| 학회 |
한국공업화학회 |
| 학술대회 |
2014년 가을 (11/12 ~ 11/14, 엑스코(대구)) |
| 권호 |
18권 2호 |
| 발표분야 |
(국제협력위원회)우수 외국인 연구자를 위한 세션 |
| 제목 |
Intermediate-Temperature Solid Oxide Electrolysis Cell with Bi-layered Electrolyte Structure |
| 초록 |
A Ni-GDC supported solid oxide electrolysis cell with bi-layered ScSZ/GDC electrolyte and LSCF oxygen electrode was developed for intermediate-temperature steam and CO2 electrolysis. The OCV of bi-layered electrolyte cell was significantly improved as compared to cell with single-layered GDC electrolyte structure, but at the cost of an increase in electrolyte resistance (Re) and electrode polarization resistance (Rp). The formation of (Zr, Ce)O2 solid solution at the interfaces of ScSZ interlayer during co-sintering caused the increase in Re and Rp. Unlike single-layered GDC electrolyte cell, the bi-layered electrolyte cell did not show a noticeable internal electrical shorting under SOEC conditions and thus exhibited a good electrolysis performance. However, the cell stability test revealed a performance decay at the rate of 5 mV/h, when operated in co-electrolysis (H2:steam:CO2 = 20:40:40 vol.%) under -0.5A/cm2 at 650oC over 100h. |
| 저자 |
Asif Mahmood1, Saira Bano1, Ji Haeng Yu2, 이규호1
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| 소속 |
1KRICT / UST, 2KIER / UST |
| 키워드 |
Solid oxide electrolysis cell; Bi-layered electrolyte; Steam; Carbon dioxide; Electrochemical impedance spectroscopy
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| E-Mail |
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