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一、引言离子选择膜的表观阻抗包括膜本体及膜与电极界面阻抗之和。从离子传输和对交流信号响应的观点出发,单晶膜属于均匀体系,具有单一电阻率和单一弛豫时问;多晶和复合高分予膜属非均匀体系,包含多个电阻率和多重阻抗弛豫时间,它们分别对应于多晶体的晶粒和晶界或高分子膜的活性物质和基质部分的阻抗分量;玻璃膜介于这二类体系之间,在
I. INTRODUCTION The apparent impedance of ion-selective membranes consists of the membrane bulk and the interface impedance of membrane and electrode. From the perspective of ion transport and response to AC signals, single crystal films are homogeneous and have a single resistivity and a single relaxation time; polycrystalline and composite films are heterogeneous and contain multiple resistivities and multiple Impedance relaxation time, which correspond to the polycrystalline grain and grain boundaries or polymer membrane active material and the matrix part of the impedance component; glass film between the two types of systems, in the