性天然有机电解质添加剂使得高可逆性金属阳极成为可能
Zining Mei1,2, Yuanxiong Xian1, Haoyu Zhang1
1School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China.
ACS applied materials & interfaces
|January 28, 2026
概括
通过促进均的沉积和抑制副作用反应,L-氨酸显著改善水性离子电池 (AZIB) 的性能. 这种天然添加剂增强了循环稳定性和库伦比克效率,为商业化铺平了道路.
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:
- 水性离子电池 (AZIB) 面临着树突和副作用的挑战,限制了循环稳定性和商业可行性.
- 开发有效的电解质添加剂对于克服AZIB技术中的这些局限性至关重要.
研究的目的:
- 研究l-theanine作为天然电解质添加剂的潜力,以提高AZIB的性能.
- 阐明l-theanine提高阳极稳定性并抑制不良副作用的机制.
主要方法:
- 在对称细胞,半细胞 (Zn//Cu) 和全细胞 (Zn//V2O5) 中利用l-theanine作为电解质添加剂.
- 分析了l-theanine对沉积形态的影响,抑制副作用反应 (进化,腐蚀) 和电化学性能 (循环稳定性,库伦比效率).
主要成果:
- 在 (002) 晶体平面上,L-theanine引导均的Zn2+沉积,抑制树突和副作用.
- Zn//Zn对称细胞实现了1093小时的稳定循环 (14.4倍改进).
- 在267个循环中,Zn//Cu半电池的平均库伦比效率为97.6%,Zn//V2O5全电池在4000个循环中表现出稳定性,在广泛的温度范围内保持出色的容量.
结论:
- 氨酸是一种高效且可行的电解质添加剂,用于稳定AZIBs.
- 这些发现为通过改进的电解质设计推进高性能AZIB商业化提供了一个有希望的战略.
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