相关实验视频
Updated: May 15, 2025

06:15
Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
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基于N-Methyltrifluoroacetamide和Lithium Bis ((trifluoromethanesulfonyl) imide作为具有低粘度和高离子导电性的新电解质的深度修炼溶剂
Guihong Lyu1, Carsten Korte2, Jiangshui Luo1
1Laboratory of Electrolytes and Phase Change Materials, College of Materials Science and Engineering & Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Sichuan University, Chengdu 610065, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
这项研究探讨了一种使用N-甲基三乙胺和LiTFSI的新型深溶解剂 (DES),其热稳定性,低粘度和高离子导电性为更安全,更广泛的温度电解质提供了希望.
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
- 物理化学 物理化学
背景情况:
- 作为传统电解质的替代品,深度浸泡溶剂 (DES) 正在引起人们的注意.
- 开发安全高效的电解质用于广泛的温度应用仍然是一个挑战.
研究的目的:
- 合成和描述一种新型的DES,使用N-甲基三乙胺 (FNMA) 作为键供体 (HBD) 和二三甲硫) 胺 (LiTFSI) 作为键受体 (HBA).
- 为潜在的电解质应用研究FNMA-LiTFSI DES的热和传输特性.
主要方法:
- 二元相位图的合成和表征.
- 热稳定性分析 (热重力测量分析).
- 可燃性,粘度和离子导电性的测量.
- 使用Vogel-Fulcher-Tammann (VFT) 方程分析温度依赖的运输特性.
- 沃尔登图片来确定离子运输机制.
主要成果:
- 鉴定出一种欧性阶段,LiTFSI的摩尔比为0.2到0.33,表现出低于-84°C的欧性温度.
- 该DES-4:1组合 (FNMA:LiTFSI = 4:1) 显示出高热稳定性 (起点为78°C),低粘度 (25°C时为48.9 mPa s),高离子导电性 (25°C时为0.86 mS cm-1),以及不易燃性.
- 运输特性遵循VFT方程,随着HBD:HBA比率的增加,粘度下降,离子导电性增加.
- 观察到离子运输和粘性流之间的强合,车辆运输被确定为DES-4:1和DES-3:1的主要机制.
结论:
- FNMA-LiTFSI DES对电解质应用具有有利的性能,包括广泛的操作温度范围和增强的安全性.
- 这些发现建议设计具有可调节性质的低盐度电解质的策略.
- 这项研究有助于开发用于储能设备的先进电解质.
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