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Cathode Materials for Solid Oxide Fuel Cells

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Energy Materials".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 1565

Special Issue Editor

Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, PL–30239 Krakow, Poland
Interests: nanomaterials; solid-oxide fuel cells; aluminum-ion batteries; corrosion; alloys; soft matter nanostructures
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Solid oxide fuel cells (SOFCs) have the highest efficiency among all energy conversion devices and are attractive devices for energy storage in operating reversible modes. Decreasing the operational temperature of SOFCs allows them to be applied in more areas and also increases the durability of the cells. However, lowering the temperature to a range that is safe in terms of material durability, called the intermediate temperature (IT) range (500–800 °C), or to a low temperature range (350–500 °C) increases energy losses due to the slow electrode reactions, which is especially serious in the case of cathode reactions.

This Special Issue is focused on:

Describing new cathode materials for solid oxide fuel cells and proton-conducting fuel cells, oxygen electrode materials for solid oxide electrolyse cells, reversible solid oxide cells, improving the performance of existing electrode materials by lowering the polarization resistance and enhancing the kinetic of oxygen reduction reaction or oxygen evolution reaction, describing their mechanism.

We seek high-quality works that focus on the latest advancements in topics such as material development; material preparation methods; electrochemical methods devoted to the analysis of cathode and oxygen electrode reaction mechanisms as well as sources of energy losses; single-cell, stack, and hybrid systems; modelling and numerical analysis; and descriptions of degradation mechanisms. Submissions covering other topics will also be considered if they are relevant to the Special Issue theme.

Dr. Michał Mosiałek
Guest Editor

Manuscript Submission Information

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Keywords

  • cathode materials
  • oxygen electrode materials
  • oxygen reduction reaction
  • solid oxide fuel cells
  • proton conducting fuel cells
  • solid oxide electrolyze cells
  • reversible solid oxide cells
  • materials preparation methods

Published Papers (1 paper)

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Research

15 pages, 5759 KiB  
Article
Triple Perovskite Nd1.5Ba1.5CoFeMnO9−δ-Sm0.2Ce0.8O1.9 Composite as Cathodes for the Intermediate Temperature Solid Oxide Fuel Cells
by Yunru Chen, Tao Yu, Jiang Jin and Hua Zhang
Materials 2022, 15(10), 3663; https://doi.org/10.3390/ma15103663 - 20 May 2022
Cited by 2 | Viewed by 1216
Abstract
Triple perovskite has been recently developed for the intermediate temperature solid oxide fuel cell (IT-SOFC). The performance of Nd1.5Ba1.5CoFeMnO9−δ (NBCFM) cathodes for IT-SOFC is investigated in this work. The interfacial polarization resistance (RP) of NBCFM is [...] Read more.
Triple perovskite has been recently developed for the intermediate temperature solid oxide fuel cell (IT-SOFC). The performance of Nd1.5Ba1.5CoFeMnO9−δ (NBCFM) cathodes for IT-SOFC is investigated in this work. The interfacial polarization resistance (RP) of NBCFM is 1.1273 Ω cm2~0.1587 Ω cm2 in the range of 700–800 °C, showing good electrochemical performance. The linear thermal expansion coefficient of NBCFM is 17.40 × 10−6 K−1 at 40–800 °C, which is significantly higher than that of the electrolyte. In order to further improve the electrochemical performance and reduce the thermal expansion coefficient (TEC) of NBCFM, Ce0.8Sm0.2O2−δ (SDC) is mixed with NBCFM to prepare an NBCFM-xSDC composite cathode (x = 0, 10, 20, 30, 40 wt.%). The thermal expansion coefficient decreases monotonically from 17.40 × 10−6 K−1 to 15.25 × 10−6 K−1. The surface oxygen exchange coefficient of NBCFM-xSDC at a given temperature increases from 10−4 to 10−3 cm s−1 over the po2 range from 0.01 to 0.09 atm, exhibiting fast surface exchange kinetics. The area specific resistance (ASR) of NBCFM-30%SDC is 0.06575 Ω cm2 at 800 °C, which is only 41% of the ASR value of NBCFM (0.15872 Ω cm2). The outstanding performance indicates the feasibility of NBCFM-30% SDC as an IT-SOFC cathode material. This study provides a promising strategy for designing high-performance composite cathodes for SOFCs based on triple perovskite structures. Full article
(This article belongs to the Special Issue Cathode Materials for Solid Oxide Fuel Cells)
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