N-vinylimidazole,methyl bromoacetate and lithium trifluoromethanesulfonimide(LiTFSI) being the materials,poly(methyl 2-(3-vinylimidazolidin-1-yl) acetate trifluoromethanesulfonimide(PMVIm-TFSI) was synthesized by solution polymerization.Different composition of polymer electrolytes were prepared by blending PMVIm-TFSI with LiTFSI and poly(methyl methacrylate-co-vinyl acetate)(P(MMA-VAc)).1H NMR,FT-IR,DSC,TGA,XRD,SEM and AC impedance results revealed that when PMVIm-TFSI was added into polymer electrolytes consisting of P(MMA-VAc)/LiTFSI,the thermal stability and ionic conductivity improved significantly,the maximum of which is 4.71×10-4S/cm at 30℃.Moreover,P(MMA-VAc)/PMVIm-TFSI/LiTFSI electrolyte membrane(transmittance≥90%) can be used as the ion-conductive layer material for electrochromic devices(ECDs),which revealed excellent electrochromic performance.%以N-乙烯基咪唑、溴乙酸甲酯和二(三氟甲基磺酰亚胺)锂(LiTFSI)为原料,采用溶液聚合法制备了聚(1-乙烯基-3-乙酸甲酯基咪唑二(三氟甲基磺酰亚胺))(PMVIm-TFSI)。将其与LiTFSI和聚(甲基丙烯酸甲酯-醋酸乙烯酯)(P(MMA-VAc))共混制得了不同质量比的聚合物电解质。核磁共振(1 HNMR)、红外光谱(FT-IR)、示差扫描量热计(DSC)、热重分析(TGA)、X射线衍射(XRD)、扫描电镜(SEM)、交流阻抗(AC impedance)等对电解质的测试结果表明,PMVIm-TFSI掺杂到P(MMA-VAc)和LiTFSI组成的电解质中后其电导率得到了极大的改善,30℃下最高可达4.71×10-4S/cm,同时热稳定性也得到了极大的提高。此外,该共混电解质(透过率≥90%)还可以运用到电致变色器件(ECD)导电离子材料中,也显示出了优良的电化学性能。
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