一种用于高压锂金属电池的具有刚柔耦合结构的聚合物电解质
A Polymer Electrolyte with Rigid-Flexible Coupled Architecture for High-Voltage Lithium-Metal Batteries.
摘要(中文译文)
通过溶液浇铸策略，将聚甲基丙烯酸甲酯（PMMA）/共晶电解质（EE）相集成到多孔聚乙烯（PE）骨架中，制备了一种聚合物电解质。在该刚柔耦合结构中，PMMA基体作为固体宿主，通过其极性羰基与Li配位，从而促进锂盐解离并建立稳定的离子传输网络。所引入的EE由碳酸乙烯酯和LiTFSI组成，有效降低了PMMA的玻璃态刚性，并为快速离子传导提供了连续通道。同时，多孔PE骨架增强了机械强度并抵抗锂枝晶穿透，使电解质薄膜兼具优异的柔韧性。所得电解质在30 °C下离子电导率达到1.59 × 10 S cm，锂离子迁移数为0.45，电化学稳定窗口高达4.75 V。在Li||LiFePO电池中，其在3 C倍率下实现1000次稳定循环，容量保持率为76.8%，库仑效率超过99.9%。该无单体设计消除了通常损害界面稳定性的残留反应性物种，为高电压固态锂金属电池提供了一条可靠路径。
Abstract
A polymer electrolyte is developed by integrating a poly(methyl methacrylate) (PMMA)/eutectic electrolyte (EE) phase into a porous polyethylene (PE) scaffold via a solution-casting strategy. In this rigid-flexible coupled architecture, the PMMA matrix serves as a solid host that coordinates with Li through its polar carbonyl groups, thereby promoting lithium salt dissociation and establishing a stable ion transport network. The incorporated EE, composed of ethylene carbonate and LiTFSI, effectively reduces the glassy rigidity of PMMA and provides continuous pathways for fast ionic conduction. Meanwhile, the porous PE scaffold reinforces mechanical strength and resists lithium dendrite penetration, enabling a thin electrolyte membrane with excellent flexibility. The resulting electrolyte achieves an ionic conductivity of 1.59 × 10 S cm at 30 °C, a lithium-ion transference number of 0.45, and an electrochemical stability window up to 4.75 V. In Li||LiFePO cells, it delivers stable cycling at 3 C for 1000 cycles with 76.8% capacity retention and a Coulombic efficiency exceeding 99.9%. The monomer-free design eliminates residual reactive species that commonly compromise interfacial stability, offering a reliable pathway toward high-voltage solid-state lithium-metal batteries.
如何引用
AMA
Haoru Xie, Zhengyin Yao, Zhen Liu, Ruiyong Chen, Peng Zhang. A Polymer Electrolyte with Rigid-Flexible Coupled Architecture for High-Voltage Lithium-Metal Batteries.. Polymers. 2026; doi:10.3390/polym18080987.
APA
Haoru Xie, Zhengyin Yao, Zhen Liu, Ruiyong Chen, Peng Zhang (2026). A Polymer Electrolyte with Rigid-Flexible Coupled Architecture for High-Voltage Lithium-Metal Batteries.. Polymers. https://doi.org/10.3390/polym18080987
GB/T 7714
Haoru Xie, Zhengyin Yao, Zhen Liu, Ruiyong Chen, Peng Zhang. A Polymer Electrolyte with Rigid-Flexible Coupled Architecture for High-Voltage Lithium-Metal Batteries.[J]. Polymers, 2026 doi:10.3390/polym18080987.
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