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在MXene电流采集器上增强Zn沉积可逆性,通过形成ZnF2-含有固体电解质间相,用于无阳极金属电池
Chaofan Chen1, Rui Guo1,2,3, Swapna Ganapathy1
1Department of Radiation Science and Technology, Delft University of Technology, Delft, 2629 JB, The Netherlands.
Small (Weinheim an der Bergstrasse, Germany)
|January 28, 2025
概括
这项研究通过使用Ti3C2Tx MXene电流采集器与新型电解质来增强无阳极水性金属电池. 结合盐和烯碳酸盐添加剂,可以提高板的均性和电池性能.
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:
- 没有阳极的水性金属电池 (AZMB) 是低成本,环保的储能电池.
- 与传统金属相比,Ti3C2Tx MXene作为电流收集器具有优势.
- 沉积可逆性的挑战限制了独立的MXene电流采集器的使用.
研究的目的:
- 调查Ti3C2Tx独立片作为AZMB当前收集器的使用情况.
- 探索先进的电解质工程,使用盐和碳酸 (PC) 添加剂来改善涂.
- 解决AZMB中独立的MXene电流收集器尚未探索的领域.
主要方法:
- 制造一个Ti3C2Tx自立膜.
- 对电解质添加剂 (盐和PC) 的系统研究及其对沉积的联合影响.
- 分析固体电解质介相 (SEI) 层的形成和介面动力学.
- 电化学循环评估库伦比效率 (CE) 和可逆性.
主要成果:
- 盐添加剂本身就阻碍了Ti3C2Tx的均化.
- 仅PC添加剂就会导致有机SEI形成和聚合.
- 含有ZnF2的混合SEI层,由Li-盐和PC结合而形成,显著改善了接口动力学.
- 优化的电解质使沉积均,在150个循环中平均达到96.8%的CE.
结论:
- 量身定制的电解质设计对于优化MXene电流收集器上的沉积至关重要.
- 盐和PC添加剂的组合是提高AZMB性能的可行策略.
- 这项工作克服了先前在独立的MXene薄膜上板可逆性的局限性.
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