scholarly journals Recent Advances in High Temperature Electrolysis Cells using LaGaO3-based Electrolyte

Ceramist ◽  
2021 ◽  
Vol 24 (4) ◽  
pp. 424-437
Author(s):  
Seokhee Lee ◽  
Sang Won Lee ◽  
Suji Kim ◽  
Tae Ho Shin
Keyword(s):  
High Temperature ◽  
High Performance ◽  
High Energy ◽  
Solid Oxide ◽  
Ion Conductor ◽  
Operation Temperature ◽  
High Efficient ◽  
Electrolysis Cells ◽  
Free Hydrogen ◽  
High Temperature Electrolysis

High temperature electrolysis is a promising option for carbon-free hydrogen production and huge energy storage with high energy conversion efficiencies from renewable and nuclear resources. Over the past few decades, yttria-stabilized zirconia (YSZ) based ion conductor has been widely used as a solid electrolyte in solid oxide electrolysis cells (SOECs). However, its high operation temperature and lower conductivity in the appropriate temperature range for solid electrochemical devices were major drawbacks. Regarding improving ionic-conducting electrolytes, several groups have contributed significantly to developing and applying LaGaO3 based perovskite as a superior ionic conductor. La(Sr)Ga(Mg)O3 (LSGM) electrolyte was successfully validated for intermediate-temperature solid oxide fuel cells (SOFCs) but was rarely conducted on SOECs for its high efficient electrolysis performance. Their lower mechanical strengths or higher reactivity with electrode compared with the YSZ electrolysis cells, which make it difficult to choose compatible materials, remain major challenges. In this field, SOECs have attracted a great attention in the last few years, as they offer significant power and higher efficiencies compared to conventional YSZ based electrolysers. Herein, SOECs using LSGM based electrolyte, their applications, high performance, and their issues will be reviewed.

scholarly journals Recent Advances in High Temperature Electrolysis Cells using LaGaO3-based Electrolyte

Ceramist ◽  
2021 ◽  
Vol 24 (4) ◽  
pp. 424-437
Author(s):  
Seokhee Lee ◽  
Sang Won Lee ◽  
Suji Kim ◽  
Tae Ho Shin
Keyword(s):  
High Temperature ◽  
High Performance ◽  
High Energy ◽  
Solid Oxide ◽  
Ion Conductor ◽  
Operation Temperature ◽  
High Efficient ◽  
Electrolysis Cells ◽  
Free Hydrogen ◽  
High Temperature Electrolysis

High temperature electrolysis is a promising option for carbon-free hydrogen production and huge energy storage with high energy conversion efficiencies from renewable and nuclear resources. Over the past few decades, yttria-stabilized zirconia (YSZ) based ion conductor has been widely used as a solid electrolyte in solid oxide electrolysis cells (SOECs). However, its high operation temperature and lower conductivity in the appropriate temperature range for solid electrochemical devices were major drawbacks. Regarding improving ionic-conducting electrolytes, several groups have contributed significantly to developing and applying LaGaO3 based perovskite as a superior ionic conductor. La(Sr)Ga(Mg)O3 (LSGM) electrolyte was successfully validated for intermediate-temperature solid oxide fuel cells (SOFCs) but was rarely conducted on SOECs for its high efficient electrolysis performance. Their lower mechanical strengths or higher reactivity with electrode compared with the YSZ electrolysis cells, which make it difficult to choose compatible materials, remain major challenges. In this field, SOECs have attracted a great attention in the last few years, as they offer significant power and higher efficiencies compared to conventional YSZ based electrolysers. Herein, SOECs using LSGM based electrolyte, their applications, high performance, and their issues will be reviewed.

scholarly journals Degradation Issues in Solid Oxide Cells During High Temperature Electrolysis

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
M. S. Sohal ◽  
J. E. O’Brien ◽  
C. M. Stoots ◽  
V. I. Sharma ◽  
B. Yildiz ◽  
...  
Keyword(s):  
High Temperature ◽  
Chemical Potential ◽  
Contact Problems ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Degradation Mechanisms ◽  
Electrolysis Cells ◽  
Post Test ◽  
Solid Oxide Electrolysis Cells ◽  
High Temperature Electrolysis

