Search results for "Cathode materials"

showing 3 items of 3 documents

Strontium and iron-doped barium cobaltite prepared by solution combustion synthesis: exploring a mixed-fuel approach for tailored intermediate temper…

2013

Ba0.5Sr0.5Co0.8Fe0.2O3-? (BSCF) powders were prepared by solution combustion synthesis using single and double fuels. The effect of the fuel mixture on the main properties of this well-known solid oxide fuel cell cathode material with high oxygen ion and electronic conduction was investigated in detail. Results showed that the fuel mixture significantly affected the area-specific resistance of the BSCF cathode materials, by controlling the oxygen deficiency and stabilizing the Co2+ oxidation state. It was demonstrated that high fuel-to-metal cations molar ratios and high reducing power of the combustion fuel mixture are mainly responsible for the decreasing of the area-specific resistance o…

Materials scienceCathode materialsInorganic chemistrychemistry.chemical_elementBSCFCombustionlaw.inventionchemistry.chemical_compoundOxidation statelawPhase (matter)Materials ChemistryChatode materialIntermediate temperature solid oxide fuel cellsStrontiumRenewable Energy Sustainability and the EnvironmentPerovskite-type materialsBariumPerovskite-type compoundsCombustion fuel mixtureCathodeElectronic Optical and Magnetic MaterialsCobaltiteFuel TechnologychemistrySolution combustion synthesisSolid oxide fuel cellSettore CHIM/07 - Fondamenti Chimici Delle TecnologieMaterials for Renewable and Sustainable Energy
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First principles calculations of oxygen reduction reaction at fuel cell cathodes

2020

This study was partly supported by M-ERA-NET project SunToChem (EK, YM). The computer resources were provided by Stuttgart Super-computing Center (Project DEFTD 12939). Authors thank E. Heifets, M. M. Kuklja, M. Arrigoni, D. Morgan, R. Evarestov, and D. Gryaznov for fruitful discussions.

Materials scienceCathode materialsKineticsAb initioOxideAnalytical chemistry02 engineering and technology010402 general chemistry01 natural sciencesAnalytical Chemistrylaw.inventionOxygen reduction Reaction (ORR)chemistry.chemical_compoundSurface arealawVacancy defectElectrochemistry:NATURAL SCIENCES:Physics [Research Subject Categories]PerovskitesFuel cellsPerovskite (structure)Rate determining step021001 nanoscience & nanotechnologyRate-determining stepCathode0104 chemical sciencesPolar surfaceschemistry0210 nano-technologyFirst principles calculations
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Optimized morphology and tuning the Mn3+ content of LiNi0.5Mn1.5O4 cathode material for li-ion batteries

2023

The advantages of cobalt-free, high specific capacity, high operating voltage, low cost, and environmental friendliness of spinel LiNi0.5Mn1.5O4 (LNMO) material make it one of the most promising cathode materials for next-generation lithium-ion batteries. The disproportionation reaction of Mn3+ leads to Jahn–Teller distortion, which is the key issue in reducing the crystal structure stability and limiting the electrochemical stability of the material. In this work, single-crystal LNMO was synthesized successfully by the sol-gel method. The morphology and the Mn3+ content of the as-prepared LNMO were tuned by altering the synthesis temperature. The results demonstrated that the LNMO_11…

cathode materialsli-ion batterylitiumioniakutLiNi0.5Mn1.5O4Mn3+ contentsol-gel methodGeneral Materials ScienceLiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>; sol-gel method; Mn<sup>3+</sup> content; cathode materials; li-ion batterysähkökemia
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