ZIF-67 Derived Co 2 VO 4 Hollow Nanocubes for High Performance Asymmetric Supercapacitors

In this work, a new type of Co VO hollow nanocube (CoVO-HNC) was synthesized through an ion exchange process using ZIF-67 nanocubes as a template. The hollow nanocubic structure of the CoVO-HNC provides an abundance of redox sites and shortens the ion/electron diffusion path. As the electrode materi...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2022-03, Vol.12 (5)
Main Authors: Li, Chengda, Ma, Dongliang, Zhu, Qinglin
Format: Article
Language:English
Online Access:Get full text
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Summary:In this work, a new type of Co VO hollow nanocube (CoVO-HNC) was synthesized through an ion exchange process using ZIF-67 nanocubes as a template. The hollow nanocubic structure of the CoVO-HNC provides an abundance of redox sites and shortens the ion/electron diffusion path. As the electrode material of supercapacitors, the specific capacitance of CoVO-HNC is 427.64 F g at 1.0 A g . Furthermore, an asymmetric supercapacitor (ASC) was assembled using CoVO-HNC and activated carbon (AC) as electrodes. The ASC device attains an energy density of 25.28 Wh kg at a high-power density of 801.24 W kg , with 78% capacitance retention after 10,000 cycles at 10 A g .
ISSN:2079-4991
2079-4991