A High-Performance, Low Defected, and Binder-free Graphene-based Supercapacitor Obtained via Synergistic Electrochemical Exfoliation and Electrophoretic Deposition Process.

Autor: Abdillah OB; Institut Teknologi Bandung, Department of Physics, Faculty of Mathematics and Natural Sciences, Jalan Ganesha 10, 40132, Bandung, INDONESIA., Jaoh FL; Universitas Islam Negeri Sunan Gunung Djati, Department of Physics, Faculty of Science and Technology, Jl. A. H. Nasution 105, 40614, Bandung, INDONESIA., Fitriani P; Institut Teknologi Bandung, Department of Physics, Faculty of Mathematics and Natural Sciences, Jalan Ganesha 10, 40132, Bandung, INDONESIA., Nuryadin BW; Universitas Islam Negeri Sunan Gunung Djati, Department of Physics, Faculty of Science and Technology, 40614, Bandung, INDONESIA., Aimon AH; Institut Teknologi Bandung, Department of Physics, Faculty of Mathematics and Natural Sciences, Jalan Ganesha 10, 40132, Bandung, INDONESIA., Iskandar F; Institut Teknologi Bandung, Department of Physics, Faculty of Mathematics and Natural Sciences, Jalan Ganesha 10, 40132, Bandung, INDONESIA.
Jazyk: angličtina
Zdroj: Chemistry, an Asian journal [Chem Asian J] 2024 Jul 02, pp. e202400548. Date of Electronic Publication: 2024 Jul 02.
DOI: 10.1002/asia.202400548
Abstrakt: An integrated electrochemical exfoliation and electrophoretic deposition (EPD) method is developed to achieve a high performance graphene supercapacitor. The electrochemical delamination of graphite sheet has obtained a low defected few-layer graphene adorned with oxygen-containing functional groups. Then, the EPD process produced a binder-free electrode to alleviate the graphene restacking problem. The electrode prepared using a deposition voltage of 5V exhibits the highest specific capacitance of 145.95 F/g at 0.5 A/g from three-electrode measurement. Moreover, this EPD-prepared electrode also demonstrates superior electrochemical properties compared to electrodes fabricated using PVDF binder. In the real symmetrical cell, the EPD-prepared electrode also shows excellent performance with a high rate capability of 82.31% (from 0.5 A/g to 10 A/g), high cycling stability of 95.00% (at 5 A/g) after 10,000 cycles, and rapid frequency response with short relaxation time (τ₀) of 9.73 ms. These results indicate that this integration method is beneficial to construct a high performance binder-free supercapacitor electrode consisting of low-defected graphene materials, low electrode resistance, and less agglomeration of graphene sheets by utilizing an environmentally friendly process.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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