Single-ion polymer electrolytes based on a delocalized polyanion for lithium batteries

被引：299

作者：

Meziane, Rachid ^{[1
]}

Bonnet, Jean-Pierre ^{[1
]}

Courty, Matthieu ^{[1
]}

Djellab, Karim

Armand, Michel ^{[1
]}

机构：

[1] Univ Picardie Jules Verne, Lab Reactivite & Chim Solides UMR 6007, F-80039 Amiens, France

来源：

ELECTROCHIMICA ACTA | 2011年 / 57卷

关键词：

Single-ion polymer electrolyte; Lithium batteries; Ionic conductivity; POLY(ETHYLENE OXIDE); TRANSPORT-PROPERTIES; POLYPHOSPHAZENES; CHALLENGES; NMR; IR;

D O I：

10.1016/j.electacta.2011.03.074

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Lithium poly(4-styrenesulfonyl(trifluoromethylsulfonyl)imide) (PSTFSI) polyelectrolytes made up of -SO2-N--SO2-CF3 anionic groups associated with a lithium cation and attached to a polystyrene chain have been prepared. In these polymers the transference number of the lithium cation is expected to be unity while the ionic conductivity is kept high. Two different single-ion polymers with a similar final structure were synthesized by two ways, monomer free radical polymerization and polymer modification (PSTFSI (a) and PSTFSI (b), respectively). These polyelectrolytes were mixed with poly(ethylene oxide) PEO into a composite membrane to form solid electrolytes for lithium batteries. These polymer alloys were studied by scanning electron microscopy (SEM), thermal analysis and impedance spectroscopy to measure the ionic transport properties. Interestingly, ionic conductivity is about ten times higher for a membrane with PSTFSI (a) (approximate to 10(-5) S cm(-1)) compared to a membrane with lithium poly(styrene sulfonate) or with PSTFSI (b) above PEO melting temperature. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：14 / 19

页数：6

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