混合电解质系统由双重超轻毒膜建立,使高压水性金属电池成为可能
Qifei Wang1,2, Changhao Wang3, Yu Qiao3
1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|April 12, 2024
概括
这项研究引入了使用混合电解质系统的高压水性金属电池 (HVALMB). 这一突破通过隔离水性和非水性电解质,防止腐蚀,使安全,高能量密度的电池成为可能.
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:
- 水性可充电电池提供安全和环境的好处,但与低能量密度作斗争.
- 由于安全性和稳定性问题,将高能量密度金属阳极与水性电解质相连仍然是一个重大挑战.
研究的目的:
- 为高压水性金属电池 (HVALMB) 开发一种新的混合电解质系统.
- 克服传统水性电解质在实现高能量密度和金属阳极稳定性方面的局限性.
主要方法:
- 使用混合电解质策略,以缩的三元盐以基电解质 (CTE) 作为解质,并以盐中的水 (WiS) 电解质作为解质.
- 引入了一种低液体双重超溶性膜分离器,以隔离不可混合的电解质,并防止水性阴解质透到阳极.
- 使用开发的混合电解质系统制造了一个LiNi0.8Mn0.1Co0.1O2的Li (有限) 电池.
主要成果:
- 在酸盐中实现了稳定和可逆的金属涂层/脱落.
- 在水性阴解质中成功运行了高压阴极.
- 经过300个循环后,具有81.0%的容量保留,证明了长期循环稳定性.
- 达到682Wh kg-1.1的高能量密度.
结论:
- 混合电解质系统有效地将金属阳极与水性电解质相结合,使HVALMBs的制造成为可能.
- 双重超性膜分离器对于防止质子诱导的腐蚀和确保系统稳定性至关重要.
- 这种方法为更安全,高性能水性可充电电池铺平了道路.
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