Catalytic Surface Promotion of Composite Cathodes in Protonic Ceramic Fuel Cells

2015 ◽  
Vol 2 (8) ◽  
pp. 1106-1110 ◽  
Author(s):  
Cecilia Solís ◽  
Laura Navarrete ◽  
Francesco Bozza ◽  
Nikolaos Bonanos ◽  
José M. Serra
Keyword(s):  
Fuel Cells ◽  
Catalytic Surface ◽  
Composite Cathodes ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

Catalysts for composite cathodes of protonic ceramic fuel cells

2018 ◽  
Vol 44 (7) ◽  
pp. 8423-8426 ◽  
Author(s):  
EunKyong Shin ◽  
Minho Shin ◽  
Hanjin Lee ◽  
Jong-Sung Park
Keyword(s):  
Fuel Cells ◽  
Composite Cathodes ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

scholarly journals Compositional Engineering of a La1-xBaxCoO3-δ-(1-a) BaZr0.9Y0.1O2.95 (a = 0.6, 0.7, 0.8 and x = 0.5, 0.6, 0.7) Nanocomposite Cathodes for Protonic Ceramic Fuel Cells

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3441
Author(s):  
Laura Rioja-Monllor ◽  
Carlos Bernuy-Lopez ◽  
Marie-Laure Fontaine ◽  
Tor Grande ◽  
Mari-Ann Einarsrud
Keyword(s):  
Fuel Cells ◽  
Electrochemical Performance ◽  
Single Phase ◽  
Controlled Atmospheres ◽  
Composite Cathodes ◽  
Phase Precursor ◽  
One Step ◽  
Ceramic Fuel ◽  
Symmetrical Cell ◽  
Ceramic Fuel Cells

Compositionally engineered a La1-xBaxCoO3-δ-(1-a) BaZr0.9Y0.1O2.95 (a = 0.6, 0.7, 0.8 and x = 0.5, 0.6, 0.7) (LBZ) nanocomposite cathodes were prepared by oxidation driven in situ exsolution of a single-phase material deposited on a BaZr0.9Y0.1O2.95 electrolyte. The processing procedure of the cathode was optimized by reducing the number of thermal treatments as the single-phase precursor was deposited directly on the electrolyte. The exsolution and firing of the cathodes occurred in one step. The electrochemical performance of symmetrical cells with the compositionally engineered cathodes was investigated by impedance spectroscopy in controlled atmospheres. The optimized materials processing gave web-like nanostructured cathodes with superior electrochemical performance for all compositions. The area specific resistances obtained were all below 12 Ω·cm2 at 400 °C and below 0.59 Ω·cm2 at 600 °C in 3% moist synthetic air. The resistances of the nominal 0.6 La0.5Ba0.5CoO3-δ-0.4 BaZr0.9Y0.1O2.95 and 0.8 La0.5Ba0.5CoO3-δ-0.2 BaZr0.9Y0.1O2.95 composite cathodes were among the lowest reported for protonic ceramic fuel cells cathodes in symmetrical cell configuration with ASR equal to 4.04 and 4.84 Ω·cm2 at 400 °C, and 0.21 and 0.27 Ω·cm2 at 600 °C, respectively.

A new oxygen reduction electrocatalyst of barium lanthanide cobaltate for composite cathodes of proton-conducting ceramic fuel cells

2018 ◽  
Vol 6 (29) ◽  
pp. 14188-14194 ◽  
Author(s):  
Toshiaki Matsui ◽  
Kohei Manriki ◽  
Kazunari Miyazaki ◽  
Hiroki Muroyama ◽  
Koichi Eguchi
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction ◽  
Proton Conducting ◽  
Composite Cathodes ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

A new oxygen reduction electrocatalyst of barium lanthanide cobaltate of Ba4Sr2Sm2Co4O15 (BSSC) for composite cathodes of proton-conducting ceramic fuel cells.

scholarly journals High-Performance La0.5Ba0.5Co1/3Mn1/3Fe1/3O3−δ-BaZr1−zYzO3−δ Cathode Composites via an Exsolution Mechanism for Protonic Ceramic Fuel Cells

