新型炭材料2011，Vol.26Issue(3)：204-210,7.
硝酸氧化对沥青烯基有序介孔炭电化学性能的影响
The influence of nitric acid oxidation on the electrochemical performance of asphaltene-based ordered mesoporous carbon
摘要
Abstract
Asphaltene-based ordered mesoporous carbon ( OMC) was oxidized with 5 mol/L nitric acid at 40-100 ℃ . The influence of nitric acid oxidation treatment on its textural properties and electrochemical performance as a supercapacitor electrode material was investigated and the ionic transport behavior in relation to surface chemical structure was discussed. The pore structures and electrochemical performance were examined using XRD, nitrogen adsorption and an electrochemical workstation. Results indicate that electrochemical performance can be improved with nitric acid treatment under mild conditions. The regular mesostructure can be retained, and the surface areas and pore volumes vary slightly when oxidation temperature is below 60 ℃ . A capacitor assembled with the OMC sample oxidized at 60℃ exhibits excellent electric double layer behavior, improved frequency response characteristics and a fast charge-discharge rate with a time constant of 6s. The gravimetric specific capacitance and energy density of OMC oxidized at 60 ℃ are 138 F·g-1 and 3. 9 Wh.kg-1 respectively at a scanning rate of 5 mV·s-1. These values are respectively 57％ and 63％ greater than for the un-treated one.关键词
沥青烯/有序介孔炭/氧化/电容器Key words
Asphaltene/ Ordered mesoporous carbon/ Oxidation/ Supercapacitor分类
化学化工引用本文复制引用
王六平,周颖,邱介山..硝酸氧化对沥青烯基有序介孔炭电化学性能的影响[J].新型炭材料,2011,26(3):204-210,7.基金项目
国家自然科学基金项目(90610003,20725619,20836002) （90610003,20725619,20836002）
国家863项目(2009AA05Z318). （2009AA05Z318）
