Coaxial Copper Nanowire Network Core—Polypyrrole Shell Nanocomposites as Supercapacitor Electrodes

Date

2018-11-25

Author

Ünalan, Hüsnü Emrah
Durukan, Mete Batuhan

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Metallic nanowires hold significant potential to be used in energy storage devices, such as batteries and supercapacitors due to their high surface area and electrical conductivity. Among metallic nanowires, silver nanowires so far dominated the literature due to their reproducible, controllable and large scale synthesis. Copper nanowires on the other hand are still at their infancy; but, hold strong promise to replace silver nanowires due to their comparable optoelectronic properties and low cost. In this work, hybrid nanocomposite electrodes with copper nanowire core and polypyrrole shell (Cu NW/PPy) were fabricated and electrochemically characterized. Hybrid nanocomposite electrodes were fabricated through spray deposition of Cu NW networks onto glass substrates, followed by electrochemical deposition of PPy onto Cu NW network. Electrodeposition was performed onto Cu NWs by applying a constant current in an electrolytic solution containing benzotriazole (BTA), oxalic acid and pyrrole monomer. Capacitive behavior of the hybrid coaxial nanocomposites was investigated through cyclic voltammetry, galvanostatic charge-discharge and impedance spectroscopy. Cu NWs facilitated the charge transfer and PPy behaved both as a pseudocapacitive material and as a protective shell to improve the electrochemical stability of Cu NWs. Preliminary analysis shows a specific capacitance of 0.12 mF/cm2 at a scan rate of 100 mV/s in 1 M LiClO4 in PC. Thorough analysis on the electrochemical stability and capacitive behavior of the fabricated nanocomposite electrodes will be presented in conjunction with different electrochemical coating parameters and different electrolytes

URI

https://hdl.handle.net/11511/85587

Conference Name

Materials Research Society Fall Meeting, (25 - 30 Kasım 2018)

Collections

Department of Metallurgical and Materials Engineering, Conference / Seminar

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Citation Formats

H. E. Ünalan and M. B. Durukan, “Coaxial Copper Nanowire Network Core—Polypyrrole Shell Nanocomposites as Supercapacitor Electrodes,” presented at the Materials Research Society Fall Meeting, (25 - 30 Kasım 2018), Massachusetts, Amerika Birleşik Devletleri, 2018, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/85587.