In situobservation of water in a fuel cell catalyst using scanning electron microscopy

Microscopy ◽  
2014 ◽  
Vol 64 (2) ◽  
pp. 87-96 ◽  
Author(s):  
Satoru Ueda ◽  
Yoshio Kobayashi ◽  
Satoshi Koizumi ◽  
Yasuyuki Tsutsumi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Fuel Cell Catalyst ◽  
Scanning Electron

Subsolidus phase relations in the La2O3–Fe2O3–Al2O3 system

2001 ◽  
Vol 16 (3) ◽  
pp. 822-827
Author(s):  
Danjela Kuščer ◽  
Slavko Bernik ◽  
Marko Hrovat ◽  
Janez Holc
Keyword(s):  
Electron Microscopy ◽  
Phase Diagram ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Solid Oxide ◽  
Phase Relations ◽  
Oxide Fuel ◽  
Subsolidus Phase ◽  
X Ray ◽  
Scanning Electron

The subsolidus phase relations in the La–Fe–Al–O system were investigated for solid oxide fuel cell (SOFC) applications. Five compounds, LaAlO3, LaAl11O18, LaFe12O19, AlFeO3, and LaFeO3, coexist in the La–Fe–Al–O system at 1380 °C in air. The microstructure and composition of the samples were studied by x-ray diffractometry and scanning electron microscopy. Based on experimental evidence, a phase diagram of the La2O3–Al2O3–Fe2O3 system has been proposed.

scholarly journals Imaging of Fuel Cell and Battery Electrodes Using Focused Ion Beam Scanning Electron Microscopy

2016 ◽  
Vol 22 (S3) ◽  
pp. 1310-1311 ◽  
Author(s):  
Scott Barnett ◽  
Hongqian Wang ◽  
Zhao Liu ◽  
David Kennouche ◽  
Kyle Yakal-Kremski
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Beam Scanning ◽  
Scanning Electron

Hydrophilic ePTFE-Based Composite Membranes for PEMFCs

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Jinjun Shi ◽  
Bor Jang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Composite Membrane ◽  
Dimensional Stability ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Equivalent Weight ◽  
Scanning Electron Microscopy Micrographs ◽  
Scanning Electron

A hydrophilic expanded poly(tetrafluoroethylene) (ePTFE) based composite membrane was prepared and tested for proton exchange fuel cell applications. The composite membrane was prepared by impregnating hydrophilic ePTFE membrane with 5% Nafion solution (equivalent weight=1000). This new composite membrane showed higher water uptake (12.7%) than that of normal hydrophobic ePTFE based composite membrane (6.3%) and better proton conductivity. Scanning electron microscopy micrographs showed that the hydrophilic ePTFE based membrane can easily form a dense composite membrane while hydrophobic ePTFE based composite membranes tend to have micropores inside. The hydrophilic ePTFE based composite membrane showed better thermal and dimensional stability than recast Nafion membrane.

scholarly journals PENGARUH SUHU SINTERING TERHADAP KEKERASAN PADUAN MIKRO Fe-Cr HASIL METODE ULTRASONIK

2018 ◽  
Vol 3 (2) ◽  
pp. 89-97
Author(s):  
Kusdi Prijono ◽  
Amin Suhadi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Ultrasonic Method ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Alloy Particles ◽  
Scanning Electron

