WCU Hybrid Materials Program, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea.
Phys Chem Chem Phys. 2010 Oct 28;12(40):12951-5. doi: 10.1039/c0cp00722f. Epub 2010 Aug 23.
A variety of electrochemical applications of mixed ionic-electronic conductor compounds hinge on their variety of mass and charge transport properties, e.g., ionic conductivity, electronic conductivity, conductivity with suppressed transfer of either electrons or ions, chemical diffusivity, and permeability. All these transport properties of a compound may be represented completely by an Onsager transport coefficient matrix. Here we introduce a simple electrochemical method to measure all the Onsager coefficients for a mixed conductor oxide with known nonstoichiometry (δ), apply it to construct the Onsager matrix for the system of La(2)NiO(4+δ), and derive thereby its transport properties to compare with the literature values available.
各种混合离子-电子导体化合物的电化学应用都取决于其多种质量和电荷输运性质，例如离子电导率、电子电导率、抑制电子或离子迁移的电导率、化学扩散率和渗透率。一个化合物的所有这些输运性质都可以用一个 Onsager 输运系数矩阵完全表示。在这里，我们引入了一种简单的电化学方法来测量具有已知非化学计量比 (δ) 的混合导体氧化物的所有 Onsager 系数，应用它来构建 La(2)NiO(4+δ)体系的 Onsager 矩阵，并由此得出其输运性质与现有文献值进行比较。
