铁电小分子使高性能离子电池成为可能
Lixin Song1, Ruizhe Zhang1, Zhiyong Liao1
1State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China. hqfan@nwpu.edu.cn.
Materials horizons
|July 28, 2025
概括
铁电添加剂通过抑制腐蚀和树的生长来稳定水性离子电池. 这提高了阳极的性能,并使灵活的储能解决方案成为可能.
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:
- 水性离子电池面临着诸如阳极腐蚀,进化和树增长等挑战.
- 稳定阳极接口对于电池的寿命和安全至关重要.
研究的目的:
- 引入四甲基甲酸盐 (TEACC) 作为铁电添加剂,以提高水性离子电池的性能.
- 研究TEACC修改电极-电解质接口并抑制有害反应的机制.
主要方法:
- 在水性电解质中用TEACC添加剂对阳极进行电化学测试.
- 对界面结构和固体电解质相间 (SEI) 形成的分析.
- 对实践应用的全细胞和柔性囊细胞的评估.
主要成果:
- TEACC创建了一个缺水的接口,转移的进化潜力,抑制水的活动.
- 形成一个稳定的SEI (ZnCO3,ZnCl2,ZnS) 促进可逆涂/剥离,高达99.5%的库伦比效率.
- TEACC的铁电性质使离子分布均,抑制树突,并将核化过电位减少35mV.
- 完整电池在380个循环后实现了92.94%的容量保留,并显示出出色的速率能力.
- 灵活的袋式电池成功为多个LED指示器供电.
结论:
- TEACC有效地稳定了水性电解质中的阳极接口.
- 铁电分子添加剂为先进的水性电池系统提供了一个有希望的策略.
- 开发的系统显示了灵活和高性能储能设备的潜力.
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