Issue 46, 2023

MXene decorated 3D-printed carbon black-based electrodes for solid-state micro-supercapacitors

Abstract

Three-dimensional (3D) printing offers a unique approach to fabricating free-standing and complex structured electrodes for high-performance micro-supercapacitors (MSCs). Among the different 3D-printing techniques, fused deposition modeling (FDM) is a promising technique for upscaling due to its low price and maturity in industry. Herein, a conductive carbon black-based 3D-printable filament is designed to be used as a free-standing electrode after FDM printing, solvent activation, and MXene coating. The MXene layers could provide higher capacitances due to the pseudocapacitive charge storage mechanism and high metallic conductivity. In a three-electrode test system, the MXene decorated 3D-printed electrode (MXene@PTC-12 h) shows a capacitance of 30.2 mF cm−2 at a current density of 0.1 mA cm−2. With polyvinyl alcohol (PVA)/H2SO4 gel electrolyte, the MSCs based on the 3D printed electrodes provide a specific capacitance of 20.8 mF cm−2 at a current density of 0.1 mA cm−2 and a stable cycle life with 95% capacitance retention after 10 000 cycles. The method in this work offers a new way to prepare customized free-standing electrodes for high-performance energy storage devices.

Graphical abstract: MXene decorated 3D-printed carbon black-based electrodes for solid-state micro-supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
01 Aug. 2023
Accepted
30 Sept. 2023
First published
20 Okt. 2023

J. Mater. Chem. A, 2023,11, 25422-25428

MXene decorated 3D-printed carbon black-based electrodes for solid-state micro-supercapacitors

G. Zhu, Y. Hou, J. Lu, H. Zhang, Z. Zhuang, M. M. Baig, M. Z. Khan, M. A. Akram, S. Dong, P. Liu, X. Ge and Y. Zhang, J. Mater. Chem. A, 2023, 11, 25422 DOI: 10.1039/D3TA04573K

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