A lithium difluoro(oxalato)borate (LiODFB) and lithium bis(oxalate)borate (LiBOB) salts in combination with an ionic liquid (N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulphonyl)imide - MePrPyrNTf₂ or 1-ethyl-3-methylimidazolium bis(trifluoromethanesulphonyl)imide - EtMeImNTf₂), sulfolane (TMS) and poly(vinylidene fluoride) (PVdF) were tested as polymer electrolytes (PEs) for Li-ion polymer batteries. Quaternary lithium salt (LiBOB or LiODFB) + ionic liquid (EtMeImNTf₂ or MePrPyrNTf₂) + PVdF + TMS polymer electrolytes were prepared by the casting technique. All the membranes are free-standing, flexible and transparent. Obtained PE films were investigated by electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and the flammability test. Conductivity of the polymer electrolytes ranged from 0.52 to 3.21 mS cm⁻¹ with the activation energy of 34.24 and 19.58 kJ mol⁻¹, respectively. Decomposition of PE does not result in flammable products. The presence of large pores in these membranes ensures better lithium ion transport processes. The polymer electrolytes were used as electrolytes in Li|LiFePO₄ and Li|Li cells which were tested applying EIS, cyclic voltammetry and the galvanostatic method. The electrochemical formation of SEI protects the Li| polymer electrolyte system against its aging (the total impedance evolution with time is much smaller). The LiFePO₄ cathode with the membrane (24.7 wt% PVdF, 2.3 wt% LiODFB, 51.1 wt% EtMeImNTf₂ and 21.9 wt% TMS) exhibited a good reversible capacity of 138 mAh g⁻¹ and 120 mAh g⁻¹ at high current densities (the C/2 and 1C rates).

二氟草酸硼酸锂（LiODFB）和双草酸硼酸锂（LiBOB）盐与离子液体（N-甲基-N-丙基吡咯烷鎓双（三氟甲磺酰基）酰亚胺-MePrPyrNTf ₂或1-乙基-3-测试了甲基咪唑双（三氟甲磺酰基）酰亚胺-EtMeImNTf ₂），环丁砜（TMS）和聚偏二氟乙烯（PVdF）作为锂离子聚合物电池的聚合物电解质（PE）。季锂盐（LiBOB或LiODFB）+离子液体（EtMeImNTf ₂或MePrPyrNTf ₂）+ PVdF + TMS聚合物电解质是通过流延技术制备的。所有的膜都是独立的，灵活的和透明的。通过电化学阻抗谱（EIS），扫描电子显微镜（SEM）和可燃性测试研究了获得的PE膜。聚合物电解质的电导率在0.52至3.21mS cm ^{-1的范围内}，其活化能分别为34.24和19.58kJ mol ^-1。PE分解不会产生易燃产品。这些膜中大孔的存在确保了更好的锂离子传输过程。聚合物电解质用作Li | LiFePO _4中的电解质使用EIS，循环伏安法和恒电流法测试的Li | Li电池。SEI的电化学形成可保护Li | 聚合物电解质系统抵抗其老化（总阻抗随时间的变化要小得多）。具有膜的LiFePO ₄阴极（24.7 wt％PVdF，2.3 wt％LiODFB，51.1 wt％EtMeImNTf ₂和21.9 wt％TMS）在高电流密度下显示出138 mAh g ^-1和120 mAh g ^-1的良好可逆容量。（C / 2和1C费率）。