Journal
NANOSCALE
Volume 9, Issue 19, Pages 6478-6485Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr01548h
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Funding
- National Natural Science Foundation of China [51472177, 51272173, 51422104, 51372169, 51572189]
- China-EU Science and Technology Cooperation Project [SQ2013ZOA100006]
- Tianjin Science and Technology Major Project [16ZXCLGX00110]
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In order to improve the electrical conductivity of metal-organic frameworks (MOFs) which have drawn remarkable attention owing to their potential application in the energy storage field, a Co-based zeolitic imidazolate framework (ZIF-67) polyhedron was in situ integrated into a three-dimensional carbon network (3DCN) to construct a Ball-in-Cage (BIC) nanostructure. The introduced 3DCN acting as the electronic pathway can provide nucleation sites for MOF particles; consequently, further growth of the MOF particles is limited by the size effect of 3DCN. The BIC frame not only controls the MOF particle size, but also ensures a high electron conductivity of the entire structure. The as-prepared BIC electrode displays an outstanding capacitance of 119 F g(-1) at a current density of 0.5 A g(-1) and a great rate performance as well, which can be expected to be a promising approach to enhance the electrochemical performance of pristine MOFs in the future.
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