在高电压高性能离子电池中,化和化之间最佳的混合
Yong Sheng1, Bo Liu2, Junjiang He1
1China Academy of Safety Science and Technology, Beijing 100012, China.
Materials (Basel, Switzerland)
|January 25, 2025
概括
高压离子电池的最佳混合物是使用1,1,2,2-四甲基-2,2,3,3-四烯乙烯 (TTE) 与乙烯碳酸盐 (FEC) 和3,3,3-三烯碳酸盐 (TFEC) 的混合物. 这种基于TTE的电解质提高了性能和安全性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 高压离子电池需要先进的电解质来提高性能和安全性.
- 碳酸盐和乙烯是高压电解质配方的有希望的候选者.
研究的目的:
- 为了确定高压离子电池的最佳电解质混合物.
- 评估乙烯碳酸盐 (FEC),3,3,3-三烯碳酸盐 (TFEC) 和乙烯对细胞性能和安全的影响.
主要方法:
- 对含有FEC,TFEC和乙烯 (HFE,TTE,BTE) 的电解质混合物的实验研究.
- 长期循环在4.5V以评估容量保留.
- 评估速度能力,高温性能和滥用条件下的安全性.
主要成果:
- 含有1,1,2,2-四乙烯-2,2,3,3-四乙烯 (TTE) 的电解质在4.5V时显示出优异的容量保留.
- 基于TTE的电解质改善了离子动力学,形成了稳定的电极-电解质接口,抑制了副作用.
- 在含有TTE的细胞中观察到增强的速率能力,高温性能和出色的安全性能.
结论:
- 与FEC和TFEC相结合,TTE是高性能,高压离子电池的非常有前途的电解质组件.
- 优化的电解质提供了电化学性能,安全性和潜在的成本效益的平衡.
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