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Porous and High-Strength Graphitic Carbon/SiC Three-Dimensional Electrode for Capacitive Deionization and Fuel Cell Applications

Abstract

Three-dimensional electrodes (3DEs) offer great advantages in a variety of electrochemical applications. However, the new emerging electrochemical technologies have been posed great challenges for 3DEs in their mechanical and chemical properties. Herein, we report the preparation of 3D graphitic carbon/SiC conductive framework (3D G/SiC) by CVD method. We demonstrate that the deposited graphitic carbon layer can remarkably enhance the mechanical strength of the SiC framework (compressive strength increase from 1.24 MPa to 2.75 MPa) and provide good conductivity (15.9 S m-1). Furthermore, the 3D G/SiC can be used for flow-through capacitive deionization (CDI) cell under high feed pressure by acting as structural backbone of 3DEs. An electro-adsorption capacity of 0.5 mg cm-2 in high loading conditions is achieved by using activated carbon granules as active materials. Besides, the 3D G/SiC can serve as robust electrode for current collecting in extremely acid electrolyte for a direct biomass fuel cell, allowing for the construction of a sucrose fuel cell with a maximum volumetric power density of 0.19 mW cm-3 to light up a LED. This work opens a feasible way to fabricate high-strength carbon based 3DEs for wide applications in energy conversion and environmental treatment technologies.

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Publication details

The article was received on 11 Jul 2018, accepted on 13 Sep 2018 and first published on 13 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA06657D
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Porous and High-Strength Graphitic Carbon/SiC Three-Dimensional Electrode for Capacitive Deionization and Fuel Cell Applications

    Y. Xue, J. Xie, M. He, M. Liu, M. Xu, W. Ni and Y. Yan, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA06657D

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