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- Title
ZIF-67 Derived Co 2 VO 4 Hollow Nanocubes for High Performance Asymmetric Supercapacitors.
- Authors
Li, Chengda; Ma, Dongliang; Zhu, Qinglin
- Abstract
In this work, a new type of Co2VO4 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−1 at 1.0 A g−1. 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−1 at a high-power density of 801.24 W kg−1, with 78% capacitance retention after 10,000 cycles at 10 A g−1.
- Subjects
CARBON dioxide; SUPERCAPACITORS; ELECTRON diffusion; ENERGY density; SUPERCAPACITOR electrodes; ION exchange (Chemistry)
- Publication
Nanomaterials (2079-4991), 2022, Vol 12, Issue 5, pN.PAG
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano12050848