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

作　　者：Nuoya Wang Xinhua Huang Lei Zhang Jinsong Hu Yimin Chao Ruikun Zhao 

机构地区：[1]School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China [2]School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,China [3]School of Chemistry,University of East Anglia,Norwich,NR47TJ,UK [4]College of Arts and Sciences,Khalifa University of Science and Technology,Abu Dhabi,UAE

出　　处：《Frontiers of Chemical Science and Engineering》2021年第4期944-953,共10页化学科学与工程前沿（英文版）

基　　金：This work was supported by the Key Project of Natural Science Research in Anhui Colleges and Universities(KJ2017A070);Anhui Province Natural Science Foundation Project(1908085ME157);Anhui Province Selective Foundation of Innovation Project for Study Abroad(2019LCX020).

摘　　要：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 HC1,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 10000 cycles.There is a systematic correlation between micro-/meso-porosity of ZIF-8@C/N-x and their electrochemical performances.

关 键 词：CORE-SHELL EDLC electrode microporos nano polygons nitrogen doped carbon 

分 类 号：O61[理学—无机化学]