膜科学与技术

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Study on conductivity of ion exchange membranes with AC impedance method

Authors： Fang Yongsheng，Chen Xiao, Wang Baoguo

Units： Department of Chemical Engineering, Tsinghua University

KeyWords： membrane area resistance; ion exchange membrane; AC impedance

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2011,31(2):14-18

Abstract：

Using AC impedance measurement, this study proposed a method to investigate ion exchange membrane area resistances; a two-polar cell holds membrane immersed in electrolyte solution, area resistance was determined by the difference of electricity resistance measured with or without a membrane. The error can be minimized by using a parallel electricity resistance. This method was proofed reliable and effective by measuring area resistances of a cation or an anion exchange membranes in electrolyte solution, including aqueous sulfuric acid, sodium chloride, and the real electrolyte used in vanadium redox flow battery(VRB). The measured results revealed the various adsorption behaviors of cation and anion exchange membranes, and showed membrane area resistance dependence upon electrolyte solution concentration. This study will facilitate the development of ion exchange membranes and its application in renewable energy technology.

Funds：

国家自然科学基金(20876086)；国家“863”课题(2007AA05Z245)；国家重点基础研究发展计划(973计划)项目(2010CB227202)

AuthorIntro：

范永生(1980-)，男，河南人，清华大学硕士生。通讯联系人：王保国，E-mail：bgwang@tsinghua.edu.cn

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