Bamboo-like, oxygen-doped carbon tubes with hierarchical pore structure derived from polymer tubes for supercapacitor applications
Bamboo-like, oxygen-doped carbon tubes with hierarchical pore structure derived from polymer tubes for supercapacitor applications
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DOI：
10.1007/s10853-017-1064-z
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发表时间：
2017-04
影响因子：
4.5
通讯作者：
Zhenyu Xu;Yijiang Liu;Hongbiao Chen;Mei Yang;Hua-ming Li
中科院分区：
文献类型：
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作者：
Zhenyu Xu;Yijiang Liu;Hongbiao Chen;Mei Yang;Hua-ming Li
本文采用双交联聚二乙烯苯（PDVB）管的直接热解法制备了具有层次孔结构的竹状o掺杂碳管。以BF3/Et2O配合物为引发剂，采用二乙烯苯在环己烷中阳离子聚合的方法，首次合成了竹状交联PDVB管。以无水alcl3为催化剂，在ccl4中通过Friedel-Crafts反应进行二次交联后，得到的双交联羧酸官能化PDVB管直接进行热解，得到竹状o掺杂多孔碳。所制得的o掺杂多孔碳管（BCTF-900, 900℃热解）具有三模态孔隙结构（微孔、中孔和大孔），具有较高的比表面积（595 m2 - 1）和较低的总孔体积（0.37 cm - 3 - 1）。这种竹状碳管具有良好的体积电容性能（在0.5 A g−1时为254 F cm−3），中等的体积能量密度（在428 W L−1时为12.9 Wh L−1）和优异的循环稳定性（在2 A g−1下循环10000次后电容保持率保持在96.9%）。pdvb衍生碳管具有独特的竹状结构和三模态孔隙结构，具有广泛的应用前景。
In this paper, bamboo-like, O-doped carbon tubes with hierarchical pore structure have been fabricated by the direct pyrolysis of dual cross-linked polydivinylbenzene (PDVB) tubes. The bamboo-like, cross-linked PDVB tubes are firstly synthesized by cationic polymerization of divinylbenzene in cyclohexane using BF3/Et2O complex as the initiator. After a secondary cross-linking being imposed by Friedel–Crafts reaction in CCl4using anhydrous AlCl3as the catalyst, the obtained dual cross-linked, carboxylic acid functionalized PDVB tubes are directly subjected to pyrolysis, yielding bamboo-like, O-doped porous carbons. The resultant O-doped porous carbon tubes (BCTF-900, pyrolyzed at 900 °C) exhibit a trimodal pore structure (micro-, meso-, and macropores) with a relatively high specific surface area of 595 m2g−1and a low total pore volume of 0.37 cm3g−1. Such bamboo-like carbon tubes display good volumetric capacitive performance (254 F cm−3at 0.5 A g−1), moderate volumetric energy density (12.9 Wh L−1at 428 W L−1), and excellent cycling stability (the capacitance retention has remained at 96.9% after 10000 cycles at 2 A g−1). Due to their unique bamboo-like architecture and trimodal pore structure, the PDVB-derived carbon tubes should have widely application prospect.