MnO2/multiwall carbon nanotube/Ni-foam hybrid electrode for electrochemical capacitor

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Chen, L.H.^1 ; Li, L.^1 ; Qian, W.J.^1 ; Dong, C.K.^1

Institute of Micro-nano Structures and Optoelectronics, Wenzhou University, Wenzhou, Zhejiang

325035, China^1

关键词: Capacitive response;    Electrochemical capacitor;    High current densities;    Hybrid electrodes;    Hydrothermal methods;    Manganese dioxide;    Ternary composites;    Three electrode;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012018/pdf
DOI  :  10.1088/1757-899X/292/1/012018

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The ternary composites of manganese dioxide/multiwall carbon nanotube/Ni-foam (MnO2/MWNT/Ni-foam) for supercapacitors were fabricated via a hydrothermal method after direct growth of MWNTs on the Ni-foam. The structural properties of the electrodes were characterized by SEM and TEM. The electrode exhibited excellent electrochemical properties from the investigation based on the three-electrode setup. Low contact resistance Rsof about 0.291 Ω between MnO2/MWNT and Ni-foam was reached benefited from the direct growth structure. High capacitance of 355.1 F/g at the current density of 2 A/g was achieved, with good capacitive response at high current density. The MnO2/MWNT/Ni-foam electrode exhibits good stability performance after 2000 cycles at a current of 40 mA.