A review of solid oxide steam-electrolysis cell systems: Thermodynamics and thermal integration

Min, Gyubin; Choi, Saeyoung; Hong, Jongsup

doi:10.1016/j.apenergy.2022.120145

Cited by 49 publications

(13 citation statements)

References 50 publications

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“…Existing systems typically operate above V th , which is not optimal. 131 Developing SOEC with a lower ASR init is still beneficial to LCOH because ASR can be increased by lowering the temperature during operation. In addition, LT operation decreases the heat exchange area and thermal insulation thickness, further reduces the LCOH cap .…”

Section: Discussionmentioning

confidence: 99%

Pathway toward cost-effective green hydrogen production by solid oxide electrolyzer

Liu

Clausen

wang

et al. 2023

Energy Environ. Sci.

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Section: Discussionmentioning

confidence: 99%

Pathway toward cost-effective green hydrogen production by solid oxide electrolyzer

Liu

Clausen

wang

et al. 2023

Energy Environ. Sci.

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“…From a thermodynamic point of view, the feasibility of the reaction can only be predicted under certain conditions, but not the reaction rate. Concerning the speed of oxidation reactions, other things should be considered, such as the structure, shape, and properties of the oxide layer, which affect the layer's ability to form a protective barrier [8]. Appendix figure A1 shows the types of hightemperature oxidation occurrences and weight changes.…”

Section: Introductionmentioning

confidence: 99%

The effect of aluminide coating on the steam oxidation behavior of SS321 steel at 700 °C

Shirvani,

Taheri,

Hadadipour

et al. 2023

Phys. Scr.

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Steam oxidation is considered the main attack form involved in the destruction of a superheater tubes in the superheater of water-tube boiler. In this work, the effect of an aluminide coating on the way steam reacts with SS321 steel in a superheater was studied. Aluminide coating was done by powder cementation at 800 °C for 7 h and then heat treatment at 900 °C for 1 h. The coating was made with an Al-rich Fe2Al5 phase, with an inner (diffusion) layer of 5 µm and an outer layer of 25 µm. The grains were all the same size, and there were few holes. The samples were subjected to a constant stream of supersaturated water vapor at a temperature of 700 °C. The weight gain of uncoated and coated samples was measured as 1 mg/cm2 and 0.5 mg/cm2 after 20 h, and 2.5 mg/cm2 and 0.7 mg/cm2 after 350 h, respectively. The remarkable weight loss of the coated samples after 20 h and up to 350 h was attributed to the formation of stable Al2O3 oxides. This was although in the uncoated samples, the outer and inner layers of the coating were composed of Fe-rich oxides (magnetite) and Cr-rich oxides (Cr-Fe spinel oxides), respectively. Microstructural studies showed that with the increase in oxidation time, the inner layer (diffusion) increases from 5 µm to 25 µm, which is attributed to the diffusion of substrate particles towards the coating during oxidation.

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“…5−8 Among these, SOECs have gained increasing attention in recent years due to their thermodynamic and kinetic advantages at high temperatures, which lead to the highest area-specific rates and energy efficiencies, thereby making them one of the most promising methods for hydrogen production. 9,10 However, degradation issues plague the current operational SOECs. 11−13 Even the reported lower degradation rates are 1.5−5%/kh, which have yet to meet the requirements of largescale industrialization.…”

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confidence: 99%

“…Hydrogen is widely regarded as one of the most promising energy storage media of the 21st century, playing a crucial role in the transition toward a low-carbon economy. , The electrolysis of water using excess electricity generated from renewable sources, such as solar and wind energy, has garnered significant attention. , Various methods of water electrolysis have been researched, including but not limited to alkaline electrolysis, proton-exchange-membrane electrolysis, molten carbonate electrolysis cells, and solid oxide electrolysis cells (SOECs). − Among these, SOECs have gained increasing attention in recent years due to their thermodynamic and kinetic advantages at high temperatures, which lead to the highest area-specific rates and energy efficiencies, thereby making them one of the most promising methods for hydrogen production. , …”

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confidence: 99%

Photoinduced Mitigation of Solid Oxide Electrolysis Cell Degradation: Light Healing Effect on Oxygen Vacancies

Deng,

Mei,

Xie

et al. 2024

ACS Appl. Energy Mater.

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Hydrogen energy, central to modern energy storage, is promising for use in solid oxide electrolysis cells (SOECs) due to its efficiency and production rate. However, the degradation of SOECs, possibly due to altered oxygen distribution, remains a significant challenge. This study introduces light as a method to stabilize the oxygen distribution and enhance oxygen vacancies, thus countering cell degradation. Using an LSM/GDC/YSZ/Ni-YSZ SOEC, we illuminated the LSM anode and identified a unique "light healing effect" (LHE). This effect, distinct from the photothermal influence, showcased a photoinduced hydrogen yield improvement of 270.1 mmol/m 2 /h, an 11.7% increase over that in the dark, at 800 °C and 0.8 V. In the stability test, the cell exhibited no degradation and remained stable for 50 h with the LHE, compared to a 10.95% decrease in the dark. We consistently observed the LHE across diverse tests, including tests with traditional anodes (LSM, LSC, and LSCF) and orthogonal experiments ranging from 600 to 800 °C and from 0.8 to 2 V. Our findings suggest that the LHE mechanism may be tied to the creation and buildup of photoinduced oxygen vacancies, which indicates an innovative way to avoid deactivation and even improve the performance of SOEC systems.

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A review of solid oxide steam-electrolysis cell systems: Thermodynamics and thermal integration

Cited by 49 publications

References 50 publications

Pathway toward cost-effective green hydrogen production by solid oxide electrolyzer

Pathway toward cost-effective green hydrogen production by solid oxide electrolyzer

The effect of aluminide coating on the steam oxidation behavior of SS321 steel at 700 °C

Photoinduced Mitigation of Solid Oxide Electrolysis Cell Degradation: Light Healing Effect on Oxygen Vacancies

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