Temperature and humidity dependence of the electrode polarization in intermediate-temperature fuel cells employing CsH2PO4/SiP2O7-based composite electrolytes

2008 ◽  
Vol 179 (2) ◽  
pp. 497-503 ◽  
Author(s):  
Shuichi Yoshimi ◽  
Toshiaki Matsui ◽  
Ryuji Kikuchi ◽  
Koichi Eguchi
Keyword(s):  
Fuel Cells ◽  
Intermediate Temperature ◽  
Electrode Polarization ◽  
Composite Electrolytes ◽  
Temperature And Humidity ◽  
Humidity Dependence

scholarly journals Interfacial conduction mechanism of cesium hydrogen phosphate and silicon pyrophosphate composite electrolytes for intermediate-temperature fuel cells

2016 ◽  
Vol 285 ◽  
pp. 160-164 ◽  
Author(s):  
Ryuji Kikuchi ◽  
Akari Ogawa ◽  
Takuya Matsuoka ◽  
Atsushi Takagaki ◽  
Takashi Sugawara ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Conduction Mechanism ◽  
Intermediate Temperature ◽  
Composite Electrolytes ◽  
Hydrogen Phosphate

CsH2PO4/Epoxy Composite Electrolytes for Intermediate Temperature Fuel Cells

2015 ◽  
Vol 169 ◽  
pp. 219-226 ◽  
Author(s):  
Geletu Qing ◽  
Ryuji Kikuchi ◽  
Atsushi Takagaki ◽  
Takashi Sugawara ◽  
Shigeo Ted Oyama
Keyword(s):  
Fuel Cells ◽  
Epoxy Composite ◽  
Intermediate Temperature ◽  
Composite Electrolytes

Applicability of Gd0.9Ca0.1AlO3-δ Ceramic Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells

2012 ◽  
Vol 476-478 ◽  
pp. 1785-1789 ◽  
Author(s):  
Gui Hua Liu ◽  
Fang Wang ◽  
Rui Qiang Yan
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Pure Oxygen ◽  
Electrode Polarization ◽  
Oxide Fuel ◽  
Ceramic Electrolyte ◽  
Oxygen Ion

In this paper, the applicability of Gd0.9Ca0.1AlO3-δ (GCAO) oxygen-ion conductor as ceramic electrolyte for intermediate temperature solid oxide fuel cells (SOFCs) was systematically investigated. XRD and TGA results demonstrate that GCAO material is in possession of sufficient structural stability from low to high temperature, desirable chemical stability against humidified reducing atmosphere and fine high-temperature thermal stability in air. Thermal shrinkage research during high temperature sintering shows that complete sintering of pressed green GCAO disk is around 1500 oC and the corresponding thermal expansion coefficient of sintered GCAO is 9.2×10-6 K-1 from room temperature to 1000 oC. In addition, total conductivity of GCAO ranges from 0.00073 to 0.0081 S•cm-1 in air as function of temperature increasing from 600 to 800 oC where the corresponding activation energy is determined as 96.19 KJ•mol-1. A 2-mm-thick electrolyte-supported single fuel cell was prepared with La0.8Sr0.2TiO3-δ/Ce0.8Gd0.2O2-δ and La0.8Sr0.2MnO3-δ/Ce0.8Gd0.2O2-δ as anode and cathode, and tested at 800 oC with humidified hydrogen and static air as fuel and oxidizer, respectively. The OCV reaches as high as 1.1 V which prove the pure oxygen-ion conduction of GCAO; and the corresponding maximum output and electrode polarization resistance reach 42 mW/cm2 and 0.15 Ώcm2, respectively. In summary, GCAO could be a possible electrolyte candidate for intermediate temperature SOFCs.

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