Origin of Polarization Losses in Solid Oxide Electrolysis Cells under High Current Density

2019 ◽  
Vol 28 (26) ◽  
pp. 77-87 ◽  
Author(s):  
Ruth Knibbe ◽  
Sune D. Ebbesen ◽  
Mogens Mogensen
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Solid Oxide ◽  
High Current ◽  
Electrolysis Cells ◽  
Solid Oxide Electrolysis ◽  
Solid Oxide Electrolysis Cells

scholarly journals Nanocomposite electrodes for high current density over 3 A cm−2 in solid oxide electrolysis cells

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Hiroyuki Shimada ◽  
Toshiaki Yamaguchi ◽  
Haruo Kishimoto ◽  
Hirofumi Sumi ◽  
Yuki Yamaguchi ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Current Density ◽  
High Current Density ◽  
Solid Oxide ◽  
High Current ◽  
Hydrogen Production Rate ◽  
Electrolysis Cells ◽  
Solid Oxide Electrolysis ◽  
Solid Oxide Electrolysis Cells ◽  
Nanocomposite Electrodes

AbstractSolid oxide electrolysis cells can theoretically achieve high energy-conversion efficiency, but current density must be further increased to improve the hydrogen production rate, which is essential to realize widespread application. Here, we report a structure technology for solid oxide electrolysis cells to achieve a current density higher than 3 A cm−2, which exceeds that of state-of-the-art electrolyzers. Bimodal-structured nanocomposite oxygen electrodes are developed where nanometer-scale Sm0.5Sr0.5CoO3−δ and Ce0.8Sm0.2O1.9 are highly dispersed and where submicrometer-scale particles form conductive networks with broad pore channels. Such structure is realized by fabricating the electrode structure from the raw powder material stage using spray pyrolysis. The solid oxide electrolysis cells with the nanocomposite electrodes exhibit high current density in steam electrolysis operation (e.g., at 1.3 V), reaching 3.13 A cm−2 at 750 °C and 4.08 A cm−2 at 800 °C, corresponding to a hydrogen production rate of 1.31 and 1.71 L h−1 cm−2 respectively.

scholarly journals High steam utilization operation with high current density in solid oxide electrolysis cells

2016 ◽  
Vol 124 (3) ◽  
pp. 213-217 ◽  
Author(s):  
Hiroyuki SHIMADA ◽  
Toshiaki YAMAGUCHI ◽  
Toshio SUZUKI ◽  
Hirofumi SUMI ◽  
Koichi HAMAMOTO ◽  
...  
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Solid Oxide ◽  
High Current ◽  
Electrolysis Cells ◽  
Solid Oxide Electrolysis ◽  
Solid Oxide Electrolysis Cells

Solid Oxide Electrolysis Cells: Degradation at High Current Densities

2010 ◽  
Vol 157 (8) ◽  
pp. B1209 ◽  
Author(s):  
Ruth Knibbe ◽  
Marie Lund Traulsen ◽  
Anne Hauch ◽  
Sune Dalgaard Ebbesen ◽  
Mogens Mogensen
Keyword(s):  
Solid Oxide ◽  
High Current ◽  
Electrolysis Cells ◽  
Solid Oxide Electrolysis ◽  
Current Densities ◽  
Solid Oxide Electrolysis Cells

scholarly journals Microstructural Degradation of Ni/YSZ Electrodes in Solid Oxide Electrolysis Cells under High Current

2013 ◽  
Vol 160 (8) ◽  
pp. F883-F891 ◽  
Author(s):  
Ming Chen ◽  
Yi-Lin Liu ◽  
Janet Jonna Bentzen ◽  
Wei Zhang ◽  
Xiufu Sun ◽  
...  
Keyword(s):  
Solid Oxide ◽  
High Current ◽  
Microstructural Degradation ◽  
Electrolysis Cells ◽  
Solid Oxide Electrolysis ◽  
Solid Oxide Electrolysis Cells

scholarly journals Boosting the performance and durability of Ni/YSZ cathode for hydrogen production at high current densities via decoration with nano-sized electrocatalysts

Nanoscale ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 4394-4406 ◽  
Author(s):  
Simona Ovtar ◽  
Xiaofeng Tong ◽  
Janet J. Bentzen ◽  
Karl T. S. Thydén ◽  
Søren Bredmose Simonsen ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
State Of The Art ◽  
Simple Procedure ◽  
The State ◽  
Solid Oxide ◽  
High Current ◽  
Electrolysis Cells ◽  
Solid Oxide Electrolysis ◽  
Current Densities ◽  
Solid Oxide Electrolysis Cells

A relatively simple procedure of infiltrating nano-sized Ce0.8Gd0.2O2−δ electrocatalysts into the state-of-the-art Ni/YSZ cathode greatly enhanced the performance and durability of solid oxide electrolysis cells.

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