分子合策略实现在现场合成无聚合的固体复合电解质
Yuanze Zhu1,2, Yiwei Zheng2, Jie Liu1
1College of Chemistry and Chemical Engineering, Nantong University, Seyuan 9, Nantong 226019, China.
The journal of physical chemistry letters
|January 16, 2024
概括
研究人员开发了一种新的固体复合电解质,通过化学结合聚乙烯碳酸盐和蒙特莫里隆尼特. 这可以防止粒子聚集,提高离子导电性和电池性能,以实现更安全,更高效的能量存储.
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:
- 固体复合电解质 (SCE) 结合了无机和聚合物特性,用于实际应用.
- 在SCE中界面稳定性差导致粒子聚合,并阻碍离子 (Li+) 运输.
研究的目的:
- 为了创建一个无聚合的固体复合电解质,提高了界面兼容性.
- 为了提高先进电池的Li +导电性,转移数和氧化潜力.
主要方法:
- 在现场固化使用三氧乙烯 (VTEO) 来化学连接聚乙烯碳酸 (PVC) 和蒙莫里隆石 (MMT).
- 合成的PVC-s-MMT固体复合电解质的特征.
- /PVC-s-MMT/LiFePO4电池电池的制造和测试.
- 密度函数理论 (DFT) 计算用于分析离子运输路径.
主要成果:
- 在25°C时达到0.4mS cm-1的Li+导电性.
- 增强的Li+转移率为0.74和氧化潜力为5.2V.
- 在室温下在LiFePO4细胞中表现出极好的循环稳定性 (>600个循环后99.5%).
结论:
- 通过VTEO介导的现场方法有效地防止了聚合,并提高了SCE的界面兼容性.
- 开发的PVC-s-MMT电解质提供了优越的电化学性能,适用于下一代离子电池.
- 这种合成方法与现有的工业电池制造工艺兼容.
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