快速的纳离子导电聚合物电解质通过三角协同战略为近固态电池
Jun Luo1, Mingrui Yang1, Denghui Wang1
1College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, Henan, P. R. China.
Angewandte Chemie (International ed. in English)
|November 14, 2023
概括
这项研究引入了一种新的策略,使用聚合物盐,离子液体和添加剂来增强聚合物电解质中的离子 (Na+) 导电,以制造更安全的电池. 这种方法显著提高了在室温下离子导电性和电池性能.
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:
- 聚合物电解质为准固态电池提供高安全性和可加工性.
- 在室温下缓慢的离子转移阻碍了它们的广泛应用.
研究的目的:
- 在聚合物电解质中加速离子 (Na+) 导电.
- 开发高性能和安全的准固态电池.
主要方法:
- 一个三角协同策略,结合了聚合物盐 (PVDF-HFP/NaTFSI),离子液体 (EmimFSI) 和富含电子的添加剂 (Nerolin).
- 物理化学表征和理论计算来分析离子运输机制.
- 准固态电池电池的制造和测试.
主要成果:
- 该战略通过削弱聚合物链相互作用和创建额外的离子通路,显著提高了Na+导电能力.
- 富含电子的Nerolin促进了NaTFSI解离和抑制了阴离体迁移,降低了离子运输的能量屏障.
- 在25°C达到高离子导电性 (1.37×10−3 S cm−1) 和离子转移数 (tNa+ = 0.79).
- 证明了可靠的速率能力和稳定性 (200个周期,在0.5°C时99.2%的容量保留) 与增强的安全性.
结论:
- 拟议的三角协同战略有效地加速了聚合物电解质中的离子运输.
- 这种方法导致了高性能,安全的准固态电池,具有更好的离子导电性和稳定性.
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