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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems
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Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems

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A Redox-Robust Ceramic Anode-Supported Low-Temperature Solid Oxide Fuel Cell.

A Mohammed Hussain1,2,3, Yi-Lin Huang1,2, Ke-Ji Pan1,2,4

  • 1Maryland Energy Innovation Institute, University of Maryland, College Park, Maryland 20742, United States.

ACS Applied Materials & Interfaces
|March 21, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a new ceramic anode for low-temperature solid oxide fuel cells (LT-SOFCs) that overcomes stability issues. The novel anode material demonstrates excellent performance and durability through numerous redox cycles.

Keywords:
SOFCinfiltrationlow temperature ceramic anodesredox stabilitysurface decoration

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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Conversion

Background:

  • Low-temperature solid oxide fuel cells (LT-SOFCs) face challenges with electrode stability, particularly Ni-cermet anodes, due to volume changes during redox cycles.
  • These volume changes lead to performance degradation and eventual cell failure in conventional LT-SOFC designs.

Purpose of the Study:

  • To develop a redox-stable ceramic anode for LT-SOFCs.
  • To improve the long-term operational stability and performance of LT-SOFCs.

Main Methods:

  • Fabrication of a SrFe0.2Co0.4Mo0.4O3 (SFCM)/Ce0.9Gd0.1O2 ceramic anode-supported LT-SOFC.
  • Evaluation of cell performance, including open circuit voltage and power density.
  • Testing of redox stability under harsh operating conditions.

Main Results:

  • Achieved a high open circuit voltage of ~0.9 V and a peak power density of 500 mW/cm2 at 600 °C in hydrogen.
  • Demonstrated remarkable stability over tens of redox cycles.
  • Identified oxygen nonstoichiometry in SFCM as the mechanism for compensating dimensional changes during redox cycles.

Conclusions:

  • The developed ceramic anode-supported LT-SOFC exhibits high performance and exceptional redox stability.
  • This all-ceramic cell design offers a promising pathway for next-generation LT-SOFCs.