Nanoengineering of ZnCo2O4@CoMoO4 heterogeneous structures for supercapacitor and water splitting applications

A hybrid ZnCo2O4@CoMoO4 heterogeneous structure deposited onto nickel foam was synthesized via a two-step hydrothermal process. The results demonstrate that the hybrid architecture exhibits excellent electrochemical performance, including the specific capacitance of 1040C g−1 at 1 A g−1 for hybrid s...

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Bibliographic Details
Published in:Ceramics international 2023-02, Vol.49 (3), p.4422-4434
Main Authors: Yang, Wen-Duo, Xiang, Jun, Zhao, Rong-Da, Loy, Sroeurb, Li, Mei-Ting, Ma, Dong-Mei, Li, Jia, Wu, Fu-Fa
Format: Article
Language:English
Subjects:
Cycle retention
Electrocatalyst
Heterogeneous structure
Hydrothermal
Supercapacitor
ZnCo2O4@CoMoO4
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Summary:A hybrid ZnCo2O4@CoMoO4 heterogeneous structure deposited onto nickel foam was synthesized via a two-step hydrothermal process. The results demonstrate that the hybrid architecture exhibits excellent electrochemical performance, including the specific capacitance of 1040C g−1 at 1 A g−1 for hybrid structures, high energy density of 87.3 Wh kg−1 at a power density of 2700 W kg−1 for an as-assembled supercapacitor and excellent cycle stability with a capacity retention of 99% undergoing 8000 charge-discharge for the device. Moreover, it also shows favorable electrocatalytic activity with low overpotentials of 237 mV at 20 mA cm−2 for oxygen evolution reaction and 114 mV at 10 mA cm−2 for hydrogen evolution reaction, and low cell voltage of 1.54 V at 10 mA cm−2 for overall water splitting. In addition, the stability maintains well for the long-term use of 13 h. We believe that this hybrid ZnCo2O4@CoMoO4 heterogeneous structure could be a promising candidate for future energy storage and conversion.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2022.09.329