|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|1295446||1498250||2016||5 صفحه PDF||سفارش دهید||دانلود رایگان|
• Gel electrolytes were prepared from vinyl monomer having branched pendant group.
• Terminal nitrile groups in the pendant group interact with lithium ions in the gel.
• Conductivity of the gel electrolytes was 0.38 mS cm− 1 at 293 K.
• The gel electrolyte was electrochemically stable around 4.6 V against Li electrode.
We prepared new gel polymer electrolytes composed of a poly(methacrylamide) derivative having tri(cyanoethoxymethyl) group (PMCA), poly(ethylene glycol)dimetharylate (PGM400), lithium bis(trifluoromethylsulfonyl)amide (LiTFSA) and propylene carbonate (PC). The gel polymer electrolytes were prepared by photo-initiated radical polymerization using 2-benzoyl-2-propanol as an initiator. The highest ionic conductivity for the obtained gel polymer electrolytes was 0.38 mS cm− 1 at 293 K and 2.46 mS cm− 1 at 343 K. Analysis of IR spectra of the gel electrolyte films suggested that lithium ions interacted with both nitrile groups in PMCA and carbonate groups in PC at higher lithium salt concentration. In contrast, lithium ion was solvated preferentially by the nitrile groups of PMCA at lower lithium salt concentration even in the presence of PC. The gel polymer electrolytes showed oxidation stability up to ca. 4.6 V against a lithium electrode. Reversible plating and stripping responses of lithium on a nickel electrode in the gel polymer electrolytes were also confirmed by cyclic voltammetry.
Journal: Solid State Ionics - Volume 293, 1 October 2016, Pages 13–17