaman (Author/Creator) - Universiti Putra MalaysiaS.A. Rashid (Author/Creator)R. Yunus (Author/Creator) - Universiti Putra MalaysiaM. Altarawneh (Author/Creator) - Murdoch UniversityZ-T Jiang (Author/Creator) - Murdoch UniversityN.M. Huang (Author/Creator) - New Energy Science and Engineering, University of Xiamen Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor Darul Ehsan, Malaysia
- Publication Details
- Electrochimica Acta, Vol.285, pp.9-15
- Publisher
- Elsevier
- Identifiers
- 991005540138207891
- Copyright
- © 2018 Elsevier Ltd.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 2 Chemistry
- 2.62 Electrochemistry
- 2.62.52 Electrode Materials
- Web Of Science research areas
- Electrochemistry
- ESI research areas
- Chemistry