Synthesis of non-planar graphene-wrapped copper nanoparticles with iron(III) oxide decoration for high performance supercapacitors. (9th July 2023)

• Record Type: Journal Article
• Authors: Chu, Hsuan-I; Ho, Hsiao-Yun; Huang, Yi-June; Tsai, Dung-Sheng; Lee, Chuan-Pei
• Is Part Of: Nanotechnology. Volume 34:Number 28(2023)
• Publication Date: 2023-07-09
• Subjects: chemical vapor deposition -- flexible electrode -- graphene -- Iron(III) oxide -- supercapacitor; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/acca8a
• 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 iron(III) oxide (Fe2 O3 ) and multilayer graphene-wrapped copper nanoparticles (Fe2 O3 /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 Fe2 O3 is further deposited on the MLG-Cu NPs/CC via successive ionic layer adsorption and reaction method. The related material characterizations of Fe2 O3 /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 (GCD) and electrochemical impedance spectroscopy measurements. The flexible electrode with Fe2 O3 /MLG-Cu NPs composites exhibits the best specific capacitance of 1092.6 mF cm −2 at 1 A g −1, which is much higher than those of electrodes with Fe2 O3 (863.7 mF cm −2 ), MLG-Cu NPs (257.4 mF cm −2 ), multilayer graphene hollow balls (MLGHBs, 14.4 mF cm −2 ) and Fe2 O3 /MLGHBs (287.2 mF cm −2 ). Fe2 O3 /MLG-Cu NPs electrode also exhibits an excellent GCD durability, and its capacitance remains 88% of its original value after 5000 cycles of the GCD process. Finally, a supercapacitor system consisted of four Fe2 O3 /MLG-Cu NPs/CC electrodes can efficiently power various light-emitting diodes (i.e. red, yellow, green, and blue lights), demonstrating the practical application of Fe2 O3 /MLG-Cu NPs/CC electrode.