Metal-Supported Solid Oxide Electrolysis Cell with Significantly Enhanced Catalysis

被引:31
|
作者
Wang, Ruofan [1 ]
Dogdibegovic, Emir [1 ]
Lau, Grace Y. [1 ]
Tucker, Michael C. [1 ]
机构
[1] Lawrence Berkeley Natl Lab, Energy Storage & Distributed Resources Div, 1 Cyclotron Rd, Berkeley, CA 94720 USA
关键词
high-temperature steam electrolysis; hydrogen production; infiltration; solid oxide electrolyzer cells; solid oxide electrolysis; TEMPERATURE WATER ELECTROLYSIS; FUEL-CELLS; HYDROGEN-PRODUCTION; STEAM ELECTROLYSIS; POLARIZATION RESISTANCE; OXYGEN-ELECTRODE; HIGH-EFFICIENCY; PERFORMANCE; DEGRADATION; STABILITY;
D O I
10.1002/ente.201801154
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
High-temperature electrolysis (HTE) using solid oxide electrolysis cells (SOECs) is a promising hydrogen production technology and has attracted substantial research attention over the last decade. While most studies are conducted on hydrogen electrode-supported type cells, SOEC operation using metal-supported cells has received minimal attention. The development of metal-supported SOECs with performance similar to the best conventional SOECs is reported. These cells have stainless steel supports on both sides, 10Sc1CeSZ electrolyte and electrode backbones, and nano-structured catalysts infiltrated on both hydrogen and oxygen electrode sides. Samarium-doped ceria (SDC) mixed with Ni is infiltrated as a hydrogen electrode catalyst, and the effect of ceria:Ni ratio is studied. On the oxygen electrode side, catalysts including lanthanum strontium manganite (LSM), lanthanum strontium cobalt ferrite (LSCF), praseodymium oxide (Pr6O11), and their composite catalysts with SDC (i.e., LSM-SDC, LSCF-SDC, and Pr6O11-SDC) are compared. Using the materials with highest catalytic activity (Pr6O11-SDC and SDC40-Ni60) and optimizing the catalyst infiltration processes, excellent electrolysis performance of metal-supported cells is achieved. Current densities of -5.31, -4.09, -2.64, and -1.62Acm(-2) are achieved at 1.3V and 50vol% steam content at 800, 750, 700, and 650 degrees C, respectively.
引用
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页数:13
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