Hydration of the H+, Li+, Na+, and Cs+ ions in MF-4SK perfluorinated sulfonic acid cation-exchange membranes modified with inorganic dopants

被引：2
|
作者：
Safronova, E. Yu. [1 ]
Volkov, V. I. [2 ]
Pavlov, A. A. [2 ]
Chernyak, A. V. [2 ]
Volkov, E. V. [2 ]
Yaroslavtsev, A. B. [1 ]
机构：
[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia
[2] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka 142432, Moscow Oblast, Russia
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2011年 / 56卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
TRANSPORT-PROPERTIES; ALKALI-METALS; DIFFUSION; SILICA; NA-23; LI-7;
D O I：
10.1134/S0036023611020240
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The hydration, state, and mobility of protons and Li+, Na+, and Cs+ ions in MF-4SK perfluorinated sulfonic acid cation-exchange membranes doped with silicon dioxide and phosphotungstic acid have been investigated by NMR and impedance spectroscopy. The dopants increase the moisture content of the membrane and change the system of pores and channels in which ion transport takes place. At low humidities, the dopant particles are involved in ion transport. The greatest effect is observed for the membranes doped with both SiO2 and phosphotungstic acid. The water molecules sorbed by dopant particles as a material participate in the hydration of alkali metal cations in the membrane.
引用
收藏
页码：156 / 162
页数：7
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