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防水离子屏障启用超耐用Zn (002) 平面导向向长寿命的阳极-少Zn电池
Guigui Liu1, Yongchao Tang1,2, Yue Wei3
1School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China.
Angewandte Chemie (International ed. in English)
|July 8, 2024
概括
使用基和Mn2+设计了一种"疏水离子屏障",以使水性Zn电池中稳定的剥离/板. 这一突破提高了电池的寿命和能量密度,为长时间的无阳极设计铺平了道路.
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:
- 水性电池 (AZBs) 遭受了逐渐的阳极降解和有限的日历寿命/能量密度,通常是由于高负/正电极 (N/P) 比率.
- 开发稳定和高性能AZB对于下一代储能解决方案至关重要.
研究的目的:
- 设计一种新的"疏水离子屏障",用于在AZB中进行超耐用的剥离/.
- 通过抑制树的生长并使其循环稳定,增强AZB的日历寿命和能量密度.
主要方法:
- 利用理论模拟来指导疏水离子离子屏障的设计.
- 作为固体阻碍剂和Mn2+作为电场屏蔽添加剂的纳入基 (ADN) 在无Zn2+的水合电解质中.
- 研究了Zn‖Zn对称细胞和没有阳极的Zn‖VOPO4·2H2O全细胞来评估性能.
主要成果:
- 设计的"疏水离子屏障"有效地抑制了 (002) 平面和树突的生长,使得无树突的 Zn 剥离/.
- Zn‖Zn对称细胞表现出异常稳定性,在0.5 mA cm−2下循环超过2150小时,在1 mA cm−2.2下循环超过918小时.
- 没有阳极的全电池在1Ag-1的842个循环后表现出75.2Wh kg-1的高能量密度,超过了传统设计.
结论:
- 强大的"疏水离子屏障"设计显著提高了AZB的耐用性和性能.
- 这种方法为开发具有长寿命,高能量密度的无阳极电池提供了一个有希望的新途径.
- 这些发现对推进实际的水性能量储存系统具有广泛的影响.
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