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多站点交联聚乙基聚合物电解质用于高压固态金属电池

Fei Pei¹, Yimeng Huang², Lin Wu¹

¹State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

Advanced materials (Deerfield Beach, Fla.)

|October 25, 2024

概括

这项研究引入了一种新型的交联聚合物电解质,用于高压金属电池,提高安全性和能量密度. 这种新材料具有出色的导电性,机械强度和长周期寿命,可用于先进的电池应用.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
聚合物化学聚合物化学

背景情况:

固态聚合物电解质 (SPEs) 对于高能量密度和安全的高压金属电池至关重要.
现有的SPE由于机械强度差,离子导电性低,高压接口不稳定而受到影响.
克服这些局限性是实现下一代电池充分潜力的关键.

研究的目的:

开发一种基于聚乙的新型交联聚乙烯 (SPE),具有用于高压金属电池的增强性能.
为了改善Li+运输,机械稳定性和界面兼容性.
为了证明开发的SPE在高能量密度电池系统中的实际应用性.

主要方法:

使用氨基基改性Zr-氨酸基金属有机框架 (ZrMOF) 作为交叉链接节点制造交叉链接的聚乙基SPE.
描述SPE的离子导电性,机械强度和电化学稳定性.
测试Li的电池和LiNi0.8Co0.1Mn0.1O2电池的对称性,以评估周期寿命和性能.

主要成果:

在30°C时达到高Li+导电性 (5.7 × 10-4 S cm-1) 和高Li+转移数 (0.84).
证明了强大的机械强度,在Li HDD Li对称电池中记录了8000小时的循环寿命.
在1.5Ah袋式电池中实现了高放电容量 (182mAhg-1在500个周期内0.3C) 和高能量密度446Whkg-1的1.5Ah袋式电池.

结论:

这种新的交联SPE表现出优越的离子导电性,机械强度和电化学稳定性.
纳入ZrMOF有效地提高了Li+运输和结构完整性.
开发的SPE显示了在高压固态金属电池的实际应用方面显著的前景.

关键词:

交叉连接的聚合物电解质.高能量密度,高能量密度.高压阴极是高电压的阴极.路易斯的富含酸的MOFs.固态金属电池固态金属电池

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