Zeolitic imidazolate framework derived ZnCo 2 O 4 hollow tubular nanofibers for long-life supercapacitors

Uniform one-dimensional metal oxide hollow tubular nanofibers (HTNs) have been controllably prepared using a calcination strategy using electrospun polymer nanofibers as soft templates and zeolitic imidazolate framework nanoparticles as precursors. Utilizing the general synthesis method, the ZnO HTN...

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Bibliographic Details
Published inRSC advances Vol. 10; no. 23; pp. 13922 - 13928
Main Authors Zhao, Shihang, Yu, Xianbo, Chen, Hongmei, Tao, Kai, Hu, Yaoping, Han, Lei
Format Journal Article
LanguageEnglish
Published England 06.04.2020
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Summary:Uniform one-dimensional metal oxide hollow tubular nanofibers (HTNs) have been controllably prepared using a calcination strategy using electrospun polymer nanofibers as soft templates and zeolitic imidazolate framework nanoparticles as precursors. Utilizing the general synthesis method, the ZnO HTNs, Co O HTNs and ZnCo O HTNs have been successfully prepared. The optimal ZnCo O HTNs, as a representative substance applied in supercapacitors as the positive electrode, delivers a high specific capacity of 181 C g at a current density of 0.5 A g , an excellent rate performance of 75.14% and a superior capacity retention of 97.42% after 10 000 cycles. Furthermore, an asymmetric supercapacitor assembled from ZnCo O HTNs and active carbon also shows a stable and ultrahigh cycling stability with 95.38% of its original capacity after 20 000 cycle tests.
ISSN:2046-2069
2046-2069
DOI:10.1039/D0RA01844A