Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (6): 1055-1060.doi: 10.3866/PKU.WHXB201404231

• THEORETICAL AND COMPUTATIONAL CHEMISTRY • Previous Articles     Next Articles

First-Principles Study on the Microstructure of Triple-Phase Boundaries in the Ni/Yttria-Stabilized Zirconia Anode

FU Zhao-Ming, WANG Ming-Yang, ZHANG Yan-Xing, ZHANG Na, YANG Zong-Xian   

  1. College of Physics and Electronic Engineering, Henan Normal University, Xinxiang 453007, Henan Province, P. R. China
  • Received:2014-02-10 Revised:2014-04-23 Published:2014-05-26
  • Contact: YANG Zong-Xian E-mail:yzx@henannu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (11247012, 11174070) and Innovation Scientists and Technicians Troop Construction Projects of Henan Province, China (104200510014).

Abstract:

Using the classical Monte Carlo method and density functional theory (DFT) calculations, various stable adsorption configurations for the Ni/yttria-stabilized zirconia anode (Ni/YSZ) were predicted. Compared with previously reported results, more stable triple phase boundary structures were found. Based on these optimized configurations, charge transfer is discussed in detail, as O ion migration occurs where electron transfer from YSZ to Ni is important in describing the electrochemical reaction at the anodes of the solid oxide fuel cells. We thus analyzed the possible factors that affect the degree of electron transfer. The results indicate that a new electrochemical mechanism is at work in the Ni/YSZ system.

Key words: Solid oxide fuel cell, First-principles, Adsorption, Triple-phase boundary, Conformational search

MSC2000: 

  • O641