摘要
Solid oxide electrolysis cells(SOECs)provide a promising way for converting renewable energy into chemical fuels.Traditionally,NiO/CGO(nickel-gadolinium doped ceria)cermet has shown its excellent properties in ionic and electronic conductivity under reducing conditions.Herein,we developed a novel 1D NiO/CGO cathode through a cerium metal-organic framework(MOF)derived process.The cathode’s 1D nanostructure integrated with a microchannel scaffold facilitates enhanced mass transport,providing vertically aligned pathways for CO_(2)and H_(2)O diffusion.Additionally,the 1D framework increases the number of interfacial sites and reduces ion diffusion distances,thereby simplifying electron/ion transport.Consequently,this advanced cathode achieved a significant breakthrough in SOEC performance,maintaining efficient CO_(2)and H_(2)O electrolysis at an extraordinary current density of 1.41 A/cm^(2)at 1.5 V and excellent stability over 24 h at 850℃.The enhanced performance of this newly developed cathode not only achieves a remarkable 100%improvement compared to those of NiO/CGO cathodes with varying geometrical configurations but also surpasses those of commercial NiO/CGO catalysts by an outstanding 40%when tested under identical conditions.The development of the 1D NiO/CGO enhances the efficiency and durability of ceramic cathodes for CO_(2)and H_(2)O co-electrolysis in SOECs and improves the scalability and effectiveness of SOECs in renewable energy applications.
基金
supported by the National Natural Science Foundation of China(Nos.22275121,21931005,22105122,52272265)
the National Key R&D Program of China(No.2023YFA1506300)
the Shanghai Municipal Science and Technology Major Project of China,the Open Foundation Commission of Shaoxing Research Institute of Renewable Energy and Molecular Engineering,China(No.JDSX2022038)
the Project of Jiangxi Academy of Sciences,China(No.2023YSTZX01).
