Polypyrrole-coated copper@graphene core-shell nanoparticles for supercapacitor application. (19th March 2023)

• Record Type: Journal Article
• Authors: Ho, Hsiao-Yun; Chu, Hsuan-I; Huang, Yi-June; Tsai, Dung-Sheng; Lee, Chuan-Pei
• Is Part Of: Nanotechnology. Volume 34:Number 12(2023)
• Publication Date: 2023-03-19
• Subjects: chemical vapor deposition -- flexible electrode -- graphene -- polypyrrole -- supercapacitor; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/acad87
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: The performance of supercapacitors strongly depends on the electrochemical characterizations of electrode materials. Herein, a composite material consisted of polypyrrole (PPy) and multilayer graphene-wrapped copper nanoparticles (PPy/MLG-Cu NPs) is fabricated on a flexible carbon cloth (CC) substrate via two-step synthesis process for supercapacitor application. Where, MLG-Cu NPs are prepared on CC by one-step chemical vapor deposition synthesis approach; thereafter, the PPy is further deposited on the MLG-Cu NPs/CC via electropolymerization. The related material characterizations of PPy/MLG-Cu NPs are well investigated by scanning electron microscopic, high resolution transmission electron microscopy, Raman spectrometer and x-ray photoelectron spectroscopy; the electrochemical behaviors of the pertinent electrodes are studied by cyclic voltammogram, galvanostatic charge/discharge and electrochemical impedance spectroscopy measurements. The flexible electrode with PPy/MLG-Cu NPs composites exhibits the best specific capacitance of 845.38 F g −1 at 1 A g −1, which is much higher than those of electrodes with PPy (214.30 F g −1 ), MLG-Cu NPs (6.34 F g −1 ), multilayer graphene hollow balls (MLGHBs; 52.72 F g −1 ), and PPy/MLGHBs (237.84 F g −1 ). Finally, a supercapacitor system consisted of four PPy/MLG-Cu NPs/CC electrodes can efficiently power various light-emitting diodes (i.e. red, yellow, green and blue lighs), demonstrating the practical application of PPy/MLG-Cu NPs/CC electrode.