固态含胺聚合物的结构,离子和电子特性,用于全有机电池
Riccardo Alessandri1, Cheng-Han Li2, Sheila Keating3
1Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
JACS Au
|June 28, 2024
概括
基于Phthalimide的聚合物显示出作为全有机电池的阳极材料的前景. 这些聚合物具有显著增强的电子传输特性,为先进的电池技术铺平了道路.
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
- 计算化学的计算化学
背景情况:
- 全有机电池需要正极和阳极氧化还原活性聚合物用于固态电极.
- 氧还原活性聚合物的开发至关重要,但目前是有限的.
- 含胺的聚合物被探索为潜在的阳极材料.
研究的目的:
- 预测含胺聚合物的固体结构性,离子性和电子性质,用于全有机电池中的阳极材料.
- 建立一个多尺度的方法,将分子特征与宏观电池性能联系起来.
- 调查聚合物结构,电荷状态和膨胀对运输特性的影响.
主要方法:
- 采用了多尺度的方法,结合了原子学分子动力学,电子结构计算和机器学习替代模型.
- 研究了不同聚合物骨干和操作因素 (充电状态,胀) 的影响.
- 通过弥合分子和凝聚相性质,计算出电子传输的表面扩散系数 (D_app).
主要成果:
- 电荷状态显著影响聚合物包装和热物理性质,影响离子和电子运输.
- 电子传输能力是由分子 (重组能量) 和凝聚相 (跳跃距离) 属性的组合决定的.
- 与氧化物基聚合物基聚合物相比,以氧化物基聚合物为基础的聚合物显示D_app (≈10^-6 cm^2 s^-1) 增加了三级.
结论:
- 含胺的聚合物作为全有机电池的阳极材料具有很高的前景.
- 它们的特殊预测电子运输能力是它们潜力的关键.
- 多尺度方法有效地预测了电池应用中的材料性能.
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