Cation conductivity in dried poly(4-styrene sulfonate) poly(diallydimethylammonium chloride) based polyelectrolyte complexes

被引：9

作者：

Bhide, Amrtha ^{[1
]}

Schoenhoff, Monika ^{[1
]}

Cramer, Cornelia ^{[1
]}

机构：

[1] Univ Munster, Inst Phys Chem, D-48149 Munster, Germany

来源：

SOLID STATE IONICS | 2012年 / 214卷

关键词：

Polyelectrolyte; Ionic conductivity; Activation enthalpy; Energy materials; BY-LAYER FILM; POLYMER ELECTROLYTES; POLYSILOXANE; MULTILAYERS; TRANSPORT; MEMBRANES; IONS; SALT;

D O I：

10.1016/j.ssi.2012.03.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polyelectrolyte complexes (PEC) are formed by ionic cross-linking of poly(4-styrene sulfonate) (PSS) and poly(diallydimethyl ammonium chloride) (PDADMAC) and subsequent removal of excess salt by dialysis. This systematic study provides temperature-dependent conductivity and other transport properties of dried PEC of type x PSS (Li, Na or Cs) center dot (1-x) PDADMAC with molar fractions x ranging from 0.4 to 0.6. In this way, the remaining counterions are either alkali cations or chloride anions with a number density determined by the composition, x. Conductivity and activation enthalpy values show that in all cases the alkali cations dominate the conductivity, even in anion-rich PEC. With increasing size of the alkali cation the conductivity values decrease, while the activation enthalpy values increase. Ion size thus is a parameter controlling the charge carrier mobility. In addition, the cation mobility is strongly dependent on cation concentration. The mobility of the anions is negligible, thus dried PEC are predominantly cation-conducting materials, irrespective of their composition. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：13 / 18

页数：6

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