Recently, ionic liquid-based gel polymer electrolytes (IL-GPEs) attracted increasing attention because of its use in developing safe and flexible rechargeable lithium-based batteries. The IL-GPE composed of microporous polymer PVdF-HFP incorporating different weight percentages of ionic liquid PYR₁₃FSI with 20 wt% lithium salt LiTFSI is prepared. These prepared films are investigated in detail by thermogravimetric analysis, impedance spectroscopy, cyclic voltammetry and linear sweep voltammetry measurements for battery application. The 70 wt% IL containing GPE shows excellent thermal stability up to ∼240 °C and high lithium ion conductivity (1.6 × 10⁻³ S cm⁻¹ at 30 °C) with wide electrochemical stability window (∼4.3 V vs. Li/Li⁺ at 30 °C). Furthermore, the Li⁺-ion conductive Li₂CuO₂ is coated on LiNi_0.33Mn_0.33Co_0.33O₂ (Li₂CuO₂@LNMC) cathode particle by using a wet chemical method. The structural and electrochemical properties of pristine and Li₂CuO₂@LNMC cathode are investigated using XRD, SEM, TEM and electrochemical analysis. The XRD pattern shows that no impurity phase is present in the Li₂CuO₂@LNMC cathode. Thin Li₂CuO₂ coating layer (20–25 nm) on the surface of LNMC particle is confirmed by TEM image. The optimized electrolyte is used to fabricate Li-cells (Li/LNMC and Li/Li₂CuO₂@LNMC). The charge-discharge results show that the initial specific discharge capacity of Li₂CuO₂@LNMC is ∼196 mAh g⁻¹ at 0.1C (25 mA g⁻¹), whereas, the pristine LNMC has ∼182 mAh g⁻¹ under same condition. The Li₂CuO₂ coating layer improves electrochemical performance and cyclic stability of pristine cathode up to 100th cycles at 1 C-rate. The capacity retention is ∼69% for Li₂CuO₂@LNMC over 100th charge-discharge cycles at 1C, whereas, the capacity retention is only ∼30% for pristine LNMC. After cycling, the EIS results also indicate that the impedance of Li/LNMC cell reduces after Li₂CuO₂ modification.

近年来，由于离子液体基凝胶聚合物电解质（IL-GPE）用于开发安全，灵活的可充电锂基电池，因此受到越来越多的关注。制备由微孔聚合物PVdF-HFP组成的IL-GPE，该微孔聚合物结合了不同重量百分比的离子液体PYR ₁₃ FSI和20 wt％的锂盐LiTFSI。通过热重分析，阻抗谱，循环伏安法和线性扫描伏安法测量这些制备的薄膜，以用于电池应用。含70 wt％IL的GPE在高达约240°C的温度下具有出色的热稳定性，并且锂离子传导率高（30°C时为1.6×10 ^-3  S cm ^-1），电化学稳定性窗口宽（约4.3 V vs. Li /李⁺在30°C下）。此外，通过使用湿化学方法，将Li ⁺离子导电性Li ₂ CuO ₂涂覆在LiNi _0.33 Mn _0.33 Co _0.33 O ₂（Li ₂ CuO ₂ @LNMC）阴极颗粒上。利用XRD，SEM，TEM和电化学分析研究了原始的Li ₂ CuO ₂ @LNMC阴极的结构和电化学性能。XRD图谱表明在Li ₂ CuO ₂ @LNMC阴极中不存在杂质相。稀薄的Li ₂ CuO ₂通过TEM图像确认LNMC颗粒表面的涂层（20–25 nm）。优化的电解质用于制造锂电池（Li / LNMC和Li / Li ₂ CuO ₂ @LNMC）。充放电结果表明，Li的初始放电比容量₂的CuO ₂ @LNMC是~196毫安克^-1在0.1C（25毫安克^-1），而，原始LNMC具有~182毫安克^-1下同样的条件。Li ₂ CuO ₂涂层在1 C速率下可提高原始阴极的电化学性能和循环稳定性，直至第100个循环。Li ₂ CuO ₂的容量保持率为〜69％@LNMC在1C的第100次充放电循环中，而原始LNMC的容量保持率仅为〜30％。循环后，EIS结果还表明，Li ₂ CuO ₂改性后，Li / LNMC电池的阻抗降低。