AbstrakFe-Cr      merupakan  paduan yang memiliki ketahanan pada suhu tinggi dan kemampuan yang dapat digunakan sebagai interkonek pada sel bakar Solid Oxide Fuel Cell (SOFC). Pada penelitian ini telah dilakukan sintesis bongkah paduan Fe-Cr dengan menggunakan serbuk paduan mikro Fe-Cr hasil sintesis dengan metode ultrasonik. Metode ultrasonik dimanfaatkan untuk sintesis paduan mikro Fe-Cr melalui penggunaan gelombang suara ultrasonik. Langkah yang dilakukan adalah memadatkan partikel paduan mikro Fe-Cr dengan  kompaksi tanpa lubrikan, hasil kompaksi dimasukan kedalam kapsul kaca kuarsa selanjutnya dilakukan  proses variasi sintering 11000C, 12000C dan 13000C pada kondisi suhu maximal ditahan selama 1 jam , lalu didinginkan secara normal dalam tungku. Karakterisasi strukturmikro dilakukan dengan Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (SEM-EDS), X-Ray Diffraction (XRD) disertai analisis dengan metode MAUD (Material Analisys Using Diffraction ) dan pengukuran Nilai kekerasan sesungguhnya. Partikel paduan mikro Fe-Cr lebih stabil dan konsisten dalam pembentukan fasa bongkah paduan Fe-Cr melalui variasi sintering. Diperoleh bongkah paduan Fe-Cr homogen tanpa oksida.Kata kunci: Paduan mikro Fe-Cr, Ultrasonik, Kapsul Kuarsa, Sintering AbstractFe-Cr is an alloy that has a high temperature resistance and is potential to be used as an interconnect on Solid Oxide Fuel Cell (SOFC) fuel cells. In this research, Fe-Cr alloys have been synthesized using Super Fe-Cr micro alloy powder with ultrasonic method. The ultrasonic method is utilized for the synthesis of Fe-Cr micro alloys through the use of ultrasonic sound waves. The steps taken were the consolidation of the Fe-Cr micro alloy particles through compaction without lubricant, then in a quartz glass capsule a sintering process variation of 11000C, 12000C and 13000C at maximum temperature conditions retained for 1 hour, then cooled normally in the furnace. Characterization of microstructure was performed by Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (SEM-EDS), X-Ray Diffraction (XRD) with analysis by MAUD method (Material Analisys Using Diffraction) and actual density measurement. The Fe-Cr micro alloy particles are more stable and consistent in the formation of the Fe-Cr alloy phase via sintering variations. The alloys of Fe-Cr are homogenous without oxide.Keyword : Micro-alloy Fe-Cr, Ultrasonic, Capsule Quartz, Sintering

scholarly journals PENGARUH PADUAN MIKRO Fe Cr DENGAN METODE ULTRASONIK PADA PEMBENTUKAN BONGKAH Fr Cr MELALUI VARIASI SUHU SINTERING

2019 ◽  
Vol 9 (1) ◽  
pp. 1-7
Author(s):  
Kusdi Prijono ◽  
Amin Suhadi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Fe-Cr merupakan paduan yang memiliki ketahanan pada suhu tinggi dan kemampuan yang dapat digunakansebagai interkonek pada sel bakar Solid Oxide Fuel Cell (SOFC). Pada penelitian ini telah dilakukan sintesisbongkah paduan Fe-Cr dengan menggunakan serbuk paduan mikro Fe-Cr hasil sintesis dengan metode ultrasonik.Metode ultrasonik dimanfaatkan untuk sintesis paduan mikro Fe-Cr melalui penggunaan gelombang suaraultrasonik. Langkah yang dilakukan adalah memadatkan partikel paduan mikro Fe-Cr dengan kompaksi tanpalubrikan, hasil kompaksi dimasukan kedalam kapsul kaca kuarsa selanjutnya dilakukan proses variasi sintering11000C, 12000C dan 13000C pada kondisi suhu maximal ditahan selama 1 jam ,lalu didinginkan secara normaldalam tungku. Karakterisasi strukturmikro dilakukan dengan Scanning Electron Microscopy (SEM), EnergyDispersive X-Ray Spectroscopy (SEM-EDS), X-Ray Diffraction (XRD) disertai analisis dengan metode MAUD(Material Analisys Using Diffraction ) dan pengukuran Nilai kekerasan sesungguhnya. Partikel paduan mikro Fe-Crlebih stabil dan konsisten dalam pembentukan fasa bongkah paduan Fe-Cr melalui variasi sintering. Diperolehbongkah paduan Fe-Cr homogen tanpa oksida.

A 5-cm2 PEM Fuel Cell Gas Diffusion Layer Experimental Study and Scanning Electron Microscopy Visualization

2019 ◽  
Author(s):  
Jose Montoya Segnini ◽  
Gerardo Carbajal
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Gas Diffusion ◽  
Carbon Paper ◽  
Carbon Cloth ◽  
Gas Diffusion Layers ◽  
Diffusion Layers ◽  
Scanning Electron

Abstract The present experimental study aims to determine the effect of two different gas diffusion layers in the performance of a 5-cm2 proton exchange membrane (PEM) fuel cell. The gas diffusion layers consisted of a carbon cloth gas diffusion (GDL-CT) and a non-woven carbon paper (Sigracet 25 BC, Sigracet 29, and BC Sigracet 35 BC). The effect of the GDL parameters on the fuel cell performance was evaluated by the polarization curve. Based on the polarization curve results, it was confirmed that the carbon cloth gas diffusion layer had a better performance than the non-woven carbon. Different temperatures, hydrogen flow rates and inlet pressures were tested. Images from the scanning electron microscopy were obtained to visualize the internal structure of a carbon paper GDL and a carbon cloth GDL; it was observed different surface structures between them.

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