[논문]Fuel-Flexible Anode Architecture for Solid Oxide Fuel Cells

Hwan Kim; Sunghyun Uhm

doi:10.14478/ace.2023.1021

[국내논문] Fuel-Flexible Anode Architecture for Solid Oxide Fuel Cells 원문보기

공업화학 = Applied chemistry for engineering, v.34 no.3, 2023년, pp.226 - 240

Hwan Kim (Hydrogen Energy Solution Center, Institute for Advanced Engineering) , Sunghyun Uhm (Hydrogen Energy Solution Center, Institute for Advanced Engineering)

Abstract ▼ AI-Helper

This paper provides an overview of the trends and future directions in the development of anode materials for solid oxide fuel cells (SOFCs) using hydrocarbons as fuel, with the aim of enabling a decentralized energy supply. Hydrocarbons (such as natural gas and biogas) offer promising alternatives to traditional energy sources, as their use in SOFCs can help meet the growing demands for energy. We cover several types of materials, including perovskite structures, high-entropy alloys, proton-conducting ceramic materials, anode on-cell catalyst reforming layers, and anode functional layers. In addition, we review the performance and long-term stability of cells based on these anode materials and assess their potential for commercial manufacturing processes. Finally, we present a model for enhancing the applicability of fuel cell-based power generation systems to assist in the realization of the H2 economy as the best practice for enabling distributed energy. Overall, this study highlights the potential of SOFCs to make significant progress toward a sustainable and efficient energy future.

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표/그림 (17)

그림 Figure 1. (a) Operating mechanism of hydrocarbon SOFCs. (b) Schematic diagram of the oxidation mechanism of CH4 in anodes.
그림 Figure 2. Cell potential and power density as a function of current density for a cell with a surface Pd-doped LSCM5050 dense film anode measured in 700 °C humidified CH₄[19].
그림 Figure 3. MS data of LSCrF1030 during TPR in 3% CH₄ and 150 ppm H₂S (a); CH₄ conversion and CO₂ and CO formation obtained upon LSCrF1030 during TPR in 3% CH₄ and 150 ppm H₂S (b)[20].
그림 Figure 4. (a) Power cycle stability of the LSFMo/SDC/LSGM/BSCNb cell tested at 700 °C in CH4 for 100 cycles; (b) I–V curves, (c) impedance spectra and (d) microstructures of the cross section of the single cell taken before and after power cycle test[22].
그림 Figure 5. Plots of (a) cell voltage as a function of time for SOFC with Ni-GDC and that with Ni-impregnated LSTC2-GDC anodes, operated under a current density of 600 mA/cm² at 800 °C, and (b) cell potential and power density as a function of current density and time. The arrows in (b) indicate the direction of change of performance with time. The anode and the cathode were exposed to 97% H₂ + 3% H₂O and stagnant air, respectively[24].
그림 Figure 6. Mechanism of re-oxidization in La_0.3Sr_0.7Cr_0.3Fe_0.6Co_0.1O_3-δ [31].
그림 Figure 7. (a) High-angle annular dark field (HAADF) image of the exsolved nanoparticles and (b) EDX line scan. (c-h) The EDX mapping of the R-PSFRN section, including a nanoparticle and substrate[33].
그림 Figure 8. (a-d) HAADF-STEM and EDS mapping of LPCF after oxidation in air for 4 h at 900 °C. The white circles (a) represent the exsolved Fe₂O₃ nanoparticles. The blue rectangle is magnified in (c), and the red and green rectangles (b) are magnified in (d). The size of the circle is obtained by the outermost edge of the particles[34].
그림 Figure 9. (a) Electrochemical and catalytic data over 30 h of cell test with 0.6 V bias, (b) corresponding EIS data, (c) variation of ohmic and non-ohmic polarization with time, and (d) Raman analysis and (e) (f) SEM images of post-test SOFC anodes[43].
그림 Figure 10. Change in ethane conversion, ethylene selectivity with increase in current density. The flow rates of ethane and oxygen each are 100 mL min^-1[57].
그림 Figure 11. (a) Short-term stability of the cell with LSFM and LSFM-CeO₂ anodes under a constant current of 150 mA·cm^-2 in ethane atmosphere (30 ml min^-1) at 750 °C; (b) Raman spectra collected from the Ni/BZCY and LSFM-CeO₂/BZCY anode surfaces after stability tests; (c) SEM image of the anode and electrolyte cross section and (d) SEM image of anode surface after stability test[59].
그림 Figure 12. I-V and I-P curves of the fuel cells with the 3 wt.% Ru-Al₂O₃ catalyst layer operating on a mixed gas composed of pure H2 (a), 80% CH₄ and 20% O₂ (b), 66.7% CH₄ and 33.3% H₂O (c) and 66.7% CH₄ and 33.3% CO₂ (d) at different temperatures[66].
그림 Figure 13. SEM and EDS results of the post-test Cell #3: (a) SEM image of a cross-section, (b) image of the cross-section close to the anode surface, (c) EDS line-scanning results along the track of yellow arrow, (d) microstructure of the Ni-GDC catalytic layer, and (e) EDS results of the marked area A[68].
그림 Figure 14. Bright field TEM images of in situ exsolved Ni nanoparticles in R-LMN and supported Ni nanoparticles in R-NLM. (a) Low magnification with EDS composition analysis; (b) high magnification showing partial embedment of the exsolved Ni nanoparticle into the substrate; (c) high magnification with EDS composition analysis[73].
그림 Figure 16. Time dependence of power density for the ASC and CASC fueled by CH₄-33.3 mol. % H₂O atmosphere at 800 °C and 500 mA⋅ cm^-2[76].
그림 Figure 17. Formation rate of all products of the steam reforming reaction of CH₄ on (a) LSBT and (b) LSBT-LDC anode catalysts[78].
그림 Figure 15. (a) I-V and I-P curves and (b) impedance spectra of the fuel cells with various anodes at 700 °C with methanol as fuel[75].

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메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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