Nickel-Regulated Composite Cathode with Balanced Triple Conductivity for Proton-Conducting Solid Oxide Fuel Cells,Advanced Science

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Nickel-Regulated Composite Cathode with Balanced Triple Conductivity for Proton-Conducting Solid Oxide Fuel Cells
Advanced Science ( IF 14.3 ) Pub Date : 2023-10-28 , DOI: 10.1002/advs.202304555
Hua Tong ₁ , Wenjing Hu ₁ , Min Fu ₁ , Chunli Yang ₂ , Zetian Tao ₁

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Proton-conducting solid oxide fuel cells (H-SOFCs) have the potential to be a promising technology for energy conversion and storage. To achieve high chemical compatibility and catalytic activity, nickel-doped barium ferrate with triple conducting ability is developed as cathodes for H-SOFCs, presenting an impressive electrochemical performance at intermediate temperatures. The cell performance with the optimized BaCe_0.26Ni_0.1Fe_0.64O₃–_δ (BCNF10) composite cathode reaches an outstanding performance of 1.04 W cm⁻² at 600 °C. The high electrocatalytic capacity of the nickel-doped barium ferrate cathode can be attributed to its significant proton conductivity which is confirmed through hydrogen permeation experiments. Density functional theory (DFT) calculations are further conducted to reveal that the presence of nickel can enhance processes of hydration formation and proton migration, leading to improve proton conductivity and electro-catalytic activity.

中文翻译：

用于质子传导固体氧化物燃料电池的具有平衡三重电导率的镍调节复合阴极

质子传导固体氧化物燃料电池（H-SOFC）有潜力成为一种有前途的能量转换和存储技术。为了实现高化学兼容性和催化活性，开发了具有三重导电能力的镍掺杂铁酸钡作为 H-SOFC 的阴极，在中间温度下呈现出令人印象深刻的电化学性能。采用优化的BaCe _0.26 Ni _0.1 Fe _0.64 O ₃ – _δ (BCNF10)复合阴极的电池性能在600 °C时达到1.04 W cm ^-2的优异性能。镍掺杂铁酸钡阴极的高电催化能力可归因于其显着的质子传导性，这一点通过氢渗透实验得到证实。进一步进行密度泛函理论（DFT）计算表明，镍的存在可以增强水合形成和质子迁移过程，从而提高质子传导性和电催化活性。

更新日期：2023-10-28

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