超级电容器
材料科学
碳纳米管
电极
纳米技术
化学工程
功率密度
气凝胶
碳纤维
电化学
复合材料
化学
复合数
工程类
物理化学
功率(物理)
物理
量子力学
作者
Jiangshan Gao,Shaolong Li,Huanhuan Wang,Yang Zhou,Liangyu Zhang,Zhiming Liu,Yan He
标识
DOI:10.1016/j.jallcom.2020.157963
摘要
Herein, the method of free arc thermal excitation is developed to disperse CNTs agglomerations to fluffy CNTs aerogels on Ni [email protected]2O4 nanoneedles ([email protected]2O4/CNTs). [email protected]2O4/CNTs is evaluated as an electrode for supercapacitor and shows remarkable electrochemical properties, which is resulted from the synergistic effect of high conductive CNTs aerogels and sufficient active sites of NiCo2O4 nanoneedles. The mass specific capacity and rate capability of [email protected]2O4/CNTs are 20% and 14% higher than that of [email protected]2O4 due to the high conductivity of CNTs aerogels. The assembled [email protected]2O4/CNTs//activated carbon (AC) device exhibites an exellent energy density of 43.2 Wh kg−1 when the power density is 801 W kg−1. The asymmetric device also has a high cycling stability that the energy density can remain 85% after 5000 cycles. More importantly, the new strategy offers an ingratiating strategy to disperse CNTs losslessly, meanwhile provides a new view into the combination of CNTs and various active materials for supercapacitor electrodes.
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