NDLI: Hierarchical 3D NiFe2O4@MnO2 core-shell nanosheet arrays on Ni foam for high-performance asymmetric supercapacitors.

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Hierarchical 3D NiFe2O4@MnO2 core-shell nanosheet arrays on Ni foam for high-performance asymmetric supercapacitors.

Content Provider	Semantic Scholar
Author	Zhang, Xinyang Zhang, Ziqing Sun, Shuanggan Sun, Qiushi Liu, Xiaoyang
Copyright Year	2018
Abstract	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.
Starting Page	2266
Ending Page	2273
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1039/c7dt04127f
Alternate Webpage(s)	http://www.rsc.org/suppdata/c7/dt/c7dt04127f/c7dt04127f1.pdf
PubMed reference number	29363699
Alternate Webpage(s)	https://doi.org/10.1039/c7dt04127f
Journal	Medline
Volume Number	47
Issue Number	7
Journal	Dalton transactions
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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