用于超级电容器的三维管状碳气凝胶  

Three-dimensional tubular carbon aerogel for supercapacitors

作　　者：尚启国 徐杰[1] 刘建伟[1] Qiguo Shang;Jie Xu;Jianwei Liu(Department of Chemistry,Institute of Biomimetic Materials&Chemistry,Anhui Engineering Laboratory of Biomimetic Materials,Division of Nanomaterials&Chemistry,Hefei National Research Center for Physical Sciences at the Microscale,Institute of Energy,Hefei Comprehensive National Science Center,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学化学系,安徽省仿生材料工程实验室仿生材料与化学研究所,合肥微尺度物质科学国家研究中心纳米材料与化学研究部,合肥综合性国家科学中心能源研究院,安徽合肥230026

出　　处：《中国科学技术大学学报》2022年第8期34-41,70,共9页JUSTC

基　　金：supported by the National Natural Science Foundation of China(21922204,22175164,21771168);the Joint Funds from Hefei National Synchrotron Radiation Laboratory(UN2018LHJJ);University Synergy Innovation Program of Anhui Province,China(GXXT-2020-072)。

摘　　要：三维(3D)弹性碳纳米管气凝胶是通过一种简单的基于溶液的策略,使用碲纳米线作为可回收的模板来制得。碳纳米管的管径和壁厚很大程度上取决于碲纳米线的直径和碳源。获得的具有高比表面积(高达1865 m^(2)·g^(-1))的自支撑碳纳米管气凝胶显示出作为超级电容器电极材料的潜力。此外,与MnO_(2)结合后,电容器在1 A·g^(-1)的电流下表现出360.4 F·g^(-1)的比电容,并在2000次循环后显示出97%的保持率。高功率能力和良好的稳定性使碳纳米管气凝胶成为超级电容器电极的有希望的候选者。A three-dimensional elastic carbon nanotube aerogel is fabricated via a simple solution-based strategy using Te nanowires as templates,which can be recycled.The pipe diameter and wall thickness of the carbon nanotube are strongly dependent on the diameter of the Te nanowires and carbon source.The obtained free-standing carbon nanotube aerogel with a large specific surface area(up to 1865 m^(2)∙g^(-1))is promising as an electrode material for supercapacitors.After combination with MnO_(2),the capacitor exhibits a specific capacitance of 360.4 F∙g^(-1) at a current of 1 A∙g^(-1) and retention of 97%after 2000 cycles.The high power capabilities and good stability make it a promising candidate as an electrode for supercapacitors.

关 键 词：碳纳米管气凝胶 二氧化锰 比表面积 超级电容器 

分 类 号：O648.17[理学—物理化学]