对于20Ah级水性电池的阴离子中介孔复合体
Lipeng Wang1, Bao Zhang2, Wanhai Zhou1
1Laboratory of Advanced Materials, Aqueous Battery Center, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Shanghai Wusong Laboratory of Materials Science, Electron Microscope Center of Fudan University, Faculty of Chemistry and Materials, Fudan University, Shanghai, 200433, P.R. China.
Angewandte Chemie (International ed. in English)
|March 21, 2025
概括
研究人员开发了一种新的阴离子在介质复杂化学物质,用于先进的基于的水性电池 (ZAB). 这项创新有效地抑制了树的生长和水的退化,使得稳定,高容量的储能解决方案成为可能.
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:
- 基于金属的水性电池 (ZAB) 提供安全的能量存储,但面临副作用和树生长的挑战,限制了实际应用,特别是在Ah级.
- 开发稳定和高性能ZAB对于下一代储能解决方案至关重要.
研究的目的:
- 引入一种新的阴离子-在-介质体 (CiM) 复杂化学物质,用于构建高容量的ZAB.
- 为了解决金属 Zn 阳极中树突扩散和副作用的局限性.
主要方法:
- 利用分子动力学和X射线吸收近边缘结构 (XANES) 分析来研究Zn2+在单介质SiO2 (smSiO2) 中的限制.
- 采用现场电化学数字全息,现场接口里埃变换红外光谱和H键密度分析来研究接口机制.
- 制造并测试了20Ah级Zn//VO2袋式电池.
主要成果:
- smSiO2有效地捕获Zn2+,形成Zn2+-smSiO2复合体,这些复合体迁移到Zn阳极.
- 这些复合物有助于形成稳定的接口,破坏水的聚合,抑制H2O降解和树的生长.
- 阳极在放电深度为55%的情况下,在800小时内表现出稳定的循环运行.
- 20Ah级Zn//VO2袋式电池在0.2Ag-1时达到20.5Ah,在1Ag-1时达到8.59Ah的容量,能量密度为65Whkg-1和96WhL-1.
结论:
- 拟议的阴离子在介质体中复杂化学物质为开发稳定和高性能Ah级ZAB提供了新的范式.
- 这种方法有效地减轻了Zn阳极的关键问题,为更可持续和可靠的能源存储铺平了道路.
- 这些发现代表了水性电池领域的重大进步.
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