Synthesis of graphitic ordered macroporous carbon with a three-dimensional interconnected pore structure for electrochemical applications
Synthesis of graphitic ordered macroporous carbon with a three-dimensional interconnected pore structure for electrochemical applications
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DOI：
10.1021/jp0541967
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发表时间：
2005-11-03
影响因子：
3.3
通讯作者：
Lee, JY
中科院分区：
文献类型：
--
作者：
Su, FB;Zhao, XS;Lee, JY
本研究以逆硅蛋白石为模板，采用化学气相沉积（CVD）法制备了具有三维（3D）互连孔结构和石墨孔壁的有序大孔碳。采用场发射扫描电镜、透射电镜、x射线衍射、拉曼光谱、氮吸附和热重分析技术对碳样品进行了表征。考察了碳基材料作为锂离子电池碳基阳极和作为室温甲醇电化学氧化Pt催化剂载体的电化学性能。结果表明，CVD方法是制备碳纳米结构的一种简单方法，可获得具有石墨状孔壁和均匀孔的碳。碳的石墨性质提高了锂离子电池的倍率性能和可循环性。结果表明，负载SnO2纳米粒子后，碳的比容量进一步提高。碳材料负载Pt催化剂的室温甲醇电化学氧化比活性高于商用Pt催化剂（E-TEK）。
In this study, ordered macroporous carbon with a three-dimensional (3D) interconnected pore structure and a graphitic pore wall was prepared by chemical vapor deposition (CVD) of benzene using inverse silica opal as the template. Field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectrometry, nitrogen adsorption, and thermogravimetric analysis techniques were used to characterize the carbon samples. The electrochemical properties of the carbon materials as a carbon-based anode for lithium-ion batteries and as a Pt catalyst support for room-temperature methanol electrochemical oxidation were examined. It was observed that the CVD method is a simple route to fabrication of desired carbon nanostructures, affording a carbon with graphitic pore walls and uniform pores. The graphitic nature of the carbon enhances the rate performance and cyclability in lithium-ion batteries. The specific capacity was found to be further improved when SnO2 nanoparticles were supported on the carbon. The specific activity of Pt catalyst supported on the carbon materials for room-temperature methanol electrochemical oxidation was observed to be higher than that of a commercial Pt catalyst (E-TEK).