Abstract
This article reports the use of crystalline nickel phosphate/carbon fibres (NiPh/CFs) nanocomposite as an electrode material for pseudocapacitor applications. The NiPh particles are synthesised by a cost-effective one-pot method, which is based on refluxing nickel and phosphate precursors at 90 °C. The crystallinity and structural morphologies of the synthesised particles are characterised by X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM). Also, the N2 adsorption/desorption isotherms are recorded. The Brunauer–Emmett–Teller (BET) method is used to calculate the specific surface area. The electrochemical performances of pristine NiPh and NiPh/CFs composite electrodes are investigated in an alkaline solution of 0.5 M of KOH. The specific capacitances were calculated using cyclic voltammograms at a potential scan rate of 100 mV s− 1. For the pristine electrode, the calculated specific capacitance was 4.3 F g− 1 and for the composite NiPh/CFs electrode, it was 699.2 F g− 1. The significant improvement in the performance is attributed to the high surface area and enhanced electronic conductivity of the NiPh/CFs composite electrode. Also, the composite electrode shows outstanding stability and delivers 1000 cycles with excellent capacitance retention.
Graphical abstract
A cost-effective material for high-performance pseudocapacitors: Crystalline NiPh nanoparticles have been synthesised at 90 °C. SEM image shows the pseudocapacitors composite electrode fabricated by mixing the NiPh with CFs. The electrode delivers a specific capacitance of 699.2 F g−1; calculated from the cyclic voltammogram shown in the figure. Also, the composite electrode shows good stability and provides 1000 cycles with excellent capacitance retention.
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The authors thank the Deanship of Scientific Research at King Faisal University for the financial support (Project Number 186061).
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Abdelsalam, M.E., Elghamry, I., Touny, A.H. et al. Nickel phosphate/carbon fibre nanocomposite for high-performance pseudocapacitors. J Appl Electrochem 49, 45–55 (2019). https://doi.org/10.1007/s10800-018-1279-y
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DOI: https://doi.org/10.1007/s10800-018-1279-y