物理化学学报 >> 2007, Vol. 23 >> Issue (09): 1399-1404.doi: 10.3866/PKU.WHXB20070917

研究论文 上一篇    下一篇

有序中孔炭的电化学储氢性能

刘宇林; 李丽霞; 陈晓红; 宋怀河   

  1. 北京化工大学化工资源有效利用国家重点实验室, 北京 100029
  • 收稿日期:2007-01-30 修回日期:2007-05-18 发布日期:2007-09-06
  • 通讯作者: 宋怀河 E-mail:songhh@mail.buct.edu.cn

The Electrochemical Hydrogen Storage Properties of Ordered Mesoporous Carbons

LIU Yu-Lin; LI Li-Xia; CHEN Xiao-Hong; SONG Huai-He   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2007-01-30 Revised:2007-05-18 Published:2007-09-06
  • Contact: SONG Huai-He E-mail:songhh@mail.buct.edu.cn

摘要: 将蔗糖、聚环氧乙烯-聚环氧丙烯-聚环氧乙烯三嵌段共聚物和硅源构成的复合物进行预炭化、炭化和除硅处理合成出有序中孔炭, 采用XRD、TEM、HRTEM和N2吸脱附等手段对其进行表征, 并将有序中孔炭制成电极开展恒流充放电储氢性能研究. 结果显示, 具有较高比表面积(720 m2·g-1)和孔容(0.86 cm3·g-1)的有序中孔炭材料的电化学储氢容量为70.1 mAh·g-1, 高于具有相对较低比表面积(610 m2·g-1)和孔容(0.66 cm3·g-1)的有序中孔炭储氢容量(64.1 mAh·g-1). 通过与单壁碳纳米管电极(25.9 mAh·g-1)的对比, 表明有序中孔炭具有良好的电化学储氢性能和更高的电化学活性.

关键词: 有序中孔炭, 电化学储氢, 氢吸附

Abstract: Ordered mesoporous carbon materials were successfully synthesized by an easy method of the carbonization of sulfuric-acid-treated silica/triblock copolymer/sucrose composites. The morphologies, structures and pore characteristics of the carbon materials were investigated by X-ray diffraction (XRD), nitrogen adsorption desorption and transmission electron microscopy (TEMand HRTEM) measurements. On the basis of comparing the surface areas and pore properties of two ordered mesoporous carbons obtained by changing the content of the reactants, their electrochemical hydrogen storage capacities were tested by Galvanostatic charge-discharge measurement. The results showed that the carbon material (C-P) with higher specific surface area (720 m2·g-1) and pore volume (0.86 cm3·g-1) had higher hydrogen storage capacity (70.1 mAh·g-1) than the carbon material (C-S) (64.1 mAh·g-1) with lower specific surface area (610 m2·g-1) and pore volume (0.66 cm3·g-1). Both of the two ordered mesoporous carbons exhibited higher hydrogen storage capacities than the single-walled carbon nanotubes (25.9 mAh·g-1). The cyclic voltammetry measurement indicated that the ordered mesoporous carbon electrode possessed higher electrochemical activity than single-walled carbon nanotubes electrode.

Key words: Ordered mesoporous carbon, Electrochemical hydrogen storage, Hydrogen adsorption

MSC2000: 

  • O646