Anion Doping: A New Strategy for Developing High‐Performance Perovskite‐Type Cathode Materials of Solid Oxide Fuel Cells,Advanced Energy Materials

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Anion Doping: A New Strategy for Developing High‐Performance Perovskite‐Type Cathode Materials of Solid Oxide Fuel Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2017-05-16 , DOI: 10.1002/aenm.201700242
Zhenbao Zhang ₁ , Yinlong Zhu ₁ , Yijun Zhong ₁ , Wei Zhou ₁ , Zongping Shao _{2,

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Affiliation

Overcoming the sluggish activity of cathode materials is critical to realizing the wide‐spread application of intermediate‐temperature solid oxide fuel cells. Herein, a new way is reported to tune the performance of perovskite‐type materials as oxygen reduction electrodes by embedding anions (F⁻) in oxygen sites. The obtained perovskite oxyfluorides SrFeO₃₋_σ₋_δF_σ and SrFe_0.9Ti_0.1O₃₋_σ₋_δF_σ (σ = 0.05 and 0.10) show improved electrocatalytic activity compared to their parent oxides, achieving area specific resistance values of 0.875, 0.393, and 0.491 Ω cm² for SrFeO₃₋_δ, SrFeO_2.95−_δF_0.05, and SrFeO_2.90−_δF_0.10, respectively, at 600 °C in air. Such improved performance is a result of the improved bulk diffusion and surface exchange properties due to anion doping. Moreover, favorable stability in performance is also demonstrated for the F⁻ anion‐doped perovskites as oxygen reduction electrodes at 650 °C for a test period of ≈200 h. A combination of anion doping and cation doping may provide a highly attractive strategy for the future development of cathode materials.

中文翻译：

阴离子掺杂：开发固体氧化物燃料电池高性能钙钛矿型阴极材料的新策略

克服阴极材料的缓慢活性对于实现中温固体氧化物燃料电池的广泛应用至关重要。在本文中，一种新的方式通过嵌入阴离子（F报告给曲调的钙钛矿型材料如氧还原电极中的性能^-在氧位点）。将所得到的钙钛矿型氟氧化物SrFeO _3-_σ_-_δ ˚F _σ和SRFE _0.9的Ti _0.1 ø _3-_σ_-_δ ˚F _σ（σ= 0.05和0.10）相比显示出它们的父氧化物改善的电催化活性，实现0.875面积比电阻值， 0.393和0.491Ωcm ²对于SrFeO _3-_δ，SrFeO _2.95-_δ ˚F _0.05，和SrFeO _2.90-_δ ˚F _0.10分别，在空气中于600℃。这种改善的性能是由于阴离子掺杂而改善的本体扩散和表面交换性能的结果。此外，在性能良好的稳定性也显示出为F ^-在650℃下的≈200h的测试期间掺杂阴离子的钙钛矿作为氧还原电极。阴离子掺杂和阳离子掺杂的结合可以为阴极材料的未来发展提供极具吸引力的策略。

更新日期：2017-05-16

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