掌握乙烯烯酸作为金属电池应用的凝聚合物电解质的共聚化行为
Weixing Min1, Lengwan Li2, Mingli Wang2
1Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China.
Angewandte Chemie (International ed. in English)
|January 9, 2025
概括
本研究介绍了一种新方法,使用乙烯基烯酸盐 (ECA) 共聚物制造强大的凝聚合物电解质. 这些电解质使得具有高离子导电性的更安全,更持久的金属电池成为可能.
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
- 聚合物化学 聚合物化学
背景情况:
- 具有电子吸收组的聚合物具有高介电常数和电化学稳定性.
- 控制含有蓝的单体的聚合和共聚合是具有挑战性的,因为水的敏感性和副作用.
研究的目的:
- 开发一种易于控制的乙烯基烯酸 (ECA) 共聚合的方法.
- 为先进的金属电池 (LMB) 制造机械坚固的凝聚合物电解质 (GPEs).
主要方法:
- 使用双盐 (LiDFOB和LiTFSI) 来促进根基聚合并抑制ECA的阳离子聚合.
- 加入甲基甲酸盐 (MMA) 加快ECA基聚合,通过DFT计算得到证实.
- 合成ECA基共聚合物用于凝聚合物电解质.
主要成果:
- 在没有不必要的添加剂的情况下,实现了ECA的高效和受控的共聚合.
- 开发了具有高离子导电性的机械坚固的GPE.
- 在1°C的LFP和高压LCO阴极 (4.5V) 的LMB中证明了超长的周期寿命,在1000个周期内分别显示了81.1%和83.8%的容量保留.
结论:
- 开发的基于ECA的GPE为安全和稳定的金属电池提供了有前途的解决方案.
- 控制式共聚合策略提高了机械强度和离子导电性,从而提高了电池的性能.
- 这种方法促进了高压阴极的使用,并使其能够在各种温度下运行.
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