Cation coordination in ion-conducting gels based on PEO-grafted polymers

被引：24

作者：

Adebahr, J ^{[1
]}

Gavelin, P

Jannasch, P

Ostrovskii, D

Wesslen, B

Jacobsson, P

机构：

[1] Chalmers Univ Technol, Dept Expt Phys, SE-41296 Gothenburg, Sweden

[2] Univ Lund, SE-22100 Lund, Sweden

来源：

SOLID STATE IONICS | 2000年 / 135卷 / 1-4期

关键词：

polymer gel electrolyte; ionic interaction; Raman spectroscopy; infrared spectroscopy;

D O I：

10.1016/S0167-2738(00)00294-0

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：

Ionic conducting polymer gels prepared from PEG-grafted acrylates, ethylene carbonate (EC), dimethyl carbonate (DMC), and LiPF6 are studied by means of infrared and Raman spectroscopy. It is found that the presence of grafted PEO chains substantially changes the coordination of lithium cations from 'cation-solvent' to 'cation-polymer'. Spectroscopic studies show that Li+-PEO coordination is strongly favored in competition with the solvent molecules and dominates completely at ether oxygen to Li-cation ratios (O:Li) of 10:1 and 5:1. At an O:M of 4:1 a solvent-cation interaction arises, in agreement with previously reported MD calculations of a preferred coordination number of 5 in similar systems. The results suggest that the complex interactions which determine long time stability and ionic transport properties can be designed by functionalization of the polymer backbone in PMMA-based gel electrolytes. O 2000 Elsevier Science B.V. All rights reserved.

引用

页码：149 / 154

页数：6

共 20 条

[1] Raman study on intermolecular and ionic interactions in gel electrolytes [J].

Adebahr, J ;

Gavelin, P ;

Ostrovskii, D ;

Torell, LM ;

Wesslen, B .

JOURNAL OF MOLECULAR STRUCTURE, 1999, 482 :487-490

[2] Raman Study of Ion-Molecules Interaction in Poly(Methylmetacrylate)-Based Gel Electrolytes [J].

Cazzanelli, E. ;

Mariotto, G. ;

Appetecchi, G. B. ;

Croce, F. .

IONICS, 1996, 2 (02) :81-87

[3] Li+ solvation in ethylene carbonate-propylene carbonate concentrated solutions: A comprehensive model [J].

Cazzanelli, E ;

Croce, F ;

Appetecchi, GB ;

Benevelli, F ;

Mustarelli, P .

JOURNAL OF CHEMICAL PHYSICS, 1997, 107 (15) :5740-5747

[4] Characterization of some polyacrylonitrile-based electrolytes [J].

Choe, HS ;

Carroll, BG ;

Pasquariello, DM ;

Abraham, KM .

CHEMISTRY OF MATERIALS, 1997, 9 (01) :369-379

[5] MOLECULAR RELAXATION OF LIASF6 IN 1,2-DIMETHOXYETHANE [J].

FARBER, H ;

IRISH, DE ;

PETRUCCI, S .

JOURNAL OF PHYSICAL CHEMISTRY, 1983, 87 (18) :3515-3520

[6] INFRARED AND RAMAN SPECTRA AND VIBRATIONAL ASSIGNMENT OF ETHYLENE CARBONATE [J].

FORTUNATO, B ;

MIRONE, P ;

FINI, G .

SPECTROCHIMICA ACTA PART A-MOLECULAR SPECTROSCOPY, 1971, A 27 (09) :1917-+

[7] CONFORMATIONAL-CHANGES IN DIETHYLENE GLYCOL DIMETHYL ETHER AND POLY(ETHYLENE OXIDE) INDUCED BY LITHIUM ION COMPLEXATION [J].

FRECH, R ;

HUANG, WW .

MACROMOLECULES, 1995, 28 (04) :1246-1251

[8]

GAVELIN P, IN PRESS

[9]

Gray F.M., 1991, SOLID POLYM ELECTROL

[10] Modelling amorphous lithium salt-PEO polymer electrolytes: ab initio calculations of lithium ion-tetra-, penta- and hexaglyme complexes [J].

Johansson, P ;

Tegenfeldt, J ;

Lindgren, J .

POLYMER, 1999, 40 (15) :4399-4406

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