TY - JOUR
T1 - Advanced oxygen-electrode-supported solid oxide electrochemical cells with Sr(Ti,Fe)O3-: δ-based fuel electrodes for electricity generation and hydrogen production
AU - Zhang, Shan Lin
AU - Wang, Hongqian
AU - Yang, Tianrang
AU - Lu, Matthew Y.
AU - Li, Cheng Xin
AU - Li, Chang Jiu
AU - Barnett, Scott A.
N1 - Funding Information:
The authors gratefully acknowledge nancial support by the Department of Energy grant # DE-SC0016965. Initial development of the oxygen-electrode-supported cells was done under support from the National Science Foundation (DMR-1912530), and electrochemical performance was analyzed under support from Department of Energy (DE-EE0008437). Shan-Lin Zhang gratefully acknowledges the scholarship from the State Scholarship Fund of China Scholarship Council (201606285002). The authors at Xi'an Jiaotong University acknowledge National Natural Science Foundation of China (grant no. 51602248) for support of stability test. This work made use of the EPIC facility of Northwestern University's NUANCE Center, which has received support from the So and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. This work made use of the MatCI Facility which receives support from the MRSEC Program (NSF DMR-1720139) of the Materials Research Center at Northwestern University.
Funding Information:
The authors gratefully acknowledge financial support by the Department of Energy grant # DE-SC0016965. Initial development of the oxygen-electrode-supported cells was done under support from the National Science Foundation (DMR-1912530), and electrochemical performance was analyzed under support from Department of Energy (DE-EE0008437). Shan-Lin Zhang gratefully acknowledges the scholarship from the State Scholarship Fund of China Scholarship Council (201606285002). The authors at Xi'an Jiaotong University acknowledge National Natural Science Foundation of China (grant no. 51602248) for support of stability test. This work made use of the EPIC facility of Northwestern University's NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. This work made use of the MatCI Facility which receives support from the MRSEC Program (NSF DMR-1720139) of the Materials Research Center at Northwestern University.
Publisher Copyright:
© 2020 The Royal Society of Chemistry.
PY - 2020/12/28
Y1 - 2020/12/28
N2 - Sr(Ti0.3Fe0.7)O3-δ (STF) and the associated exsolution electrodes Sr0.95(Ti0.3Fe0.63Ru0.07)O3-δ (STFR), or Sr0.95(Ti0.3Fe0.63Ni0.07)O3-δ (STFN) are alternatives to Ni-based cermet fuel electrodes for solid oxide electrochemical cells (SOCs). They can provide improved tolerance to redox cycling and fuel impurities, and may allow direct operation with hydrocarbon fuels. However, such perovskite-oxide-based electrodes present processing challenges for co-sintering with thin electrolytes to make fuel electrode supported SOCs. Thus, they have been mostly limited to electrolyte-supported SOCs. Here, we report the first example of the application of perovskite oxide fuel electrodes in novel oxygen electrode supported SOCs (OESCs) with thin YSZ electrolytes, and demonstrate their excellent performance. The OESCs have La0.8Sr0.2MnO3-δ-Zr0.92Y0.16O2-δ (LSM-YSZ) oxygen electrode-supports that are enhanced via infiltration of SrTi0.3Fe0.6Co0.1O3-δ, while the fuel electrodes are either Ni-YSZ, STF, STFN, or STFR. Fuel cell power density as high as 1.12 W cm-2 is obtained at 0.7 V and 800 °C in humidified hydrogen and air with the STFR electrode, 60% higher than the same cell made with a Ni-YSZ electrode. Electrolysis current density as high as -1.72 A cm-2 is obtained at 1.3 V and 800 °C in 50% H2O to 50% H2 mode; the STFR cell yields a value 72% higher than the same cell made with a Ni-YSZ electrode, and competitive with the widely used conventional Ni-YSZ-supported cells. The high performance is due in part to the low resistance of the thin YSZ electrolyte, and also to the low fuel electrode polarization resistance, which decreases with fuel electrode in the order: Ni-YSZ > STF > STFN > STFR. The high performance of the latter two electrodes is due to exsolution of catalytic metal nanoparticles; the results are discussed in terms of the microstructure and properties of each electrode material, and surface oxygen exchange resistance values are obtained over a range of conditions for STF, STFN, and STFN. The STF fuel electrodes also provide good stability during redox cycling.
AB - Sr(Ti0.3Fe0.7)O3-δ (STF) and the associated exsolution electrodes Sr0.95(Ti0.3Fe0.63Ru0.07)O3-δ (STFR), or Sr0.95(Ti0.3Fe0.63Ni0.07)O3-δ (STFN) are alternatives to Ni-based cermet fuel electrodes for solid oxide electrochemical cells (SOCs). They can provide improved tolerance to redox cycling and fuel impurities, and may allow direct operation with hydrocarbon fuels. However, such perovskite-oxide-based electrodes present processing challenges for co-sintering with thin electrolytes to make fuel electrode supported SOCs. Thus, they have been mostly limited to electrolyte-supported SOCs. Here, we report the first example of the application of perovskite oxide fuel electrodes in novel oxygen electrode supported SOCs (OESCs) with thin YSZ electrolytes, and demonstrate their excellent performance. The OESCs have La0.8Sr0.2MnO3-δ-Zr0.92Y0.16O2-δ (LSM-YSZ) oxygen electrode-supports that are enhanced via infiltration of SrTi0.3Fe0.6Co0.1O3-δ, while the fuel electrodes are either Ni-YSZ, STF, STFN, or STFR. Fuel cell power density as high as 1.12 W cm-2 is obtained at 0.7 V and 800 °C in humidified hydrogen and air with the STFR electrode, 60% higher than the same cell made with a Ni-YSZ electrode. Electrolysis current density as high as -1.72 A cm-2 is obtained at 1.3 V and 800 °C in 50% H2O to 50% H2 mode; the STFR cell yields a value 72% higher than the same cell made with a Ni-YSZ electrode, and competitive with the widely used conventional Ni-YSZ-supported cells. The high performance is due in part to the low resistance of the thin YSZ electrolyte, and also to the low fuel electrode polarization resistance, which decreases with fuel electrode in the order: Ni-YSZ > STF > STFN > STFR. The high performance of the latter two electrodes is due to exsolution of catalytic metal nanoparticles; the results are discussed in terms of the microstructure and properties of each electrode material, and surface oxygen exchange resistance values are obtained over a range of conditions for STF, STFN, and STFN. The STF fuel electrodes also provide good stability during redox cycling.
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U2 - 10.1039/d0ta06678h
DO - 10.1039/d0ta06678h
M3 - Article
AN - SCOPUS:85098165835
SN - 2050-7488
VL - 8
SP - 25867
EP - 25879
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 48
ER -
