کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1297734 1498350 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ionic liquid based sodium ion conducting gel polymer electrolytes
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Ionic liquid based sodium ion conducting gel polymer electrolytes
چکیده انگلیسی

A novel thermally and electrochemically stable sodium ion conducting gel polymer electrolyte has been reported, which comprises a solution of NaCF3SO3 (sodium triflate or NaTf) in a room temperature ionic liquid 1-ethyl 3-methyl imidazolium trifluoro-methane sulfonate (EMI-triflate or EMITf) immobilized in poly (vinylidine fluoride-co-hexafluoropropylene) (PVdF-HFP). Different structural, thermal, electrical and electrochemical studies demonstrate promising characteristics of the polymer films, suitable as electrolytes in rechargeable sodium batteries. The possible conformational/structural changes in the polymer PVdF-HFP due to the entrapment of EMITf or EMITf/NaTf solution have been investigated by Fourier transform infra-red (FTIR), scanning electron microscopic (SEM) and X-ray diffraction (XRD) techniques. The electrolyte with the composition of EMITf:PVdF-HFP (4:1 w/w) + 0.5 M NaTf possesses excellent dimensional stability in the form of free standing thick film, which offers the ionic conductivity of 5.74 × 10−3 S cm−1 at room temperature (∼ 27 °C). The temperature dependence of electrical conductivity of polymer–ionic liquid blends and gel polymer electrolyte follows the Vogel–Tammen–Fulcher (VTF) behaviour. The sodium ion conduction in the gel polymer electrolyte film is confirmed from cyclic voltammetry and transport number measurement. The Na+ ion transport number has been determined to be ∼ 0.23, which suggests the significant contribution of anionic transport along with the possible conduction of component ions of ionic liquid.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 181, Issues 8–10, 29 March 2010, Pages 416–423
نویسندگان
, ,