摘要
通过化学气相沉积(CVD)的方法,在碳纳米管(CNT)薄膜及其连接处沉积热解碳(PC)来限制CNTs之间的滑移。通过扫描电镜(SEM)观察发现,热解碳(PC)的沉积使得CNT表面更加平整,且表面的孔洞更加均匀。通过应力应变及亲疏水性测试发现,CNT/PC复合薄膜的拉伸强度增加了200%,水与薄膜的静态接触角由123°减小到78°。其后通过电化学沉积的方法,制备得到CNT/PC/MnO2薄膜电极材料,通过电化学测试得知,在1 mA/cm^2的电流下单电极的比电容为326 mF/cm^2,可以稳定循环10000圈,电容的保持率稳定在100%左右。
In this work,chemical vapor deposition(CVD)and pyrolytic carbon(PC)was deposited on CNT films and their connections to limit slippage between CNTs.Scanning electron microscopy(SEM)observations revealed that the deposition of pyrolytic carbon(PC)made the CNT surface flatter and the holes on the surface more uniform.According to the stress-strain and hydrophilic-hydrophobic tests,the tensile strength of the CNT/PC composite film was increased by 200%,and the static contact angle between water and the film was reduced from 123°to 78°.Subsequently,a CNT/PC/MnO2 thin-film electrode material was prepared by an electrochemical deposition method.According to electrochemical tests,it was found that the specific capacitance of a single electrode was 326 mF/cm^2 at a current of 1 mA/cm^2,which could stably cycle 10,000 and the retention rate of the capacitor is stable at about 100%.
作者
巩倩
周雨融
许昊
邸江涛
门传玲
GONG Qian;ZHOU Yu-rong;XU Hao;DI Jiang-tao;MEN Chuan-ling(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Division of Advanced Nanomaterials and Key Lab of Nano-Devices and Applications,Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences,Suzhou 215123,China)
出处
《广州化学》
CAS
2020年第2期1-6,15,共7页
Guangzhou Chemistry
基金
国家自然科学基金(21773293和21603264)。
关键词
碳纳米管
热解碳包覆
超级电容器
carbon nanotube
pyrolytic carbon coating
supercapacitor
