3 years ago

Spontaneous Weaving of Graphitic Carbon Networks Synthesized by Pyrolysis of ZIF-67 Crystals

Spontaneous Weaving of Graphitic Carbon Networks Synthesized by Pyrolysis of ZIF-67 Crystals
Xuebin Wang, Jian Liu, Wei Zhang, Ming Hu, Ji-Sen Jiang, Yinxiang Chen, Xiangfen Jiang, Yusuf Valentino Kaneti, Yusuke Yamauchi
Three-dimensional (3D) networks of graphitic carbon are promising materials for energy storage and conversion devices because of their high electrical conductivity, which is promoted by the good interconnection between the carbon particles. However, it is still difficult to directly synthesize such carbon networks. Herein, we report the novel synthesis of 3D graphitic carbon networks through the pyrolysis of nanosized ZIF-67 crystals. Interestingly, the unusual effect of downsizing the ZIF-67 crystals and the incorporation of catalytic Co nanoparticles was the spontaneous formation of graphitic networks. The obtained graphitic carbon networks show excellent electrochemical performance for the insertion and extraction of potassium ions. Networking skills: A facile method has been developed to synthesize continuous 3D carbon networks by pyrolysis of nanosized metal-organic frameworks (MOFs). The synthesized continuous 3D carbon networks show excellent electrochemical performance for potassium-ion batteries, with long cycling stability and good capacity retention at high rates.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201701252

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