由高稳定阳极的梯度固体电解质间相诱导的晶体重定向.
Ming Zhao1,2, Yanqun Lv1, Jun Qi2
1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310058, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|November 16, 2024
概括
一种新型的梯度固体电解质介相 (SEI) 促进了的均沉积,并抑制了电池中的树突. 这一突破提高了电池寿命和稳定性,以实现长期的性能.
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:
- 水性金属电池对可持续的储能充满希望.
- 了解阳极界面反应对于电池性能至关重要.
- 树的生长和腐蚀限制了金属阳极的寿命.
研究的目的:
- 为了阐明沉积在阳极上的反应途径.
- 研究梯度固体电解质间相 (SEI) 在控制沉积中的作用.
- 为了提高金属阳极的稳定性和循环性能.
主要方法:
- 在阳极上制造一个梯度SEI层.
- 分析SEI组成 (B-O和C物种) 和结构.
- 对称和不对称的电池 (Zn//Zn, Zn//Cu, Zn//I2) 的电化学测试.
主要成果:
- 梯度SEI促进单晶核的优先形成和密集的Zn(002) 沉积.
- 由于SEI.观察到增强的Zn2+核化速率和减少的核大小.
- 稳定循环,具有>99.5%的可逆性,在Zn//Cu电池中超过5000个循环,在无阳极Zn//I2电池中超过3000个循环.
结论:
- 梯度SEI有效地抑制了树突的生长和金属腐蚀.
- 晶体重定向到Zn(002) 平面,确保了统一的涂层/脱落.
- 这一策略显著提高了水性金属电池的长期稳定性和性能.
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