Preparation of hollow mesoporous carbon spheres and their performances for electrochemical applications

Quality in Research: International Symposium on Materials, Metallurgy, and Chemical Engineering

材料科学;冶金学;化学工业

Ariyanto, T.^1,2 ; Zhang, G.R.^2,3 ; Kern, A.^2 ; Etzold, B.J.M.^2,3

Department of Chemical Engineering, Universitas Gadjah Mada, Jl Grafika 2, Yogyakarta

55281, Indonesia^1

Lehrstuhl für Chemische Reaktionstechnik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, Erlangen

91058, Germany^2

Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 8, Darmstadt

6428, Germany^3

关键词: Carbide derived carbon;    Characterization methods;    Electric double-layer capacitor (EDLC);    Electrochemical applications;    Energy storage and conversions;    Hollow carbon spheres;    Methanol Oxidation;    Temperature programmed oxidation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/316/1/012018/pdf
DOI  :  10.1088/1757-899X/316/1/012018

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Hollow carbon materials have received intensive attention for energy storage/conversion applications due to their attractive properties of high conductivity, high surface area, large void and short diffusion pathway. In this work, a novel hollow mesoporous material based on carbide-derived carbon (CDC) is presented. CDC is a new class of carbon material synthesized by the selective extraction of metals from metal carbides. With a two-stage extraction procedure of carbides with chlorine, firstly hybrid core-shell carbon particles were synthesized, i.e. mesoporous/graphitic carbon shells covering microporous/amorphous carbon cores. The amorphous cores were then selectively removed from particles by a careful oxidative treatment utilizing its low thermal characters while the more stable carbon shells remained, thus resulting hollow particles. The characterization methods (e.g. N2sorption, Raman spectroscopy, temperature-programmed oxidation and SEM) proved the successful synthesis of the aspired material. In electric double-layer capacitor (EDLC) testing, this novel hollow core material showed a remarkable enhancement of EDLC's rate handling ability (75% at a high scan rate) with respect to an entirely solid-mesoporous material. Furthermore, as a fuel cell catalyst support the material showed higher Pt mass activity (a factor of 1.8) compared to a conventional carbon support for methanol oxidation without noticeably decreasing activity in a long-term testing. Therefore, this carbon nanostructure shows great promises as efficient electrode materials for energy storage and conversion systems.