Preparation and evaluation of Ni-based anodes with straight open pores for solid oxide fuel cells

Publication date: 15 March 2020Source: Journal of Alloys and Compounds, Volume 817Author(s): Yanting Tian, Xiang Guo, Pingping Wu, Xu Zhang, Zhongquan NieAbstractNi-based anode supports with straight open pores were well prepared using self-organization process. The scanning electron microscopy (SEM) results of YSZ ceramic skeletons showed that honeycomb-like structures with highly ordered straight pores were obtained. The regulation of solid loading and CaCl2 concentration on the morphology of YSZ skeletons were discussed. The YSZ skeleton with solid loading of 10 wt% and CaCl2 concentration of 1.5 mol L−1 delivered a pore size of 99 μm and a porosity of 46.9%. The solid oxide fuel cell based on Ni-YSZ anode possessed a maximum power density of 253 mW cm−2 and an ohmic resistance of 0.16 Ω cm2 at 800 °C. The pore diameter and porosity of the ceramic supports could be adjusted to expected values by further optimization of the parameters. The self-organization method will become a feasible and valid operation to produce anode supports with appropriate morphologies.

Source: Journal of Alloys and Compounds - December 12, 2019 Category: Chemistry Source Type: research