Recently, the rational structure design has been demonstrated as an effective path to circumvent the above-mentioned drawbacks. Especially, 3D carbon network (3DCN) has been employed as a conventional substrate to fabricate the composites because of its high electrical conductivity, controllable pore-size distribution and interconnected porous network.
Herein, we report a facile nanoconfined strategy to prepare the MOF-3DCN composite with Ball-in-Cage nanostructure. The unique “Cage” frame not only controls the ZIF-67 particle size, but also ensures a high electron conductivity of the entire structure, which displays high electrochemical performance in supercapacitor. It can be transformed into metal oxide or sulfide/carbon composites through thermal treatment methods. The MOF-derived materials show great storage performances for lithium-ion batteries as well. Furthermore, another 3D carbon network was served as the matrix for the ZIF-8 nanoparticles fabrication. A spider-web-like carbon pattern formed on 3DCN surface enhances the mass-transfer ability and takes the advantages of ZIF-derived carbon, which shows great potential in the electrolyte-based energy storage applications.
References
- Song, D.;Qi-Long, Z.; Qiang, X.: Nanomaterials derived from metal–organic frameworks. Nature Reviews Materials 3, 17075 (2017).
- Wu, H. B.;Lou, X. W. D.: Metal-organic frameworks and their derived materials for electrochemical energy storage and conversion: Promises and challenges. Science Advances 3, 9252 (2017).
- Ke, C.;Zhenhua, S.; Ruopian, F.; Ying, S.; Hui-Ming, C.; Feng, L.: Metal-Organic Frameworks (MOFs)-Derived Nitrogen-Doped Porous Carbon Anchored on Graphene with Multifunctional Effects for Lithium-Sulfur Batteries. Advanced Functional Materials. 1707592 (2018).