低温和快充的金属电池 低温和快充的金属电池
Dandan Yu1,2, Zhenya Wang3, Jiacheng Yang3
1Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, China.
Small (Weinheim an der Bergstrasse, Germany)
|February 22, 2024
概括
这项研究开发了先进的金属电池 (SMB),用于高效的低温快速充电应用. 创新的电解质和电极设计克服了关键的挑战,在低温条件下实现了稳定和高容量的能量存储.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属电池 (SMB) 的低温运行受到不稳定的固体电解质介相 (SEI),树脂增长和缓慢的离子动力学的阻碍,导致显著的容量损失.
- 开发高速,低温的储能解决方案对于扩大中小企业的应用范围至关重要.
研究的目的:
- 设计一种新的SMB系统,能够在低温和高充电率下稳定高性能运行.
- 为了应对SEI不稳定性,树突形成和冷中小企业缓慢离子传输的挑战.
主要方法:
- 电解质和电极组件的协同设计,以提高电池性能.
- 优化一个弱溶解的双盐电解质,以促进可逆的涂/剥离,并形成一个富含NaF的SEI层.
- 在现场制造一个集成的硫化铜电极通过直接化学硫化,以提高导电性和离子扩散.
主要成果:
- 开发的SMB在-20°C和1°C充电速率下显示了202.8mAhg-1的可逆容量.
- 在-40°C下观察到异常性能,在0.2°C下容量为230.0mAh-1g.
- 集成的电极和优化的电解质有效地稳定了金属阳极,并增强了电荷传递动力学.
结论:
- 协同的电解质和电极设计成功克服了低温,高速率的SMB操作的关键限制.
- 这项工作为冷金属电池的开发提供了有前途的途径,并扩大了低温储能电极材料的选择.
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