材料科学
超级电容器
纳米线
电极
电化学
介孔材料
电容
储能
电流密度
功率密度
纳米技术
热液循环
阳极
化学工程
催化作用
功率(物理)
量子力学
生物化学
物理
工程类
物理化学
化学
作者
Daoping Cai,Dandan Wang,Bin Liu,Lingling Wang,Yuan Liu,Han Li,Yanrong Wang,Qiuhong Li,Taihong Wang
摘要
In this work, we report a facile two-step hydrothermal method to synthesize the unique three-dimensional Co3O4@NiMoO4 core/shell nanowire arrays (NWAs) on Ni foam for the first time. The Co3O4 nanowires are fully covered by ultrathin mesoporous NiMoO4 nanosheets. When evaluated as a binder-free electrode for supercapacitors in a 2 M KOH aqueous solution, the Co3O4@NiMoO4 hybrid electrode exhibits a greatly enhanced areal capacitance of 5.69 F cm(-2) at a high current density of 30 mA cm(-2), nearly 5 times that of the pristine Co3O4 electrode (1.10 F cm(-2)). The energy density of the hybrid electrode is 56.9 W h kg(-1) at a high power density of 5000 W kg(-1). In addition, the Co3O4@NiMoO4 hybrid electrode also exhibits good rate capability and cycling stability, which would hold great promise for electrochemical energy storage.
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