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.

Processing of Y3+-doped Ba(Ce,Zr)O3 by using the Sol–gel Method Assisted with Functionalized Activated Carbon as a Composite Anode for Proton Ceramic Fuel Cells

2021 ◽  
pp. 111277
Author(s):  
Nurul Afifah Mahmud ◽  
Lidyayatty Abdul Malik ◽  
Nurul Waheeda Mazlan ◽  
Nur Syafkeena Mohd Affandi ◽  
Shazana Mohd Senari ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Activated Carbon ◽  
Sol Gel ◽  
Composite Anode ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ceramic Fuel ◽  
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.

Sm0.5Sr0.5CoO3−δ infiltrated Ce0.9Gd0.1O2−δ composite cathodes for high performance protonic ceramic fuel cells

2016 ◽  
Vol 333 ◽  
pp. 24-29 ◽  
Author(s):  
Ling Zhao ◽  
Geng Li ◽  
Kongfa Chen ◽  
Yihan Ling ◽  
Yuexiao Cui ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Performance ◽  
Composite Cathodes ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

Fast response acetone-sensing properties of SnO2 nanoparticles prepared by the sol-gel method

2021 ◽  
Vol 93 (3) ◽  
pp. 30401
Author(s):  
Jiaxing Wang ◽  
Hai Yu ◽  
Yong Zhang
Keyword(s):  
High Performance ◽  
Gas Sensing ◽  
Sno2 Nanoparticles ◽  
Sol Gel ◽  
Fast Response ◽  
X Ray Diffraction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Short Recovery Time ◽  
Acetone Gas Detection

SnO2 nanoparticle architectures were successfully synthesized using a sol-gel method and developed for acetone gas detection. The morphology and structure of the particles were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The SnO2 nanoparticle architectures were configured as high-performance sensors to detect acetone and showed a very fast response time (<1 s), a short recovery time (10 s), good repeatability and high selectivity at a relatively low working temperature. Thus, SnO2 nanoparticles should be promising candidates for designing and fabricating acetone gas sensors with good gas sensing performance. The possible gas sensing mechanism is also presented.

scholarly journals Preparation and Photocatalytic Performance of ZnO/Sepiolite Composite Materials

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Chao Li ◽  
Huijuan Li ◽  
Guicheng He ◽  
Zhiwu Lei ◽  
Wenyuan Wu
Keyword(s):  
Composite Materials ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Environmental Pollutants ◽  
Chemical Properties ◽  
Treatment Method ◽  
Blue Dye ◽  
Synthesis Methods ◽  
Gel Method ◽  
Sol Gel Method

Photocatalytic technology is a widely used water treatment method, whose efficiency can be increased by developing a suitable photocatalyst fabrication procedure. In this study, five different synthesis methods were utilised for the preparation of novel ZnO/sepiolite photolytic composites, namely, sol-gel method, hydrothermal reduction, hydrolytic precipitation, powder sintering, and impregnation-reduction. The obtained photocatalysts were characterised by scanning electron microscopy, infrared spectroscopy, and X-ray diffraction. The differences between the applied photocatalyst preparation methods and the reasons for these differences were discussed, and the photocatalytic activities of the prepared composite materials were compared. The obtained results revealed that the physical structure, chemical properties, and photocatalytic performance of the composite produced by the sol-gel method were superior to those of the materials fabricated by the other four methods. Moreover, this material also exhibited high photocatalytic stability, while its photocatalytic degradation of methylene blue dye proceeded via a quasi-first-order reaction. The prepared composites have broad application prospects in photocatalysis and can be potentially used for treating environmental pollutants.

Mesoporous 3D network Ce-doped NiO nanoflakes as high performance electrodes for supercapacitor applications

2019 ◽  
Vol 43 (19) ◽  
pp. 7441-7456 ◽  
Author(s):  
P. E. Saranya ◽  
S. Selladurai
Keyword(s):  
High Performance ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
3D Network ◽  
Supercapacitor Applications

In the present study, pristine NiO- and Ce (0.5, 1.0, 1.5, and 2%)-doped NiO nanoflakes were synthesised using the sol–gel method for supercapacitor applications.

scholarly journals Ethanol/acetaldehyde conversion into butadiene over sol–gel ZrO2–SiO2 catalysts doped with ZnO

RSC Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 7140-7149 ◽  
Author(s):  
Yuchao Xu ◽  
Zongzhang Liu ◽  
Zheng Han ◽  
Minhua Zhang
Keyword(s):  
High Performance ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

High performance and stability of a ZnO/ZrO2–SiO2 catalyst prepared via a sol–gel method in ethanol and acetaldehyde conversion into 1,3-butadiene process.

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