Journal
RSC ADVANCES
Volume 11, Issue 25, Pages 15258-15263Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra10377b
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Funding
- Henan Science and Technology [162300410003]
- Anyang Science and Technology, Cultivation project of Anyang Normal University [AYNUKP-2018-B17]
- Opening Research Foundations of Department of Chemistry Qingdao University of Science and Technology [QUSTHX201924]
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Hierarchical Ni-Co-Mn hydroxide hollow architectures were successfully achieved via an etching process, displaying promising performance in supercapacitors and showing broad application prospects.
In this study, hierarchical Ni-Co-Mn hydroxide hollow architectures were successfully achieved via an etching process. We first performed the synthesis of NiCoMn-glycerate solid spheres via a solvothermal route, and then NiCoMn-glycerate as the template was etched to convert into hierarchical Ni-Co-Mn hydroxide hollow architectures in the mixed solvents of water and 1-methyl-2-pyrrolidone. Hollow architectures and high surface area enabled Ni-Co-Mn hydroxide to manifest a specific capacitance of 1626 F g(-1) at 3.0 A g(-1), and it remained as large as 1380 F g(-1) even at 3.0 A g(-1). The Ni-Co-Mn hydroxide electrodes also displayed notable cycle performance with a decline of 1.6% over 5000 cycles at 12 A g(-1). Moreover, an asymmetric supercapacitor assembled with this electrode exhibited an energy density of 44.4 W h kg(-1) at 1650 W kg(-1) and 28.5 W h kg(-1) at 12 374 W kg(-1). These attractive results demonstrate that hierarchical Ni-Co-Mn hydroxide hollow architectures have broad application prospects in supercapacitors.
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