多相高分子快离子导体阻抗谱的研究

A STUDY ON IMPEDANCE SPECTRA OF MULTI-PHASE POLYMERIC ELECTROLYTES

研究了以ＬｉＣｌＯ４掺杂的聚乙二醇聚氨酯双离子导体及磺酸型聚乙二醇聚氨酯离聚物单一离子导体的阻抗谱，给出了多相快离子导体交流阻抗测试系统的等效电路．通过阻抗谱计算机解析，计算得出了样品的基本电学参数．通过讨论界面阻抗的色散现象，计算出样品的离子电导率，和阻抗谱解析法得到的结果相一致．

he impedance spectra of two systems of multi -phase polymeric electrolyte were studied' One system consisted of LiClO4 doping polyethylene glycol polyurethane which was characterized by bi -ionic conductor and the another system was based ona sulfonated polyurethane ionomer with single-ion transportation character. An equivalent circuit of alternating impedance measurement system for the multi-phasepolymeric electrolytes was proposed. The ionic conductivity and other fundamentalelectricity parameters were respectively calculated by resolving of impedance spectrawith computer fitting analysis and of the dispersion relations of boundary impedance.Based on the two methods the calculated ionic conductivities came to an unanimousconclusion in spite of the difference in transport numbers of canon of the two samples. The impedance spectra of the different samples can be interpreted with the eqinvalent circuit suggested by the present paper.