Mesoporous aluminium manganese cobalt oxide with pentahedron structures for energy storage devices

Ternary metal oxides with unique mesoporous structures grown on nickel foam are considered as attractive candidates for high-performance supercapacitors because of their fast electron-transport access, rich accessibility of electroactive sites to the electrolyte, shortened ion diffusion path and won...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (31), p.18417-18427
Main Authors: Wu, Chun, Zhu, Ying, Guan, Cao, Jia, Chuankun, Qin, Wei, Wang, Xianyou, Zhang, Kaili
Format: Article
Language:English
Subjects:
Activated carbon
Aluminum
Cobalt
Cobalt oxides
Electrodes
Electron transport
Electronic devices
Energy storage
Flux density
Ion diffusion
Manganese
Metal foams
Nickel
Oxides
Specific capacity
Supercapacitors
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Summary:Ternary metal oxides with unique mesoporous structures grown on nickel foam are considered as attractive candidates for high-performance supercapacitors because of their fast electron-transport access, rich accessibility of electroactive sites to the electrolyte, shortened ion diffusion path and wonderful synergetic effects of different metallic elements. Herein, a novel three-dimensional porous pentahedron structured aluminium manganese cobalt oxide (AMCO) synthesized via a facile and cost-effective hydrothermal method followed by a short post-annealing process has been reported. A high specific capacity of 923.1 C g 1 at 1 A g 1 as well as good cycling stability and 100% coulombic efficiency after 8000 cycles can be achieved when used as a supercapacitor electrode. In addition, the as-fabricated asymmetric supercapacitor based on the as-prepared AMCO positive electrode and an activated carbon negative electrode exhibits a high energy density of 88.2 W h kg 1 at a power density of 799 W kg 1 , indicating its great promise for constructing high-performance energy storage devices. A porous pentahedron structured AlMnCo ternary oxide (AMCO) grown on nickel foam with high asymmetric supercapacitive performance has been achieved.
ISSN:2050-7488
2050-7496
DOI:10.1039/c9ta06319f