PEO/PVDF–HFP [poly(ethylene oxide)/poly(vinylidene fluoride-co-hexafluoropropylene)] solid polymer electrolyte blend incorporating varying weights of LiTFSI [lithium bis (trifluoromethane) sulfonimide] salt was prepared. The blend with 20 wt.% of salt that exhibits maximum ionic conductivity was subjected to microstructural modification by exposing to low-energy ions of oxygen at different fluences. The ionic conductivity of the system increases by one order in magnitude when subjected to oxygen ion irradiation. The dielectric loss tangent curves are used to extract ions relaxation time. The relaxation time τ of the system is reduced from 1.42 to 0.71 μs upon irradiation which indicates enhanced segmental motion due to a rise in amorphous region in polymer matrix. The ion activation energy in the system decreases to 0.041 eV from 0.063 eV. Dielectric studies suggest an increase in dipoles in the irradiated systems possibly due to polymer chain scission in the matrix. The increase in disordered phase by ion irradiation is supported by change in crystallinity from 24% for the unirradiated systems to about 14% for the irradiated systems by X-ray diffraction and differential scanning calorimetry analysis. The shift in prominent peaks observed in Fourier transform infrared spectroscopy suggests possible scission of the polymer chains.

制备了PEO / PVDF-HFP [聚环氧乙烷/聚偏氟乙烯-六氟丙烯共聚物]固体聚合物电解质共混物，其中掺入了不同重量的LiTFSI [双（三氟甲烷）磺酰亚胺锂]盐。通过以不同的通量暴露于低能量的氧离子，将具有20％（重量）的盐（具有最大的离子电导率）的共混物进行微结构改性。当经受氧离子辐照时，系统的离子电导率增加一个数量级。介电损耗正切曲线用于提取离子弛豫时间。弛豫时间τ辐照后，系统的光强从1.42降低到0.71μs，这表明由于聚合物基质中非晶区域的增加，节段运动增强了。系统中的离子活化能从0.063 eV降至0.041 eV。介电研究表明，受辐照系统中偶极子的增加可能是由于基质中的聚合物链断裂所致。通过X射线衍射和差示扫描量热法分析，结晶度从未辐照体系的24％增加到辐照体系的约14％，这支持了离子辐照引起的无序相的增加。在傅立叶变换红外光谱中观察到的突出峰的移动表明聚合物链可能断裂。