超级电容器
电极
结晶度
电解质
化学
铜
钼酸盐
化学工程
电容
热液循环
纳米技术
材料科学
无机化学
有机化学
物理化学
工程类
结晶学
作者
Sung Min,S. Chandra Sekhar,Bhimanaboina Ramulu,Yun Suk Huh
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2018-06-27
卷期号:57 (14): 8440-8450
被引量:29
标识
DOI:10.1021/acs.inorgchem.8b01119
摘要
Herein, we develop a binder-free copper molybdate nanocone array with a prism-like morphology on nickel foam (Cu3Mo2O9 NCAs/Ni foam) using a single-step hydrothermal method. With an optimal growth time (10 h) under hydrothermal conditions, the prism-like Cu3Mo2O9 NCAs are uniformly decorated on Ni foam with good adhesion and crystallinity. The prepared Cu3Mo2O9 NCAs/Ni foam has been directly used as a binder-free electrode to examine its suitability as a positive electrode in hybrid supercapacitors. In an aqueous 1 M KOH electrolyte, the binder-free Cu3Mo2O9 NCAs/Ni foam showed battery-type behavior with a high areal capacity of 449.5 μAh cm–2 at a discharge current density of 2 mA cm–2 and also exhibited a good cycling stability. In addition, the pouch-type hybrid supercapacitor is assembled using the prism-like Cu3Mo2O9 NCAs/Ni foam as a positive electrode and the activated carbon as a negative electrode in a 1 M KOH electrolyte. The hybrid supercapacitor achieves a maximum cell potential of 1.6 V with superior energy storage properties, including a high areal capacitance of 609.7 mF cm–2 at 3.5 mA cm–2, a high areal energy (0.21 mWh cm–2), and a high power density (2.73 mW cm–2). The obtained results suggest that the facilely synthesized Cu3Mo2O9 NCAs/Ni foam electrode has great potential in high-performance energy storage devices.
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