Co-fabrication of nickel-YSZ cermet nanofibers via an electrospinning technique. (February 2017)

• Record Type: Journal Article
• Authors: Larsson, Tara; Li, Ting Shuai; Xu, Min; Fransson, Ida; Yu, Guangsen; Andersson, Martin; Li, Baihai; Sunden, Bengt
• Is Part Of: Materials research bulletin. Volume 86(2017)
• Page Start: 38
• Page End: 43
• Publication Date: 2017-02
• Subjects: Electrospinning -- Ni-YSZ -- Crystallization -- Viscosity -- Porosity; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2016.10.006
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: The microstructure of sample sintered at 1200 °C shows a porous network with crisscrossed bead-like cermet chains. To obtain the porosity, the image is approximated to a binary one using the Matlab code, where the black and white part represent the solid and pore space, respectively. The evolution of porosity indicates its close relationship with the crystal sizes. Highlights: Electrospinning method is used to fabricate Nickel-YSZ Cermet Nanofibers. The electrospun parameters including the external voltage and distance from needle to the collection plate are discussed. The crystallization and microstructural evolution of nanofibers are studied by sintering the fibers at different temperatures. The porosity of the structure was calcualted based on a 2D model. Abstract: In this study, we co-fabricated the Ni-based nanofibers using an electrospinning technique. The effects of viscosity, applied voltage and distance from needle to the collection plate on the fiber morphology were investigated. The fibers were sintered at temperatures ranging from 350 °C to 1200 °C and the results indicated that the crystallization was completed at 800 °C and the particle size increased with the temperature. The porosity of nanostructure can reach over 50% before reduction of the nickel oxide, which increased firstly with the temperature and then decreased over 800 °C. The nanocrystallization of an anode was helpful to maximize the electrochemical reaction sites for restraining the activation polarization and also to enlarge pores for rapid gas diffusion in fuel cells.