Nano-Ceramic Cathodes via Co-sputtering of Gd–Ce Alloy and Lanthanum Strontium Cobaltite for Low-Temperature Thin-Film Solid Oxide Fuel Cells,ACS Applied Energy Materials

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Nano-Ceramic Cathodes via Co-sputtering of Gd–Ce Alloy and Lanthanum Strontium Cobaltite for Low-Temperature Thin-Film Solid Oxide Fuel Cells
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-09-09 , DOI: 10.1021/acsaem.0c01147
Haowen Ren _{1,

2} , Yoon Ho Lee _{3,

4} , Erik A. Wu ₅ , Hyeseung Chung ₅ , Ying Shirley Meng _{2,

5,

6} , Eric E. Fullerton _{1,

2,

5,

6,

7} , Nguyen Q. Minh ₃

Affiliation

We report the electrochemical performance and structural characteristics of porous nanostructured ceramic cathodes for thin-film solid oxide fuel cells (TF-SOFCs) based on yttria-stabilized zirconia (YSZ) electrolytes. The nanostructured cathode is obtained through magnetron co-sputtering of gadolinium–cerium (Gd–Ce) alloy and lanthanum strontium cobaltite perovskite targets. The resultant nanostructure and composition of the ceramic cathode are controlled by adjusting the co-sputtering conditions. The peak power densities in our fabricated TF-SOFCs are the highest reported values for YSZ-based electrolyte SOFCs, showing 0.14, 0.48, 1.21, 2.56, and 3.01 W/cm² at 450, 500, 550, 600, and 650 °C, respectively, operating under air and pure hydrogen fuel. The results show that the porosity and composition of the cathode greatly affect the resulting peak power densities. This work illustrates the capability of sputtering to produce stable, scalable, nano-ceramic cathodes with superb peak power densities when integrated in TF-SOFCs.

中文翻译：

通过共溅射Gd-Ce合金和镧锶钴铁矿制备的纳米陶瓷阴极，用于低温薄膜固体氧化物燃料电池

我们报告了基于氧化钇稳定的氧化锆（YSZ）电解质的薄膜固体氧化物燃料电池（TF-SOFC）的多孔纳米结构陶瓷阴极的电化学性能和结构特征。通过magnet-铈（Gd-Ce）合金和镧锶钴钴矿钙钛矿靶的磁控共溅射获得了纳米结构阴极。陶瓷阴极的最终纳米结构和组成可通过调节共溅射条件来控制。我们制造的TF-SOFC中的峰值功率密度是基于YSZ的电解质SOFC的最高报告值，显示为0.14、0.48、1.21、2.56和3.01 W / cm ^2。分别在450、500、550、600和650°C下在空气和纯氢燃料下运行。结果表明，阴极的孔隙率和组成极大地影响了产生的峰值功率密度。这项工作说明了将溅射技术集成到TF-SOFC中后，能够产生具有极高峰值功率密度的稳定，可扩展的纳米陶瓷阴极的能力。

更新日期：2020-09-28

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