Details

Autor(en) / Beteiligte

• Zhang, Yong
• Chang, Cui-rong
• Gao, Hai-li
• Wang, Shi-wen
• Yan, Ji
• Gao, Ke-zheng
• Jia, Xiao-dong
• Luo, He-wei
• Fang, Hua
• Zhang, Ai-qin
• Wang, Li-zhen

Titel

High-performance supercapacitor electrodes based on NiMoO4 nanorods

Ist Teil von

• Journal of materials research, 2019-07, Vol.34 (14), p.2435-2444

Ort / Verlag

New York, USA: Cambridge University Press

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Novel NiMoO4-integrated electrode materials were successfully prepared by solvothermal method using Na2MoO4·2H2O and NiSO4·6H2O as main raw materials, water, and ethanol as solvents. The morphology, phase, and structure of the as-prepared materials were characterized by SEM, XRD, Raman, and FT-IR. The electrochemical properties of the materials in supercapacitors were investigated by cyclic voltammetry, constant current charge–discharge, and electrochemical impedance spectroscopy techniques. The effects of volume ratio of water to ethanol (W/E) in solvent on the properties of the product were studied. The results show that the pure phase monoclinic crystal NiMoO4 product can be obtained when the W/E is 2:1. The diameter and length are 0.1–0.3 µm and approximately 3 µm, respectively. As an active material for supercapacitor, the NiMoO4 nanorods material delivered a discharge specific capacitance of 672, 498, and 396 F/g at a current density of 4, 7, and 10 A/g, respectively. The discharge specific capacitance slightly decreased from 815 to 588 F/g with a retention of 72% after 1000 cycles at a current density of 1 A/g. With these superior capacitance properties, the novel NiMoO4 integrated electrode materials could be considered as promising material for supercapacitors.