期刊
DALTON TRANSACTIONS
卷 47, 期 7, 页码 2266-2273出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7dt04127f
关键词
-
资金
- National Natural Science Foundation of China [21271082, 21371068]
Hierarchical NiFe2O4@MnO2 core-shell nanosheet arrays (NSAs) were synthesized on Ni foam as an integrated electrode for supercapacitors, using a facile two-step hydrothermal method followed by calcination treatment. The NiFe2O4 nanosheets were designed as the core and ultrathin MnO2 nanoflakes as the shell, creating a unique three-dimensional (3D) hierarchical electrode on Ni foam. The composite electrode exhibited remarkable electrochemical performance with a high specific capacitance of 1391 F g(-1) at a current density of 2 mA cm(-2) and long cycling stability at a high current density of 10 mA cm(-2) (only 11.4% loss after 3000 cycles). Additionally, an asymmetric supercapacitor (ASC) device was fabricated with a NiFe2O4@MnO2 composite as the positive electrode material and activated carbon (AC) as the negative one. The ASC device exhibited a high energy density (45.2 W h kg(-1)) at a power density of 174 W kg(-1), and an excellent cycling stability over 3000 cycles with 92.5% capacitance retention. The remarkable electrochemical performance demonstrated its great potential as a promising candidate for high-performance 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