Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 28, Issue 13, Pages 9221-9227Publisher
SPRINGER
DOI: 10.1007/s10854-017-6656-5
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Funding
- National Natural Science Foundation of China [21301159]
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Hollow Ni-Co layered double hydroxide (LDH) was synthesized with rhombic dodecahedral zeolitic imidazolate framework-67 (ZIF-67) as self-sacrificed template and cobalt precursor. Water was found to be very important role on the formation of Ni-Co LDH hollow microstructure. As a supercapacitor electrode material, the obtained hollow Ni-Co LDH delivered a high specific capacitance of 1530 F g(-1) at the current density of 1.0 A g(-1) and good cycle performance, which can be ascribed to its hollow mesoporous structure composed of the Ni-Co LDH nanosheets and high specific surface area. Combined with the AC negative electrodes, the assembled asymmetric supercapacitors performed an energy density of 27.5 Wh kg(-1) at the power density of 375 W kg(-1).
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