ZIF-8@MWCNT-derived carbon composite as electrode of high performance for supercapacitor

Yanfang Wang, Bingwei Chen, Yi Zhang, Lijun Fu, Yusong Zhu, Lixin Zhang, Yuping Wu

Research output: Contribution to journalArticlepeer-review

146 Scopus citations

Abstract

Carbon materials from zeolitic imidazolate framework (ZIF) present poor electrochemical performance as electrode materials for supercapacitors. In this work, well-intergrown ZIF nanocystals are strung on MWCNTs to form necklace architecture. After carbonization and chemical etching, porous carbons with necklace architecture and proper hierarchical micro-mesoporous structure were obtained. It exhibits excellent electrochemical performance as electrode material for supercapacitor in 1 M H2SO4 solution such as high specific capacitance up to 326 F·g−1 at 1 A·g−1, good rate capability and excellent cycling stability of 99.7% capacitance retention after 10000 cycles. The main reasons are due to the increased surface area, the improved electrical conductivity, and the combination of micro- and meso-porous structure. This provides another promising way to design porous carbons from ZIF materials for supercapacitors.

Original languageEnglish
Pages (from-to)260-269
Number of pages10
JournalElectrochimica Acta
Volume213
DOIs
StatePublished - 20 Sep 2016

Keywords

  • ZIF-8
  • porous carbon
  • supercapacitor
  • zeolitic imidazolate framework

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