Most solid polymer electrolytes (SPEs) still suffer from low ionic conductivity at room temperature, which may be caused by the inhomogeneity of polymer blend and Li-salt. Here, polyethylene oxide (PEO), polyvinyl alcohol (PVA), and lithium hydroxide (LiOH) SPEs were prepared by an ultrasonic method to improve the ionic conductivity and shorten the synthesis time. This procedure has successfully yielded a flexible, transparent, and homogeneous SPEs, which were thermally stable at fairly high temperature as revealed from thermogravimetric analysis (TGA). These samples also showed relatively high ionic conductivity at room temperature with the highest conductivity of 1.25 × 10⁻⁴ S/cm and low activation energy of 0.253 eV demonstrated by sample with 2 wt% LiOH loading. Moreover, this sample was also stable in the measured voltage range, i.e., -5 to 5 V. DFT calculation showed that strong intermolecular charge transfer was present in the interaction between Li⁺ ion with PVA and PEO chain.

大多数固体聚合物电解质（SPE）在室温下仍具有较低的离子电导率，这可能是由于聚合物共混物和锂盐的不均匀性引起的。在此，通过超声方法制备了聚环氧乙烷（PEO），聚乙烯醇（PVA）和氢氧化锂（LiOH）SPE，以提高离子电导率并缩短合成时间。该程序成功地产生了一种柔性，透明且均质的SPE，如热重分析（TGA）所示，它们在相当高的温度下具有热稳定性。这些样品在室温下还显示出较高的离子电导率，最高电导率为1.25×10 ^-4S / cm和0.253 eV的低活化能通过具有2 wt％LiOH负载的样品证明。此外，该样品在测量的电压范围（即-5至5 V）中也很稳定。DFT计算表明，Li ⁺离子与PVA和PEO链之间的相互作用中存在强分子间电荷转移。