期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 31, 期 2, 页码 1355-1366出版社
SPRINGER
DOI: 10.1007/s10854-019-02649-3
关键词
-
类别
资金
- National Natural Science Foundation of China [21301007, 21301006]
- Anhui Normal University Nurturing Project [2016XJJ001]
Hierarchical MnO2@NiCo2O4 core-shell nanostructures are well fabricated via a simple two-step hydrothermal process. The MnO2@NiCo2O4 core-shell nanostructures materials electrode presents a high capacitance of 684 F g(-1) at 2 A g(-1) current density, 40 times higher than that of the single MnO2 nanowires electrode. And 87.4% retain is approached even at a high current density of 15 A g(-1), showing satisfactory rate capability. Furthermore, the theoretical analysis reveals the surface capacitance contribution is predominant in the capacitive contribution. The asymmetric supercapacitor assembled with MnO2@NiCo2O4 exhibited a maximum energy density of 35.6 Wh kg(-1) and a maximum power density of 745.1 W kg(-1). After 7000 charge-discharge cycling at a current density of 4 A g(-1), it still can maintain 90% of the initial capacitance. These results suggest that MnO2@NiCo2O4 is the promising candidate of supercapacitors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据