Idaho National Laboratory (INL) is performing high-temperature electrolysis research to generate hydrogen using solid oxide electrolysis cells (SOECs). The project goals are to address the technical and degradation issues associated with the SOECs. This paper provides a summary of various ongoing INL and INL sponsored activities aimed at addressing SOEC degradation. These activities include stack testing, post-test examination, degradation modeling, and a list of issues that need to be addressed in future. Major degradation issues relating to solid oxide fuel cells (SOFC) are relatively better understood than those for SOECs. Some of the degradation mechanisms in SOFCs include contact problems between adjacent cell components, microstructural deterioration (coarsening) of the porous electrodes, and blocking of the reaction sites within the electrodes. Contact problems include delamination of an electrode from the electrolyte, growth of a poorly (electronically) conducting oxide layer between the metallic interconnect plates and the electrodes, and lack of contact between the interconnect and the electrode. INL’s test results on high temperature electrolysis (HTE) using solid oxide cells do not provide clear evidence of whether different events lead to similar or drastically different electrochemical degradation mechanisms. Post-test examination of the solid oxide electrolysis cells showed that the hydrogen electrode and interconnect get partially oxidized and become nonconductive. This is most likely caused by the hydrogen stream composition and flow rate during cool down. The oxygen electrode side of the stacks seemed to be responsible for the observed degradation due to large areas of electrode delamination. Based on the oxygen electrode appearance, the degradation of these stacks was largely controlled by the oxygen electrode delamination rate. Virkar and co-workers have developed a SOEC model based on concepts in local thermodynamic equilibrium in systems otherwise in global thermodynamic nonequilibrium. This model is under continued development. It shows that electronic conduction through the electrolyte, however small, must be taken into account for determining local oxygen chemical potential, within the electrolyte. The chemical potential within the electrolyte may lie out of bounds in relation to values at the electrodes in the electrolyzer mode. Under certain conditions, high pressures can develop in the electrolyte just under the oxygen electrode (anode)/electrolyte interface, leading to electrode delamination. This theory is being further refined and tested by introducing some electronic conduction in the electrolyte.

High-temperature electrolysis of simulated flue gas in solid oxide electrolysis cells

2018 ◽  
Vol 280 ◽  
pp. 206-215 ◽  
Author(s):  
Yifeng Zheng ◽  
Juan Zhou ◽  
Lan Zhang ◽  
Qinglin Liu ◽  
Zehua Pan ◽  
...  
Keyword(s):  
High Temperature ◽  
Flue Gas ◽  
Solid Oxide ◽  
Electrolysis Cells ◽  
Solid Oxide Electrolysis ◽  
Solid Oxide Electrolysis Cells ◽  
High Temperature Electrolysis

scholarly journals Achieving high strength and ductility in ODS-W alloy by employing oxide@W core-shell nanopowder as precursor

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhi Dong ◽  
Zongqing Ma ◽  
Liming Yu ◽  
Yongchang Liu
Keyword(s):  
High Temperature ◽  
Metal Matrix ◽  
High Performance ◽  
High Energy ◽  
Core Shell ◽  
Microstructural Stability ◽  
Oxide Particles ◽  
Ods Alloy ◽  
Prepared Alloy ◽  
Strength And Ductility

AbstractWith excellent creep resistance, good high-temperature microstructural stability and good irradiation resistance, oxide dispersion strengthened (ODS) alloys are a class of important alloys that are promising for high-temperature applications. However, plagued by a nerve-wracking fact that the oxide particles tend to aggregate at grain boundary of metal matrix, their improvement effect on the mechanical properties of metal matrix tends to be limited. In this work, we employ a unique in-house synthesized oxide@W core-shell nanopowder as precursor to prepare W-based ODS alloy. After low-temperature sintering and high-energy-rate forging, high-density oxide nanoparticles are dispersed homogeneously within W grains in the prepared alloy, accompanying with the intergranular oxide particles completely disappearing. As a result, our prepared alloy achieves a great enhancement of strength and ductility at room temperature. Our strategy using core-shell powder as precursor to prepare high-performance ODS alloy has potential to be applied to other dispersion-strengthened alloy systems.

scholarly journals Development of high-temperature electrochemical TEM and its application on solid oxide electrolysis cells

2021 ◽  
Vol 27 (S1) ◽  
pp. 3138-3139
Author(s):  
Søren Bredmose Simonsen ◽  
Waynah Lou Dacayan ◽  
Zhongtao Ma ◽  
Christodoulos Chatzichristodoulou ◽  
Wenjing Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid Oxide ◽  
Electrolysis Cells ◽  
Solid Oxide Electrolysis ◽  
Solid Oxide Electrolysis Cells

Carbon Tolerant Double Site Doped Perovskite Cathodes for High-Temperature Electrolysis Cells

2017 ◽  
Vol 78 (1) ◽  
pp. 3257-3265
Author(s):  
Boxun Hu ◽  
Ashish N Aphale ◽  
Chiying Liang ◽  
Su Jeong Heo ◽  
Md Aman Uddin ◽  
...  
Keyword(s):  
High Temperature ◽  
Electrolysis Cells ◽  
High Temperature Electrolysis
Sign in / Sign up

Export Citation Format

Share Document