Tantalum doped La0.6Sr0.4FeO3−δ electrodes for symmetrical proton conducting solid oxide fuel cells†

IF 3.4 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Reaction Chemistry & Engineering Pub Date : 2023-01-12 DOI:10.1039/D2RE00553K

Shujun Peng, Zongjie Yin and Jian Xue

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引用次数: 2

Abstract

Symmetrical solid oxide fuel cells (SSOFCs) possessing the same electrodes have attracted plenty of scientific interest for lots of advantages compared with conventional SOFCs with different anodes and cathodes. In this paper, a 10 mol% Ta doped perovskite-type oxide La_0.6Sr_0.4FeO_3?δ, named La_0.6Sr_0.4Fe_0.9Ta_0.1O_3?δ (LSFT), is studied as both an anode and cathode for proton conducting SOFCs (H-SOFCs) operated between 500 and 800 °C. LSFT is chemically compatible with a BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3?δ (BZCYYb) electrolyte, even co-sintering at 1000 °C for 10 h. The activating energy (E_a) of electrical conductivity for LSFT is only 0.44 eV. At 800 °C, the polarization resistances (R_ps) for LSFT barely reach 0.02 Ω cm² in air and 0.1 Ω cm² in H₂, and the corresponding E_a values are only 1.39 and 0.91 eV, respectively. The peak power density (PPD) of a symmetrical H-SOFC (SHSOFC) using LSFT electrodes is 0.697 W cm^?2 at 800 °C. Herein, LSFT should be a promising electrode for SHSOFCs.

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对称质子传导固体氧化物燃料电池中掺杂钽的La0.6Sr0.4FeO3−δ电极

具有相同电极的对称型固体氧化物燃料电池(SSOFCs)与采用不同阳极和阴极的传统固体氧化物燃料电池相比，具有许多优点，引起了科学界的广泛关注。本文采用10mol % Ta掺杂钙钛矿型氧化物La0.6Sr0.4FeO3?δ，命名为La0.6Sr0.4Fe0.9Ta0.1O3?δ (LSFT)作为质子导电SOFCs (H-SOFCs)的阳极和阴极，在500 ~ 800°C范围内进行了研究。LSFT与BaZr0.1Ce0.7Y0.1Yb0.1O3?δ (BZCYYb)电解质，在1000℃共烧结10 h, LSFT的电导率活化能(Ea)仅为0.44 eV。在800℃时，LSFT的极化电阻(Rps)在空气中仅为0.02 Ω cm2，在H2中仅为0.1 Ω cm2，对应的Ea值仅为1.39 eV和0.91 eV。使用LSFT电极的对称H-SOFC (SHSOFC)的峰值功率密度(PPD)为0.697 W cm?2在800°C。因此，LSFT应该是一种很有前途的shsofc电极。

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来源期刊

Reaction Chemistry & Engineering Chemistry-Chemistry (miscellaneous)

CiteScore

6.60

自引率

7.70%

发文量

227

期刊介绍： Reaction Chemistry & Engineering is a new journal reporting cutting edge research into all aspects of making molecules for the benefit of fundamental research, applied processes and wider society. From fundamental, molecular-level chemistry to large scale chemical production, Reaction Chemistry & Engineering brings together communities of chemists and chemical engineers working to ensure the crucial role of reaction chemistry in today’s world.