Exceptional power density and stability at intermediate temperatures in protonic ceramic fuel cells

Sihyuk Choi, Chris J. Kucharczyk, Yangang Liang, Xiaohang Zhang, Ichiro Takeuchi, Ho Il Ji, Sossina M. Haile*

*Corresponding author for this work

Research output: Contribution to journalArticle

147 Scopus citations

Abstract

Over the past several years, important strides have been made in demonstrating protonic ceramic fuel cells (PCFCs). Such fuel cells offer the potential of environmentally sustainable and cost-effective electric power generation. However, their power outputs have lagged behind predictions based on their high electrolyte conductivities. Here we overcome PCFC performance and stability challenges by employing a high-activity cathode, PrBa0.5Sr0.5Co1.5Fe0.5O5+δ (PBSCF), in combination with a chemically stable electrolyte, BaZr0.4Ce0.4Y0.1Yb0.1O3 (BZCYYb4411). We deposit a thin dense interlayer film of the cathode material onto the electrolyte surface to mitigate contact resistance, an approach which is made possible by the proton permeability of PBSCF. The peak power densities of the resulting fuel cells exceed 500 mW cm-2 at 500 °C, while also offering exceptional, long-term stability under CO2.

Original languageEnglish (US)
Pages (from-to)202-210
Number of pages9
JournalNature Energy
Volume3
Issue number3
DOIs
StatePublished - Mar 1 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

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