The thermal effects of all porous solid oxide fuel cells

Haoran Xu, Bin Chen, Peng Tan, Yuan Zhang, Qijiao He, Zhen Wu, Meng Ni

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

All porous solid oxide fuel cells adopt a porous electrolyte to resist coking caused by hydrocarbon fuels such as methane. With O2 molecules coming from the cathode, chemical oxidation reactions occur at the anode, competing with the electrochemical oxidations with O2− ions. These reactions release a lot of heat, thus significantly affects the cell's power density and fuel efficiency. In this paper, we developed a 2D thermal-electrochemical model to study its thermal effects. After model validation, parametric studies are conducted to investigate the impact of operating condition and cell structure. Cell performance, including power density, coking resistance, peak cell temperature, heat source composition, and energy efficiency is analysed. Notably, the detailed heat-releasing processes at different operating conditions are discussed. A power density of 373 mW cm−2 is obtained when a CH4 and O2 concentration of 10% and an electrolyte thickness of 200 μm are adopted. This model can serve as a useful tool for the optimization of operating conditions and geometry design to improve the performance and coking resistance of solid oxide fuel cells.

Original languageEnglish
Article number227102
JournalJournal of Power Sources
Volume440
DOIs
Publication statusPublished - 15 Nov 2019

Keywords

  • All porous solid oxide fuel cell
  • Carbon deposition
  • Coking
  • Mathematical modeling

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this