简单的策略,通过层层组装来制备聚离子液) 涂层固体聚合物电解质
Zongyu Wang1, Bishnu P Thapaliya1, Ilja Popovs1
1Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
ACS applied materials & interfaces
|October 25, 2023
概括
研究人员使用层次组装开发了先进的固体聚合物电解质,用于灵活的金属电池. 这些电解质具有高离子导电性和机械强度,为商业化铺平了道路.
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
- 聚合物化学 聚合物化学
背景情况:
- 固体聚合物电解质对于金属电池 (LMB) 至关重要,但在平衡机械强度和离子导电性方面面临挑战.
- 层层组装 (LbL) 已经显示出用于制造电化学设备的柔性固体聚合物电解质的潜力.
研究的目的:
- 开发一种用于构建具有增强离子导电性和机械性能的固体聚合物电解质的新策略.
- 为了研究这些电解质在金属电池应用中的性能.
主要方法:
- 使用LbL组件创建超薄的电解质膜,交替使用聚离子和聚离子层.
- 嵌入的聚离子液体) 骨架和聚乙烯甘醇 (PEG) 侧组,以增强离子传输.
- 制造出独立的膜,并将它们组装成Li/LiFePO4电池电池.
主要成果:
- 取得了良好的离子导电性,范围为9.03-10 × 10^-4 S cm^-1.
- 在Li/LiFePO4电池中,在60°C时具有高的初始放电容量 (143-158 mAhg^-1),并具有高的coulombic效率.
- 获得了具有优越的离子导电性和机械强度的固体聚合物电解质膜.
结论:
- 聚合物合成和LbL自组合的结合方法为制造先进的固体聚合物电解质提供了有效的途径.
- 这些电解质显示出在灵活的电化学设备和高压电池应用中使用的巨大潜力.
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