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A novel sp(3)Al-based porous single-ion polymer electrolyte for lithium ion batteries

机译:用于锂离子电池的新型基于sp(3)Al的多孔单离子聚合物电解质

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摘要

We report synthesis of an Al-based porous gel single-ion polymer electrolyte, lithium poly (glutaric acid aluminate) (LiPGAA), using glutaric acid and lithium tetramethanolatoaluminate as the precursors. The three-dimensional network compound provides short lithium-ion transport pathways and allows organic solvents to be accommodated in the composite for rapid ion transport. The tetraalkoxyaluminate units in the material enable Li-ions to be weakly associated with the polymeric framework, leading to a high ionic conductivity of 1.47 x 10(-4) S cm(-1) at room temperature and a high Li-ion transference number of 0.8. A membrane of the polymer was prepared via a solution cast method with PVDF-HFP poly(vinylidene-fluoride-co-hexafluoropropene) followed by soaking in a solution of ethylene carbonate (EC) and propylene carbonate (PC) (v/v, 1 : 1). A Li-ion battery assembled with the composite membrane displays remarkable cyclability with nearly 100% coulombic efficiency over a wide temperature range.
机译:我们报告了铝基多孔凝胶单离子聚合物电解质锂聚(戊二酸铝酸盐)(LiPGAA)的​​合成,使用戊二酸和四甲醇锂铝酸盐作为前体。三维网络化合物提供了短的锂离子传输路径,并允许有机溶剂容纳在复合物中以快速进行离子传输。材料中的四烷氧基铝酸盐单元使锂离子与聚合物骨架弱结合,从而导致室温下的高离子电导率为1.47 x 10(-4)S cm(-1)和高的锂离子转移数为0.8。通过溶液浇铸法用PVDF-HFP聚偏二氟乙烯-共六氟丙烯制备聚合物膜,然后将其浸泡在碳酸亚乙酯(EC)和碳酸亚丙酯(PC)(v / v,1 :1)。组装有复合膜的锂离子电池在很宽的温度范围内具有出色的可循环性,库仑效率接近100%。

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