Nanoengineering of ZnCo2O4@CoMoO4 heterogeneous structures for supercapacitor and water splitting applications. Issue 3 (1st February 2023)

• Record Type: Journal Article
• Authors: Yang, Wen-Duo; Xiang, Jun; Zhao, Rong-Da; Loy, Sroeurb; Li, Mei-Ting; Ma, Dong-Mei; Li, Jia; Wu, Fu-Fa
• Is Part Of: Ceramics international. Volume 49:Issue 3(2023)
• Page Start: 4422
• Page End: 4434
• Publication Date: 2023-02-01
• Subjects: ZnCo2O4@CoMoO4 -- Heterogeneous structure -- Hydrothermal -- Supercapacitor -- Electrocatalyst -- Cycle retention; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.09.329
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A hybrid ZnCo2 O4 @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 ZnCo2 O4 @CoMoO4 heterogeneous structure could be a promising candidate for future energy storage and conversion.