通过粘土矿物质的微结构调节以PEO为基础的固态电解质中的离子运输
Wankai Wang1,2, Yanfei Yang1,2, Junping Zhang1,2
1Research Center of Resource Chemistry and Energy Materials, Key Laboratory of Clay Mineral of Gansu, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China.
ACS applied materials & interfaces
|January 11, 2025
概括
粘土矿物质增强聚合物复合物固体电解质,以改善离子运输. 拉波尼特纳米板显著提高电导率和电池性能,提供更安全,更稳定的储能解决方案.
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:
- 粘土矿物质是聚合物复合物固体电解质 (CSEs) 的有希望的填充物.
- 了解粘土微观结构如何影响离子 (Li+) 运输至关重要,但尚未得到充分研究.
- 聚乙烯氧化物 (PEO) 是CSE的常见聚合物矩阵.
研究的目的:
- 研究各种粘土矿物质微结构对以PEO为基础的CSE中的Li+运输的影响.
- 确定最佳的粘土填充剂,以增强CSE特性.
- 评估CSEs在固态电池中的性能和安全性.
主要方法:
- 基于PEO的CSE的设计和合成,其中包括1D化石纳米管,2D拉波尼特 (Lap) 纳米片和3D多孔二氧化.
- +导电性,+转移数和氧化稳定性的表征.
- 固态LiLiFePO4电池和袋式电池的制造和测试.
主要成果:
- 2D拉波尼特纳米板表现出优越的Li+导电性 (1.67 × 10-4 S cm-1在30°C),Li+转移数 (0.72),以及氧化稳定性 (4.7V).
- PEO/Lap CSEs在LiLiFePO4电池中实现了高可逆容量和出色的循环稳定性 (250个循环后90.2%的保留率).
- 带有PEO/Lap CSE的袋式电池在极端条件下表现出增强的安全性.
结论:
- 粘土填充剂的微观结构显著影响了基于PEO的CSE中的Li+运输路径.
- 2D拉波尼特纳米板在优化先进离子电池的CSE特性方面非常有效.
- 这项研究为设计高性能和安全的基于粘土的CSEs提供了宝贵的见解.
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