在离子电池的复合聚合物电解质中具有阴离子受约束中心的多孔芳香框架填充剂
Tingting Ma1, Bin Fu1, Hua Feng1
1School of Chemical and Environmental Engineering, Changchun University of Science and Technology, Changchun, 130022, P.R. China.
Angewandte Chemie (International ed. in English)
|April 18, 2025
概括
一种新的多孔芳香框架 (PAF-142) 增强了离子电池的固体聚合物电解质 (SPEs). 这提高了离子导电性,并抑制了树突的生长,使电池能够稳定地循环运行.
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
- 聚合物科学 聚合物科学
背景情况:
- 在离子电池 (LIBs) 中的固体聚合物电解质 (SPEs) 面临着低Li+导电性和树形成的挑战.
- 这些局限性阻碍了更安全,更有效的LIBs的广泛采用.
研究的目的:
- 为LIBs开发一种复合聚合物电解质 (CPE),具有增强的离子导电性和更好的安全性.
- 为了研究一个阴离子多孔芳香框架 (PAF-142) 提高SPE性能的机制.
主要方法:
- 设计和合成一个阴离子多孔芳香框架 (PAF-142).
- 将PAF-142纳入SPEs中,以创建一个复合聚合物电解质 (CPE).
- 利用密度函数理论 (DFT) 和分子动力学模拟来阐明运输机制.
主要成果:
- 复合聚合物电解质 (PAF-142-CPE) 在20°C时具有8.77 × 10-4 S cm-1的Li+导电性.
- 形成了稳定的接口,有效地抑制了树的生长,导致Li//PAF-142-QCPE//Li细胞的稳定循环超过8500小时.
- //PAF-142-QCPE//LFP细胞显示出卓越的周期寿命,超过1400个周期.
结论:
- 通过促进Li+运输和盐分离,PAF-142作为一种有效的填充剂来提高SPE性能.
- 开发的复合聚合物电解质为推进下一代离子电池的安全性和性能提供了有前途的解决方案.
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