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Homogeneous nickel metal-organic framework microspheres on reduced graphene oxide as novel electrode material for supercapacitors with outstanding performance
journal contribution
posted on 2020-03-01, 00:00 authored by Yuxue Zhong, Xueying Cao, Liu Ying, Liang Cui, Colin BarrowColin Barrow, Wenrong YangWenrong Yang, Jingquan LiuHerein, we designed and prepared nickel metal-organic framework microspheres anchored directly on reduced graphene oxide (Ni-MOF/rGO) by a facile hydrothermal and successive calcining process. The electrode for Ni-MOF/rGO composite annealed at an optimized temperature of 300 °C (Ni-MOF/rGO-300) shows desired conductivity, good cycling stability and high ion-accessible surface area, leading to an ultrahigh specific capacitance of 954 F g−1 at a current density of 1 A g−1 and a remarkable rate capability of 80.25% at 5 A g−1. Meanwhile, the assembled Ni-MOF/rGO-300//activated carbon asymmetric supercapacitor (ASC) shows a favorable energy density up to 17.13 Wh kg−1 at a power density of 750 W kg−1 in the potential window of 0–1.5 V. Moreover, the capacitance retention can still maintain 81.63% after 4000 cycles at a high current density of 5 A g−1. The excellent electrochemical properties can be credited to the synergistic effects between the unique structures of Ni-MOF and rGO, which makes the Ni-MOF/rGO composite a potential electrode material for high performance supercapacitors.
History
Journal
Journal of colloid and interface scienceVolume
561Pagination
265 - 274Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0021-9797Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2019, ElsevierUsage metrics
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