Facile synthesis of Co3O4@MnO2 core-shell nanocomposites for high-performance supercapacitor

被引：24
作者：
Lv Jinlong [1 ]
Yang Meng [1 ]
Liang Tongxiang [2 ]
Miura, Hideo [1 ]
机构：
[1] Tohoku Univ, Fracture & Reliabil Res Inst, Sch Engn, Sendai, Miyagi 9808579, Japan
[2] Jiangxi Univ Sci & Technol, Sch Mat Sci & Engn, Ganzhou, Peoples R China
来源：
MATERIALS LETTERS | 2017年 / 197卷
关键词：
Co3O4; nanowires; MnO2; nanosheets; Hydrothermal; Supercapacitors; Microstructures; NI FOAM; ELECTROCHEMICAL PERFORMANCE; ASYMMETRIC SUPERCAPACITORS; CO3O4; NANOSHEETS; ARRAYS; ELECTRODES; CAPACITANCE; MORPHOLOGY;
D O I：
10.1016/j.matlet.2017.03.127
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Co3O4@MnO2 core-shell arrays hybrid electrode directly grown on Ni foam for supercapacitor was obtained by two-step hydrothermal processes. Co3O4@MnO2 core-shell arrays hybrid electrode exhibited a high specific capacitance of 1920 F g(-1) at current density of 1 A g(-1). This was attributed to relative high conductivity of the Co3O4 nanowire arrays and the large surface area provided by the ultrathin MnO2 nanosheets. The porous MnO2 nanosheets stack provided numerous channels for rapid diffusion of electrolyte ions and fast electron transport, which enhanced the electrochemical reactions. The synergetic effect between Co3O4 nanowire and MnO2 nanosheets also improved the supercapacitor performance. In addition, the Co3O4@MnO2 core-shell arrangement also exhibited excellent cyclic stability. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：127 / 130
页数：4
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