离子液体([C_(6)MIm][TFSI])从体相电迁移至水相研究  

Electromigration of [C_(6)MIm] [TFSI]from Ionic Liquids Bulk to Aqueous Solutions

作　　者：王明勇 孙进贺[1,2] 张鹏瑞 黄超驰 张茜 邵斐 景燕[1,2] 贾永忠 WANG Ming-yong;SUN Jin-he;ZHANG Peng-rui;HUANG Chao-chi;ZHANG Qian;SHAO Fei;JING Yan;JIA Yong-zhong(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources,Xining,810008,China;University of Chinese Academy of Sciences,Beijing,100049,China)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖资源综合利用工程技术中心,青海西宁810008 [3]中国科学院大学,北京100049

出　　处：《盐湖研究》2021年第2期35-43,共9页Journal of Salt Lake Research

基　　金：Key R&D Program of Qinghai Province(No. 2021-GX-104);Youth Innovation Promotion Association of CAS(2015351)

摘　　要：离子在离子液体/水溶液二元系统中的电迁移行为在很多领域受到了越来越多的关注。本文通过研究不同条件下离子液体离子在电极液中的浓度变化,系统地研究了电极溶液酸—碱度,电极溶液中电解质浓度以及离子液体中溶解LiN(CF_(3) SO_(2))2与否对[C_(6)MIm]+离子电迁移的影响。总的来说,随着电流的增加,[C_(6)MIm]+离子向阴极水溶液的迁移量随之增加,向阳极水溶液的迁移量随之减少;然而N(CF_(3) SO_(2))2-离子向阳极水溶液的迁移量随之增加,向阴极水溶液的迁移量随之减少。当电极溶液为碱性,[C_(6)MIm]+离子的迁移量明显减少。在电极溶液中溶入LiN(CF_(3) SO_(2))2时或者将LiN(CF_(3) SO_(2))2溶入离子液体时,[C_(6)MIm]+离子的迁移量也明显受到抑制。The ions electromigration of ionic liquids(ILs)/aqueous solution binary system have attracted increasingly attention in many fields.In this work,the effect of acidity-alkalinity,electrolyte concentration of electrode solutions and ILs with LiN(CF_(3) SO_(2))2 on the migration of[C_(6)MIm]+ions was investigated systematically by studying the concentration change of ions of ILs in the electrode solutions.Generally,the concentration of[C_(6)MIm]+ions increased in cathode solution and decreased in anode solution with increasing current,while the concentration of N(CF_(3) SO_(2))-2 ions increased in anode solution and decreased in cathode solution.When basic solution was used as electrode solution,the migration of[C_(6)MIm]+ions was restrained markedly.LiN(CF_(3) SO_(2))2 solution was used as electrode solution and the dissolution of LiN(CF_(3) SO_(2))2 in ILs could reduce the migration of[C_(6)MIm]+ions effectively.

关 键 词：离子液体 电迁移 电极水溶液 回溶 

分 类 号：O645.17[理学—物理化学]