期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 201, 期 -, 页码 1-9出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2014.09.006
关键词
Carbon nanotubes; Nitrogen-doping; Capacitance; Chemical vapor deposition; Layered double hydroxides
类别
资金
- Marian Smoluchowski Krakow Research Consortium - a Leading National Research Centre KNOW - Ministry of Science and Higher Education
- National Science Centre in Poland [2699/B/T02/2009/36]
Porous N-doped carbon materials of various morphologies are prepared via chemical vapor deposition (CVD) at 700 degrees C using acetonitrile as carbon and nitrogen source and MgAl, MgCoAl, CoAl layered double hydroxides (LDHs) as template and catalyst precursors. The physicochemical properties of the carbon materials are characterized by powder X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, thermogravimetric analysis, elemental analysis, nitrogen sorption and n-nonane thermodesorption, whereas their electrochemical performance is evaluated in 6 M KOH by means of cyclic voltammetry, galvanostatic charging/discharging and electrochemical impedance spectroscopy. The choice of LDHs strongly affects the grain morphology and micropore/mesopore contribution in the synthesized carbon materials, which determines their capacitive performance. The application of Co-free LDHs leads to the carbon material consisting of irregular aggregates of plate-like particles highly doped with nitrogen (9.7 wt%) and having high specific surface area (863 m(2) g(-1)) and high capacitance (130 F g(-1)). On the other hand, the use of Co-containing LDHs results in the carbon materials predominantly made of carbon nanotubes (grown on metallic Co nanoparticles) less doped with nitrogen (2.4-3.1 wt%) and having lower specific surface area (193-225 m(2) g(-1)) and lower capacitance (15-30 F g(-1)). (C) 2014 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据