Structure and Electrochemical Performance of Carbide‐Derived Carbon Nanopowders

Advanced Functional Materials - Tập 23 Số 8 - Trang 1081-1089 - 2013
Carlos R. Pérez1, Sun‐Hwa Yeon2, Julie Ségalini3, Volker Presser1, Pierre‐Louis Taberna3, Patrice Simon3, Yury Gogotsi1
1Department of Materials Science and Engineering and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USA
2Distributed Power Generation and Energy Storage Group, Korea Institute of Energy Research, Daejeon, 305‐343, South Korea
3Universite Paul Sabatier, CIRIMAT UMR-CNRS 5085, 118 route de Narbonne 31062 Toulouse Cedex 9–France, Réseau National sur le Stockage Electrochimique de l'Energie, FR CNRS n 3459

Tóm tắt

AbstractMicroporous carbon materials are widely used in gas storage, sorbents, supercapacitor electrodes, water desalination, and catalyst supports. While these microporous carbons usually have a particle size in the 1–100 μm range, here the synthesis of porous carbide‐derived carbon (CDC) with particle diameters around 30 nm by extraction of titanium from nanometer‐sized titanium carbide (TiC) powder at temperatures of 200 °C and above is reported. Nanometer‐sized CDCs prepared at 200–400 °C show a disordered structure and the presence of CN sp1 bonds. Above 400 °C, the CN bond disappears with the structure transition to disordered carbon similar to that observed after synthesis from carbide micropowders. Compared to CDCs produced from micrometer‐sized TiC, nano‐CDC has a broader pore size distribution due to interparticle porosity and a large contribution from the surface layers. The material shows excellent electrochemical performance due to its easily accessible pores and a large specific surface area.

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Advanced Functional Materials

Tập 23 Số 8

1081-1089

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