Journal
ADVANCED MATERIALS INTERFACES
Volume 5, Issue 14, Pages -Publisher
WILEY
DOI: 10.1002/admi.201800438
Keywords
carbon nanotubes; composite; nickel-cobalt hydroxides; supercapacitors
Funding
- Key Project of Chinese National Programs for Research and Development [2016YFC0203800]
- National Natural Science Foundation of China [21706132, 51408309, 51578288]
- Natural Science Foundation of Jiangsu Province [BK20160834]
- Industry Academia Cooperation Innovation Fund Projects of Jiangsu Province [BY2016004-09]
- Jiangsu Province Scientific and Technological Achievements into a Special Fund Project [BA2015062, BA2016055, BA2017095]
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Metal-organic frameworks materials have shown great potential in energy storage and conversion research, but their poor electrical conductivity and inferior chemical stability limit their applications. Herein, an in situ-grown crosslinked nickel-cobalt hydroxides@carbon nanotubes composite with a nanosheet-covered hollow structure is rationally designed and synthesized successfully from ZIF-67@carbon nanotubes. Different from other studies, the carbon nanotubes in this composite penetrate the hollow structure, and the active nanosheets also grow on the parts protruding from the hollow boxes via this in situ synthetic route. Compare with pure nickel-cobalt hydroxides, the composite exhibits enhanced electroactivity in terms of the specific capacity and cycling performance. In particular, it delivers a high specific capacity of 916.8 C g(-1) at 1 A g(-1) and approximate to 79.0% of its initial value preserves after 4000 cycles. This facile synthetic approach enables the preparation of crosslinked metal-organic framework materials with the potential to meet the demands of energy storage and conversion devices as well as supercapacitors.
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