High-Performance Proton-Conducting Fuel Cell with B-Site-Deficient Perovskites for All Cell Components,Energy & Fuels

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High-Performance Proton-Conducting Fuel Cell with B-Site-Deficient Perovskites for All Cell Components
Energy & Fuels ( IF 5.2 ) Pub Date : 2020-08-04 , DOI: 10.1021/acs.energyfuels.0c02370
Fan He ₁ , Mingzhuang Liang ₁ , Wei Wang ₁ , Ran Ran ₁ , Guangming Yang ₁ , Wei Zhou ₁ , Zongping Shao _{1,

2}

Affiliation

Proton-conducting fuel cells (PCFCs) with a perovskite-type proton-conducting electrolyte show many advantages over conventional oxygen-ion-conducting ceramic fuel cells. Both electrode catalytic activity and electrolyte conductivity determine the performance of PCFCs. Cation non-stoichiometry has a great influence on the catalytic activity and conductivity of perovskite oxides. Here, we propose a PCFC with B-site-cation-deficient perovskites (BCDPs) for all cell components, including cathode, electrolyte, and anode. More specifically, a cell with Ba(Co_0.4Fe_0.4Zr_0.1Y_0.1)_0.95O_3−δ (BCFZY-0.95) cathode, Ba(Zr_0.1Ce_0.7Y_0.1Yb_0.1)_0.95O_3−δ (BZCYYb-0.95) electrolyte, and Ni–BZCYYb-0.95 anode is fabricated and tested for power generation. Electrochemical impedance spectroscopy in combination with the distribution of relaxation times verify the superior oxygen reduction reaction activity of the BCFZY-0.95 cathode compared to BaCo_0.4Fe_0.4Zr_0.1Y_0.1O_3−δ and higher proton conductivity of BZCYYb-0.95 than BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3−δ. At 650 °C, a BCDP cell with a thin-film electrolyte shows a high-power density of 840 mW cm^–2. The cell is stably operated within the test period of 400 h of stability at 550 °C.

中文翻译：

高性能质子传导性燃料电池，适用于所有电池组件的B-Site缺乏钙钛矿

具有钙钛矿型质子传导电解质的质子传导燃料电池（PCFC）优于常规的含氧离子传导陶瓷燃料电池。电极催化活性和电解质电导率都决定了PCFC的性能。阳离子非化学计量对钙钛矿氧化物的催化活性和电导率有很大影响。在这里，我们为所有电池组件（包括阴极，电解质和阳极）提出了一种具有B位阳离子不足的钙钛矿（BCDP）的PCFC。更具体地，具有Ba（Co _0.4 Fe _0.4 Zr _0.1 Y _0.1）_0.95 O _3-δ（BCFZY-0.95）阴极，Ba（Zr _0.1 Ce _0.7 Y _0.1制备Yb _0.1）_0.95 O3 _-δ（BZCYYb-0.95）电解质和Ni-BZCYYb-0.95阳极并进行发电测试。电化学阻抗谱结合弛豫时间的分布证明了BCFZY-0.95阴极的氧化还原反应活性优于BaCo _0.4 Fe _0.4 Zr _0.1 Y _0.1 O3 _-δ，并且BZCYYb-0.95的质子传导率高于BaZr _0.1 Ce _0.7 ÿ _0.1的Yb _0.1 ø _3-δ。在650°C时，带有薄膜电解质的BCDP电池显示出840 mW cm的高功率密度^–2。该电池可在550°C的400 h稳定性测试期内稳定运行。

更新日期：2020-09-18

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