Solid polymer electrolytes with superior flexibility, non-flammability, and good mechanical intensity show great potential in eliminating the flammable hazard of liquid solvent and suppressing lithium dendrite growth. However, inherent limitations (e.g., low ionic conductivity) severely hinder their practical applications. Herein, a novel polymer electrolyte (PHLC), which consists of PVDF-HFP as matrix, LiTFSI as electrolyte filler, and cellulose acetate propionate (CAP) as organic filler, was designed and fabricated by a simple blending process. Since CAP played crucial roles in reducing PVDF-HFP crystallinity, promoting LiTFSI dissociation, and providing migration pathways for Li⁺, the obtained PHLC (20% CAP) membrane demonstrated an improved ionic conductivity of 1.25 × 10⁻⁴ S/cm at 30 °C and a much higher lithium-ion transference number (0.49 vs. 0.29) compared to the membrane without CAP. In addition, the electrochemical stability and cycle stability of membrane were boosted by introducing CAP. After 150 h of Li stripping/plating at 0.1 mA/cm², the PHLC (20% CAP) membrane only exhibited a tiny polarization voltage of 30 mV. Moreover, the assembled LiFePO₄|PHLC|Li cell displayed a reversible capacity of 139.7 mAh/g and a low capacity fading (1.6%) after 70 cycles at 0.2C. This work offers a promising insight into the exploitation of advanced polymer electrolytes.

固体聚合物电解质具有优异的柔韧性、不燃性和良好的机械强度，在消除液体溶剂的易燃危险和抑制锂枝晶生长方面显示出巨大的潜力。然而，固有的限制（例如，低离子电导率）严重阻碍了它们的实际应用。在此，通过简单的共混工艺设计和制造了一种新型聚合物电解质（PHLC），它由 PVDF-HFP 为基体，LiTFSI 为电解质填料，醋酸丙酸纤维素（CAP）为有机填料。由于 CAP 在降低 PVDF-HFP 结晶度、促进 LiTFSI 解离和为 Li ^{+提供迁移途径方面发挥着至关重要的作用}，因此获得的 PHLC (20% CAP) 膜的离子电导率提高了 1.25 × 10与没有 CAP 的膜相比，在 30 °C 时为^-4  S/cm，锂离子迁移数（0.49对0.29）要高得多。此外，通过引入CAP提高了膜的电化学稳定性和循环稳定性。在 0.1 mA/cm ²的 Li 剥离/电镀 150 小时后，PHLC (20% CAP) 膜仅表现出 30 mV 的微小极化电压。此外，组装的 LiFePO ₄ |PHLC|Li 电池在 0.2C 下循环 70 次后显示出 139.7 mAh/g 的可逆容量和低容量衰减 (1.6%)。这项工作为开发先进的聚合物电解质提供了有希望的见解。