Inorganics ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 83 ◽  
Author(s):  
Laura Rioja-Monllor ◽  
Sandrine Ricote ◽  
Carlos Bernuy-Lopez ◽  
Tor Grande ◽  
Ryan O’Hayre ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Performance ◽  
Single Phase ◽  
Composite Cathode ◽  
Nominal Composition ◽  
Composite Cathodes ◽  
Phase Precursor ◽  
Ceramic Fuel ◽  
Two Phases ◽  
Ceramic Fuel Cells

A novel exsolution process was used to fabricate complex all-oxide nanocomposite cathodes for Protonic Ceramic Fuel Cells (PCFCs). The nanocomposite cathodes with La0.5Ba0.5Co1/3Mn1/3Fe1/3O3−δ-BaZr1−zYzO3−δ nominal composition were prepared from a single-phase precursor via an oxidation-driven exsolution mechanism. The exsolution process results in a highly nanostructured and intimately interconnected percolating network of the two final phases, one proton conducting (BaZr1−zYzO3−δ) and one mixed oxygen ion and electron conducting (La0.5Ba0.5Co1/3Mn1/3Fe1/3O3−δ), yielding excellent cathode performance. The cathode powder is synthesized as a single-phase cubic precursor by a modified Pechini route followed by annealing at 700 °C in N2. The precursor phase is exsolved into two cubic perovskite phases by further heat treatment in air. The phase composition and chemical composition of the two phases were confirmed by Rietveld refinement. The electrical conductivity of the composites was measured and the electrochemical performance was determined by impedance spectroscopy of symmetrical cells using BaZr0.9Y0.1O2.95 as electrolyte. Our results establish the potential of this exsolution method where a large number of different cations can be used to design composite cathodes. The La0.5Ba0.5Co1/3Mn1/3Fe1/3O3−δ-BaZr0.9Y0.1O2.95 composite cathode shows the best performance of 0.44 Ω∙cm2 at 600 °C in 3% moist synthetic air.

scholarly journals La0.6Sr0.4Co0.2Fe0.8O3−δ–Ba(Ce,Co,Y)O3−δ Composite Cathodes for Proton-conducting Ceramic Fuel Cells

2020 ◽  
Vol 88 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Kazunari MIYAZAKI ◽  
Yidan DING ◽  
Hiroki MUROYAMA ◽  
Toshiaki MATSUI ◽  
Koichi EGUCHI
Keyword(s):  
Fuel Cells ◽  
Proton Conducting ◽  
Composite Cathodes ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

Oxygen reduction reaction over (Ba,Sr)6RE2Co4O15–Ba(Ce,Pr,Y)O3 composite cathodes for proton-conducting ceramic fuel cells

2021 ◽  
Author(s):  
Toshiaki Matsui ◽  
Naoki Kunimoto ◽  
Kohei Manriki ◽  
Kazunari Miyazaki ◽  
Naoto Kamiuchi ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Reaction Mechanism ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Composite Cathode ◽  
Reduction Reaction ◽  
Proton Conducting ◽  
Composite Cathodes ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

The oxygen reduction reaction mechanism on the Ba5SrGd2Co4O15–BaCe0.5Pr0.3Y0.2O3−δ (BSGC–BCPY) composite cathode for proton-conducting fuel cells.

Electrochemical Performance of Anode-Supported Protonic Ceramic Fuel Cells with Various Composite Cathodes

2019 ◽  
Vol 91 (1) ◽  
pp. 1075-1083
Author(s):  
Hiroyuki Shimada ◽  
Toshiaki Yamaguchi ◽  
Yuki Yamaguchi ◽  
Yoshinobu Fujishiro ◽  
Yasunobu Mizutani
Keyword(s):  
Fuel Cells ◽  
Electrochemical Performance ◽  
Composite Cathodes ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

Processing of high performance composite cathodes for protonic ceramic fuel cells by exsolution

2019 ◽  
Vol 7 (14) ◽  
pp. 8609-8619 ◽  
Author(s):  
Laura Rioja-Monllor ◽  
Carlos Bernuy-Lopez ◽  
Marie-Laure Fontaine ◽  
Tor Grande ◽  
Mari-Ann Einarsrud
Keyword(s):  
Fuel Cells ◽  
Composite Materials ◽  
High Performance ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composite Cathodes ◽  
High Performance Composite ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

La0.5Ba0.5CoO3−δ–BaZrO3 (LB–BZ)-based composite materials were prepared by a modified Pechini sol–gel method combined with exsolution.

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