Boron-doped ordered mesoporous carbons for the application of supercapacitors
Boron-doped ordered mesoporous carbons for the application of supercapacitors
复制标题
硼掺杂有序介孔碳在超级电容器中的应用
DOI：
10.1016/j.electacta.2016.05.013
复制
发表时间：
2016-07-20
影响因子：
6.6
通讯作者：
Liu, Min
中科院分区：
文献类型：
--
作者：
Gao, Jiao;Wang, Xianyou;Liu, Min
分别以KIT-6氧化硅、糠醇和硼酸为模板剂、碳源和硼源，采用纳米浇铸法制备了不同硼含量的硼掺杂有序介孔炭（BOMCs）。利用氮气吸附/脱附等温线、透射电子显微镜（TEM）和X射线光电子能谱（XPS）对样品的孔结构、形貌和表面物理化学性质进行了表征。结果表明，BOMC继承了原始OMC的有序介观结构，并在表面上具有一些硼掺杂物种。采用循环伏安法（CV）、恒电流充放电（GCD）、电化学阻抗谱（EIS）和循环寿命测试等方法对BOMCs的电化学性能进行了表征。结果表明，随着硼含量的增加，BOMC-0.05在5 mV·s（1）的扫描速率下表现出较高的比电容（267.8F·g（1））和较低的电阻。同时，使用BOMC-0.05作为电极的对称超级电容器显示出高达69.8F g（1）的比电容和优异的循环稳定性，即使在10000次连续循环后，比电容保持率仍为92%。这些优异的电化学性能表明，BOMCs是一种很有前途的超级电容器电极材料。(C)2016爱思唯尔有限公司版权所有
The boron-doped ordered mesoporous carbons (BOMCs) with different boron content are prepared by nanocasting approach using silica KIT-6, furfuryl alcohol and boric acid as the template, carbon and boron sources, respectively. The pore structure, morphology and surface physicochemical properties of the BOMCs samples are characterized by nitrogen adsorption/desorption isotherm, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results demonstrate that BOMCs inherit the ordered mesostructure of the pristine OMC and possess some boron-doped species on the surface. The electrochemical performances of the BOMCs are characterized by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) test, electrochemical impedance spectroscopy (EIS) and cycle life measurement. It has been found that with the increase of the boron content, the BOMC-0.05 shows high specific capacitance of 267.8 F g (1) at the scan rate of 5 mV s (1) and low resistance. At the same time, the symmetrical supercapacitor using BOMC-0.05 as electrode shows a specific capacitance of as high as 69.8 F g (1) and excellent cyclic stability with the specific capacitance retention of 92% even after 10000 consecutive cycles. The remarkable electrochemical behaviors demonstrate that the BOMCs will be a promising electrode material for the application of supercapacitors. (C) 2016 Elsevier Ltd. All rights reserved.