基于eutectic的聚合物电解质与增强的盐解离,用于高性能金属电池
Dechao Zhang1,2, Yuxuan Liu1, Zhaoyu Sun1
1Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China.
Angewandte Chemie (International ed. in English)
|September 13, 2023
概括
使用succinonitrile和PEGMEA的新型基于eutectic的聚合物电解质提高了金属电池的性能. 这种材料具有高离子导电性和稳定的接口,可用于高能量密度应用的长期循环.
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:
- 带有金属阳极的固态电池承诺高能量密度.
- 目前的聚合物电解质面临着诸如低离子导电性和差的接口稳定性等挑战.
- 开发先进的聚合物电解质对于实际的金属电池应用至关重要.
研究的目的:
- 为固态金属电池开发一种新型基于eutectic的聚合物电解质.
- 为了克服传统聚合物电解质的局限性.
- 为了提高离子导电性和接口稳定性,以提高电池性能.
主要方法:
- 从苏奇尼尼特 (SN) 和聚乙烯基醇) 甲基乙烯酸乙烯酸盐 (PEGMEA) 合成一种以欧基为基础的聚合物电解质.
- 离子导电性,电化学窗口和与阳极的接口稳定性的表征.
- 制造和测试Li/Li对称电池和Li/LiFePO4和Li/LiNi0.6Co0.2Mn0.2O2袋式电池.
主要成果:
- PAN1.2-SPE (PEGMEA: SN = 1:1.2质量比) 呈现出高离子导电性 (1.30 mS cm−1在30°C) 和卓越的接口稳定性.
- /对称细胞表现出稳定的长期涂层/脱落.
- 在1500个循环后,Li/LiFePO4电池实现了80.3%的容量保留,在袋式电池中表现出色.
结论:
- 这种新型的以eutectic为基础的聚合物电解质显著提高了离子导电性和接口稳定性.
- 这种材料可以使金属阳极在固态电池中的稳定循环.
- 这项研究为设计用于先进金属电池的高性能聚合物电解质提供了新的策略.
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