Nanoengineering modification of Ni-YSZ anode using in-situ solvothermal process in solid oxide fuel cells with internally reformed fuel. (10th March 2023)

• Record Type: Journal Article
• Authors: Liu, Zhixiang; Zhang, Yang; Yang, Jun; Guan, Wanbing; Wang, Jianxin; Singhal, Subhash C.; Wang, Lianbang
• Is Part Of: Electrochimica acta. Volume 444(2023)
• Publication Date: 2023-03-10
• Subjects: Solid oxide fuel cells -- In-situ solvothermal -- Methane -- Internal reforming -- Distribution of relaxation times; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2023.141986
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: GDC@Ni-YSZ anode was synthesized by in-situ solvothermal strategy. The electrode reaction kinetics was elucidated with DRT analysis. The decorated GDC are beneficial to internal reforming reactions of methane. The modified single cell exhibits of ∼700 h stability under methane atmosphere. No obvious carbon deposition occurred on the anode surface of the post-test cell. Abstract: The conventional Ni-Y0.16 Zr0.84 O1.92 anode in solid oxide fuel cells fueled with hydrocarbon fuels is prone to suffer from carbon deposition. In this work, we employed an in-situ solvothermal method to decorate the Ni-Y0.16 Zr0.84 O1.92 anode with Gd0.1 Ce0.9 O1.95-δ nanoparticles to improve its resistance to carbon deposition and thus improve the electrochemical performance of the cell. This method generates small Gd0.1 Ce0.9 O1.95-δ particles and at the same time does not block the gas diffusion channels. The Gd0.1 Ce0.9 O1.95-δ -decorated anode showed enhanced long-term stability in methane with no significant performance degradation after 700 at 750 °C, whereas an untreated Ni-Y0.16 Zr0.84 O1.92 anode only worked for less than 8 h under the same conditions. The addition of Gd0.1 Ce0.9 O1.95-δ nanoparticles was found to enhance internal reforming reactions of methane by the distribution of relaxation times technique. This work demonstrated that in-situ solvothermal modification strategy can provide anodes with excellent carbon deposition resistance. Graphical abstract: Image, graphical abstract