期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 29, 页码 25996-26004出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b07749
关键词
solid oxide electrolysis cell; hydrogen; infiltration; durability; hydrogen evolution reaction; oxygen evolution reaction
资金
- Danish TSO - Energinet.dk through the project Towards Solid Oxide Electrolysis Plants in 2020 (ForskEL) [2015-1-12276]
- EUDP through the project Efficient Power2Gas Combining SOEC and Biomass Gasification (EUDP) [64017-0011]
- China Scholarship Council [201604910912]
Despite various advantages of high-temperature solid oxide electrolysis cells (SOECs) over their low-temperature competitors, the insufficient long-term durability has prevented the commercialization of SOECs. Here, we address this challenge by employing two nanoengineered electrodes. The 02 electrode consists of a La0.6Sro,Co03_6 (LSC) and Gd,Pr-co-doped CeO2 (CGPO) nanocomposite coating deposited on a Gd-doped CeO2 (CGO) scaffold, and the H2 electrode comprises a Ni/yttria stabilized zirconia (YSZ) electrode modified with a nanogranular CGO coating. The resulting cell with an active area of 4 x 4 cm2 exhibits a current density exceeding 1.2 A cm-2 at 1.3 V and 750 C for steam electrolysis while also offering excellent long-term durability at 1 A cm-2 with a high steam-to-hydrogen conversion of-66%. We further unravel the degradation mechanism of the most commonly used Ni/YSZ electrode under these conditions and describe the mitigation of the discussed mechanism on our nanoengineered electrode. Our findings demonstrate the potential of designing robust SOECs by nanoengineering electrodes through infiltration and have significant implications for the practical integration of SOEC technology in the future sustainable energy system.
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