镓酸镧基薄膜电解质对称电池的可控构建及优化

This project explores the integration symmetrical SOFC of the LSGM film electrolyte, optimizes the electrode structure, and investigates the anode and cathode electrochemical reaction principle.Mutual correlation between the stability of lattice structure 、conductivity and chemical composition of the electrode materials is studied.Specific work bases on the cathode material of the perovskite structure Sm0.5Sr0.5CoO3-δ (SSC), through replacing cobalt ions with iron ions, chromium ions, molybdenum ions and vanadium ions in the B position (partial or complete replacement), to improve the stability of the structure of the material under strongly reducing atmosphere, and investigate the charge transport behavior;Based on LSGM-integrated substrate, the film of liquid immersion plating electrode is deposited in the wall of the hole of the layer of porous LSGM, to achieve the symmetric electrode nanostructure controllable build, and study their interfacial polarization behavior under an atmosphere of hydrogen gas and air,and assess their catalytic activity of hydrogen electrochemical oxidation reaction and oxygen electrochemical reduction reaction; The discharge behavior of the symmetrical SOFC based on the LSGM-integrted substrate is researched in a fuel such as hydrogen, natural gas, propane, gasoline, and the oxidation - reduction reversibility of semmetric electrode film and long-term stability of the discharge performance is investigated.

本项目探索开发LSGM薄膜电解质一体化对称电池，优化其电极结构，探讨其阴阳极反应过程的电化学原理。研究对称电极材料晶格结构稳定性和电导率与化学成分之间的相互关联，具体工作将以钙钛矿结构的Sm0.5Sr0.5CoO3-δ（SSC）阴极材料为基础，通过在Ｂ位置上以铁离子、铬离子、钼离子和钒离子单独或者共同置换钴离子（部分或者完全置换），提高该材料在强还原性气氛下的结构稳定性，并考察其荷电输运行为；在LSGM 一体化基体上，利用液相浸渍镀膜技术在多孔LSGM 层的孔内壁上沉积电极薄膜，实现对称电极的纳米结构可控构筑，并研究其在氢气和空气气氛下的界面极化行为，评估其对氢气电化学氧化反应和氧气电化学还原反应的催化活性；研究LSGM薄膜电解质一体化对称电池在氢气、天然气、丙烷、汽油等燃料下的放电行为，考察对称电极薄膜的氧化－还原可逆性以及放电性能的长期稳定性。

本项目探索开发LSGM薄膜电解质一体化对称电池，优化其电极结构，探讨其阴阳极反应过程的电化学原理。研究对称电极材料晶格结构稳定性和电导率与化学成分之间的相互关联，具体工作将以钙钛矿结构的Sm0.5Sr0.5CoO3-δ（SSC）阴极材料为基础，通过在Ｂ位置上以铁离子、铬离子、钼离子和钒离子单独或者共同置换钴离子（部分或者完全置换），提高该材料在强还原性气氛下的结构稳定性，并考察其荷电输运行为；在LSGM 一体化基体上，利用液相浸渍镀膜技术在多孔LSGM 层的孔内壁上沉积电极薄膜，实现对称电极的纳米结构可控构筑，并研究其在氢气和空气气氛下的界面极化行为，评估其对氢气电化学氧化反应和氧气电化学还原反应的催化活性；研究LSGM薄膜电解质一体化对称电池在氢气、天然气、丙烷、汽油等燃料下的放电行为，考察对称电极薄膜的氧化－还原可逆性以及放电性能的长期稳定性。