Growth of CuCo2O4@MnMoO4 core/shell nanosheet arrays for high energy density asymmetric supercapacitors

被引：73

作者：

Chen, Sanming ^{[1
]}

Cui, Shiqiang ^{[2
]}

Chandrasekaran, Sundaram ^{[2
]}

Ke, Chong ^{[1
]}

Li, Zhongfa ^{[1
]}

Chen, Peihang ^{[1
]}

Zhang, Chenhua ^{[1
]}

Jiang, Yongdong ^{[1
]}

机构：

[1] Tsinghua Innovat Ctr Dongguan, Ctr Adv Funct Nanomat, Dongguan 523808, Peoples R China

[2] Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2020年 / 341卷

关键词：

Energy storage; Hybrid supercapacitor; CuCo2O4; MnMoO4; Electrode material; HIGH-PERFORMANCE; ADVANCED ELECTRODES; NANOWIRE ARRAYS; NI FOAM; CUCO2O4; NANOSHEETS; OXIDE NANOSHEETS; NANOTUBE ARRAYS; COMPOSITES; EFFICIENT; BATTERY;

D O I：

10.1016/j.electacta.2020.135893

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Three-dimensional CuCo2O4@MnMoO4 core/shell nanosheet arrays grown on nickel foam were designed and prepared through two-step hydrothermal processes followed by a low-temperature thermal treatment. The interconnected CuCo2O4 nanosheets are uniformly decorated by ultrathin MnMoO4 nanoflakes, forming highly porous hierarchical networks. The electrochemical results reveal that the binderfree CuCo2O4@MnMoO4 electrode exhibits a superb specific capacitance of 1327.5 F g(-1) at 1 A g(-1) and remarkable cycling stability (maintaining 92.8% of initial capacitance over 6000 cycles). The superior supercapacitive properties can be ascribed to the high mechanical stability, large surface area, high electron/ion transfer rate, and the strong synergistic contribution from CuCo2O4 and MnMoO4. Additionally, the assembled CuCo2O4@MnMoO4//graphene hybrid supercapacitor device delivers a maximum specific energy of 58.9 Wh kg(-1) at a specific power of 670 W kg(-1), manifesting the great potential of the CuCo2O4@MnMoO4 core/shell nanosheet arrays as advanced electrode materials for energy storage systems. (C) 2020 Published by Elsevier Ltd.

引用

页数：8

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