Development and evaluation of Zn2+ ions hybrid supercapacitor based on ZnxMnO2-CNTs cathode

Danhong Ren, Xuan Li, Xinhao Zhao, Baocheng Liu, Zhengchun Yang, Jie He, Tong Li and Peng Pan

Applied Energy, 2022, vol. 324, issue C, No S0306261922010200

Abstract: A hybrid supercapacitor exhibits excellent electrochemical properties due to its simultaneously high power and energy densities. However, the capacity under long hours will be greatly reduced. Therefore, this study develops a new type of Zn2+ ions hybrid supercapacitors (Zn-HSCs). The cathode of this device requires not only an ultra-high stability tunnel structure, but also high electrical conductivity. Thus, on the basis of the study of ZnxMnO2, an appropriate amount of carbon nanotubes (CNTs) was doped and a new material (i.e., ZnxMnO2-CNTs) is formed. Zn-HSCs are based on ZnxMnO2-CNTs as the cathode, activated carbon (ACC) as the anode, and an aqueous liquid electrolyte, which significantly improves the cycling performance of the device. In addition, the proposed ZnxMnO2-CNTs has a high electrical conductivity suitable for the development of rechargeable ZnxMnO2-CNTs //ACC Zn-HSCs devices.

Keywords: Electrochemical properties; Zn2+ ions hybrid supercapacitor; Aqueous liquid electrolyte; ZnxMnO2 (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (2)

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DOI: 10.1016/j.apenergy.2022.119730

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