Pyrolysis transformation of ZIF-8 wrapped with polytriazine to nitrogen enriched core-shell polyhedrons carbon for supercapacitor

Wang, Nuoya, Huang, Xinhua, Zhang, Lei, Hu, Jinsong, Chao, Yimin and Zhao, Ruikun (2021) Pyrolysis transformation of ZIF-8 wrapped with polytriazine to nitrogen enriched core-shell polyhedrons carbon for supercapacitor. Frontiers of Chemical Science and Engineering, 15 (4). 944–953. ISSN 2095-0179

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Abstract

This work presents a simple effective strategy to synthesize N-doped and shell-controlled carbon nanocages through a package baking approach. A green approach to synthesize core-shell ZIF-8@PTZ nanoparticles involves zinc contained ZIF-8 core wrapped by a N-enriched polytriazine (PTZ). Synthesized core-shell ZIF-8@PTZ nanoparticles are calcinated to further sublime zinc through PTZ shell and washed by HCl, leaving a porous carbon structure. At the meantime, hollow cavities were introduced into N-doped carbon polyhedrons via the sacrifice of ZIF-8 template (noted as ZIF-8@C/N-x). The electrochemical performance of the ZIF-8@C/N-x as supercapacitor electrode has demonstrated high energy density and specific capacitance, as well as a long-term cycleability showing 92% capacitance retention after 10,000 cycles. There is a systematic correlation between micro-/meso-porosity of ZIF-8@C/N-x and their electrochemical performances.

Item Type: Article
Uncontrolled Keywords: edlc electrode,core-shell,microporos nano polygons,nitrogen doped carbon,chemical engineering(all) ,/dk/atira/pure/subjectarea/asjc/1500
Faculty \ School: Faculty of Science > School of Chemistry
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Depositing User: LivePure Connector
Date Deposited: 25 Aug 2020 00:06
Last Modified: 30 Sep 2021 15:27
URI: https://ueaeprints.uea.ac.uk/id/eprint/76566
DOI: 10.1007/s11705-020-2005-y

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