PEO-Based Solid Polymer Electrolyte with MOF-Modified Melamine–Formaldehyde Resin for Solid-State Lithium Batteries

作者：Haodong Sun, Hao Wang, Bing Li, Cheng Lian, Haiping Su, Jingkun Li, Honglai Liu · 发表于：Industrial & Engineering Chemistry Research · 年份：2026 · DOI：10.1021/acs.iecr.6c00944 · 被引用次数：1 · 研究领域：Advanced Battery Materials and Technologies、Advancements in Battery Materials、Thermal Expansion and Ionic Conductivity

Solid polymer electrolytes (SPEs) are promising solutions to address insufficient energy density along with the safety risks brought by liquid electrolytes in commercial lithium-ion batteries. Nevertheless, SPEs are still limited by low room-temperature ionic conductivity and weak mechanical properties, which greatly restrict their practical application. In this work, a poly(ethylene oxide) (PEO)-based SPE composed of rigid substrates was proposed, which showcased a high Young’s modulus of 3.38 MPa. Meanwhile, with the inorganic MOF filler and organic succinonitrile (SN) plasticizer, the Z@MEL/PEO-SN SPE demonstrated a high ionic conductivity of 5.5 × 10 –5 S·cm –1 and lithium transference number of 0.46 at 25 °C. The Li|Z@MEL/PEO-SN|Li symmetric cell could cycle stably for over 2000 h at a current density of 0.025 mA·cm –2 at ambient temperature. The Li|Z@MEL/PEO-SN|LiFePO 4 full cell maintained a capacity retention of 94.2% after 100 cycles at room temperature at 0.2 C. These results suggest that this SPE is a promising candidate for the next generation of solid-state lithium-ion batteries with a high energy density and improved safety.