动态静电屏蔽层的统一离子流效应,以促进对阳极的均质核和沉积
Yuehong Xie1, Yifan Liu1, Dong Li1
1Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, School of Chemistry, Xi'an Jiaotong University, Xi'an, 710049, P.R. China.
Angewandte Chemie (International ed. in English)
|March 5, 2025
概括
一个新的稳定剂增强可充电电池的电解质,防止树的生长和腐蚀. 这提高了电池寿命和大规模储能应用的性能.
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:
- 可充电电池 (RAB) 提供了电网规模储能的潜力.
- 关键的挑战包括Al阳极树突的形成和电解质腐蚀,限制寿命和商业化.
研究的目的:
- 开发一种稳定剂,以增强RAB中的电解质/阳极接口.
- 为了减轻Al阳极树突的形成和电解质腐蚀,以提高电池性能.
主要方法:
- 使用了实验测试和计算模拟.
- 一种稳定剂SDBS (二二硫酸盐) 被研究其对Al阳极和氨酸离子液 (ILs) 的影响.
主要成果:
- SDBS在Al阳极上形成了一层保护层,防止IL腐蚀.
- 稳定剂的功能组通过调节离子流和沉积速度来促进稳定,平面的Al沉积.
- 经SDBS修改的Al//Al电池在高电流密度和容量下显示稳定循环500-1000小时.
- 在1000个循环后,Al/flake石墨全电池实现了90.01 mAh g-1可逆容量.
结论:
- 开发的稳定器显著提高了RAB的循环稳定性和容量保留.
- 这项工作为设计先进电池的有效电解质提供了洞察力.
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