Sr-doped LaMnO₃, as one of the most successful cathodes for solid oxide fuel cells (SOFCs), can effectively function at high temperatures. However, its cathode kinetics considerably decreases with decreasing temperature, rendering it unsuitable for SOFCs operating at intermediate temperatures. In this study, La_0.5Sr_0.5MnO_3−δ(LSM) is coated with TiO₂ to create the LSM + TiO₂ cathode. TiO₂ is shown to modify the electronic structure at the LSM/TiO₂ interface, allowing for charge accumulation for the O atoms at the interface. The activated O atoms enhance the formation of oxygen vacancies, which benefit the oxygen diffusion ability. Using LSM + TiO₂ as a cathode for proton-conducting SOFCs (H-SOFCs) operating at intermediate temperatures, the corresponding fuel cell demonstrated enhanced cell output performance compared with cells employing solely LSM or TiO₂ cathodes, exhibiting the synergistic effect of combining LSM and TiO₂. Additionally, the LSM + TiO₂ cells achieved a power output of 1118 mWcm⁻² at 700°C, the highest yet reported value for H-SOFCs with LSM cathodes. LSM + TiO₂ was demonstrated to be stable against CO₂ and steam, allowing for steady functioning of the cell under working conditions, thereby resolving the problem of LSM’s poor performance in H-SOFCs while retaining remarkable stability.

Sr掺杂的LaMnO ₃是固体氧化物燃料电池（SOFC）最成功的阴极之一，可以在高温下有效发挥作用。然而，其阴极动力学随着温度的降低而显着降低，使其不适合在中间温度下运行的 SOFC。在本研究中，La _0.5 Sr _0.5 MnO _{3− δ} (LSM) 涂覆有 TiO ₂以创建 LSM + TiO ₂阴极。TiO ₂被证明可以改变 LSM/TiO _{2的电子结构}界面，允许界面处 O 原子的电荷积累。活化的O原子增强了氧空位的形成，有利于氧扩散能力。使用LSM + TiO ₂作为中温质子传导SOFC（H-SOFC）的阴极，与单独使用LSM或TiO 2 阴极的电池相比，相应的燃料电池表现出增强的电池输出性能，表现出结合LSM的_协同效应和TiO ₂。此外，LSM + TiO _{2电池在700°C下实现了1118 mWcm} ^-2的功率输出，这是迄今为止报道的具有LSM阴极的H-SOFC的最高值。LSM + TiO ₂被证明对 CO 稳定₂和蒸汽，允许电池在工作条件下稳定运行，从而解决LSM在H-SOFC中性能不佳的问题，同时保持显着的稳定性。