All-Sputtered, Superior Power Density Thin-Film Solid Oxide Fuel Cells with a Novel Nanofibrous Ceramic Cathode.,Nano Letters

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All-Sputtered, Superior Power Density Thin-Film Solid Oxide Fuel Cells with a Novel Nanofibrous Ceramic Cathode.
Nano Letters ( IF 9.6 ) Pub Date : 2020-03-26 , DOI: 10.1021/acs.nanolett.9b02344
Yoon Ho Lee _{1,

2} , Haowen Ren ₃ , Erik A Wu ₄ , Eric E Fullerton _{3,

4,

5,

6,

7} , Ying Shirley Meng _{4,

5,

6} , Nguyen Q Minh ₁

Affiliation

Thin film solid oxide fuel cells (TF-SOFCs) are attracting attention due to their ability to operate at comparatively lower temperatures (400-650 °C) that are unattainable for conventional anode-supported SOFCs (650-800 °C). However, limited cathode performance and cell scalability remain persistent issues. Here, we report a new approach of fabricating yttria-stabilized zirconia (YSZ)-based TF-SOFCs via a scalable magnetron sputtering process. Notable is the development and deposition of a porous La0.6Sr0.4Co0.2Fe0.8O2.95(LSCF)-based cathode with a unique fibrous nanostructure. This all-sputtered cell shows an open-circuit voltage of ∼1.0 V and peak power densities of ∼1.7 and ∼2.5 W/cm2 at 600 and 650 °C, respectively, under hydrogen fuel and air along with showing stable performance in short-term testing. The power densities obtained in this work are the highest among YSZ-based SOFCs at these low temperatures, which demonstrate the feasibility of fabricating exceptionally high-performance TF-SOFC cells with distinctive dense or porous nanostructures for each layer, as desired, by a sputtering process. This work illustrates a new, potentially low-cost, and scalable platform for the fabrication of next-generation TF-SOFCs with excellent power output and stability.

中文翻译：

具有新型纳米纤维陶瓷阴极的全溅射，超高功率密度薄膜固体氧化物燃料电池。

薄膜固体氧化物燃料电池（TF-SOFC）能够在相对较低的温度（400-650°C）下运行，这是常规阳极支撑的SOFC（650-800°C）无法实现的，因此备受关注。然而，有限的阴极性能和电池可扩展性仍然是持久的问题。在这里，我们报告通过可扩展的磁控溅射工艺制造基于氧化钇稳定的氧化锆（YSZ）的TF-SOFC的新方法。值得注意的是具有独特纤维纳米结构的多孔La0.6Sr0.4Co0.2Fe0.8O2.95（LSCF）基阴极的开发和沉积。这种全溅射电池在氢燃料和空气中在600和650°C下分别显示约1.0 V的开路电压和1.7和2.5 W / cm2的峰值功率密度，并在短时间内表现出稳定的性能。期限测试。在如此低的温度下，这项工作中获得的功率密度是基于YSZ的SOFC中最高的，这证明了通过溅射可以制造出每层具有独特的致密或多孔纳米结构的高性能TF-SOFC电池的可行性，处理。这项工作说明了用于制造具有出色功率输出和稳定性的下一代TF-SOFC的新型，潜在的低成本且可扩展的平台。

更新日期：2020-03-16

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