Zhang Yan, Ma Bing'e, Liu Yujian
Key Laboratory of Specially Functional Polymeric Materials and Related Technology, Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology MeiLong Road 130 Shanghai 200237 PR China
RSC Adv. 2018 May 14;8(32):17629-17634. doi: 10.1039/c8ra01455h.
Boron-doped ordered mesoporous carbon (B-OMC) was synthesized using the aromatic compounds benzene, 1,3,5-trimethylbenzene, 1,3,5-triethylbenzene and 1,3,5-triisopropylbenzene as expanding agents. The expanding mechanism as well as the effect of the expanding agent molecule on the properties of B-OMCs were studied. Compared with the unmodified one, the order of B-OMCs treated with aromatic compounds is improved significantly. In addition, along with the increase in hydrophobicity and steric hindrance of the expanding agents, the pore size and pore volume of B-OMCs increase, while their surface area and specific capacitance increase first, and then drop off slightly. The obtained B-OMC-TEB has a high boron content (1.54 wt%), the largest surface area (693 m g), a much better electrochemical performance and the highest specific capacitance (290 F g), 30% higher than that of ordinary B-OMC. Furthermore, the specific capacitance can be maintained at 155 F g even at a high current density of 20 A g, indicating that it has a high capacitance retention rate.
以芳香族化合物苯、1,3,5-三甲基苯、1,3,5-三乙基苯和1,3,5-三异丙基苯作为扩孔剂合成了硼掺杂有序介孔碳（B-OMC）。研究了扩孔机理以及扩孔剂分子对B-OMC性能的影响。与未改性的B-OMC相比，用芳香族化合物处理后的B-OMC的有序度显著提高。此外，随着扩孔剂疏水性和空间位阻的增加，B-OMC的孔径和孔体积增大，而其比表面积和比电容先增大，然后略有下降。所制备的B-OMC-TEB具有高硼含量（1.54 wt%）、最大比表面积（693 m²/g）、更好的电化学性能和最高比电容（290 F/g），比普通B-OMC高30%。此外，即使在20 A/g的高电流密度下，比电容仍可保持在155 F/g，表明其具有高电容保持率。
