A ceramic material, Sm_0.5Sr_0.5CoO₃, is used for both cathode and current collector, aiming to lower the interface barrier. The current collector is prepared by phase inversion combined with laser scanning technique to obtain a novel microstructure featured by highly oriented finger-like pores inside and an array of hump-like tips on surface. The pores and surface two-dimensional trench network serve as micro-channels for gas transport, while the hump-like micro-points function as current collecting tips. The mean distance between the adjacent tips is about 50 μm, which significantly decreases the migration distance of electrons. The polarization resistance of symmetrical cell with the as-prepared current collector is only 20% of that with Ag collector, and the corresponding value in single cell decreases about 40% at 800 °C. The underlying mechanism for the impact of the ceramic current collector is discussed by revealing the correlation between the unique microstructure and the electrochemical performance.

陶瓷材料Sm _0.5 Sr _0.5 CoO ₃用于阴极和集电器，目的是降低界面势垒。通过相转化与激光扫描技术相结合来制备集电器，从而获得一种新颖的微观结构，其特征在于内部具有高度取向的手指状孔和表面上的一系列驼峰状尖端。孔和表面二维沟槽网络充当气体传输的微通道，而驼峰状的微点充当集流尖端。相邻尖端之间的平均距离约为50μm，这大大减小了电子的迁移距离。制备好的电流收集器的对称电池的极化电阻仅为Ag收集器的极化电阻的20％，而在800°C时，单电池的相应电阻值降低了约40％。