NMR study of photo-crosslinked solid polymer electrolytes: The influence of monofunctional oligoethers

被引：14

作者：

Chiappone, Annalisa ^{[1
]}

Jeremias, Sebastian ^{[2
]}

Bongiovanni, Roberta ^{[1
]}

Schoenhoff, Monika ^{[2
]}

机构：

[1] DISAT Politecn Torino, I-10129 Turin, Italy

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

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2013年 / 51卷 / 21期

关键词：

crosslinking density; electrochemistry; ionic motion; NMR; photopolymerization; polymer electrolytes; pulsed field gradient (PFG); IONIC-CONDUCTIVITY; LITHIUM ION; RELAXATION; DIFFUSION; BATTERIES; TRANSPORT; DYNAMICS; COORDINATION; MECHANISMS; CHALLENGES;

D O I：

10.1002/polb.23371

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Solid polymer electrolytes for Lithium batteries applications are commonly prepared by dissolving a lithium salt in poly(ethylene oxide) (PEO)-based materials. Their performance is strongly related to the structure of the polymer network. In this article, a new salt-in-polymer electrolyte prepared by the fast and easy radical photopolymerization of PEO acrylate oligomers is studied. Here, a difunctional monomer used as the polymer backbone is copolymerized with monofunctional monomers of different length and concentration. Thus, the crosslinking density and conductivity are changed. These systems are investigated by a detailed NMR study yielding local dynamics and mass transport by temperature-dependent spin-lattice relaxation time and PFG-NMR diffusion measurements for different nuclei (7Li and 19F). The results indicate that a sufficiently long monofunctional oligoether improves the properties, since it provides a lower crosslinking density as well as more coordinating oxygens for the Li ions. (c) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 1571-1580

引用

页码：1571 / 1580

页数：10

共 42 条

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