Gel polymer electrolytes (GPEs) have attracted extensive attention in lithium-ion batteries due to their high security and excellent electrochemical performance. However, their inferior Li-ion transference number, low room-temperature ionic conductivity, and poor long cycle stability raise challenges in practical applications. Herein, a flexible poly(vinylidene fluoride-co-hexafluoropropylene)-butanedinitrile (PVDF-HFP-SN)-based GPE (PSGPE) is synthesized successfully by a general immersion precipitation method. The resultant PSGPEs have numerous connecting pores to ensure sufficient space for liquid electrolytes. Moreover, the reduced crystallinity of PVDF-HFP and the high polarity of SN can reduce the energy barrier of Li-ions shuttling between pores. The synergistic effect possesses a high ionic conductivity of 1.35 mS·cm⁻¹ at room temperature with a high Li-ion transference number of 0.69. The PVDF-HFP-SN-based GPE is applied in a LiFePO₄/graphite battery, which can realize stable cycling performance for 350 cycles and good rate performance at room temperature. These results demonstrate that the novel PSGPE possesses advantage in simplified production process, which can improve the practicability of gel polymer lithium-ion batteries.

凝胶聚合物电解质（GPEs）由于其高安全性和优异的电化学性能而在锂离子电池中引起了广泛关注。然而，它们较差的锂离子迁移数、较低的室温离子电导率和较差的长循环稳定性给实际应用带来了挑战。在此，通过一般浸渍沉淀法成功合成了一种基于柔性聚（偏二氟乙烯-共-六氟丙烯）-丁二腈 (PVDF-HFP-SN) 的 GPE (PSGPE)。所得 PSGPE 具有许多连接孔，以确保为液体电解质提供足够的空间。此外，PVDF-HFP 的结晶度降低和 SN 的高极性可以降低锂离子在孔隙间穿梭的能垒。协同效应具有1.35 mS·cm的高离子电导率^-1在室温下具有 0.69 的高锂离子转移数。基于PVDF-HFP-SN的GPE应用于LiFePO ₄ /石墨电池，可实现350次循环的稳定循环性能和良好的室温倍率性能。这些结果表明新型PSGPE在简化生产过程方面具有优势，可以提高凝胶聚合物锂离子电池的实用性。