对于稳定的阳极的铁电波性多孔聚合物涂层中3D打印诱导的相变
Hongcheng Zhang1, Guoyin Zhu1, Jingqi Lu1
1Institute of Advanced Materials and Flexible Electronics (IAMFE), School of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Nanjing, 210044, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|December 10, 2024
概括
研究人员开发了一种3D打印的铁电多孔聚合物层,用于保护水性离子电池 (AZIB) 中的阳极,防止树突的形成并改善电池寿命和性能.
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:
- 水性离子电池 (AZIB) 由于的丰富性和环保性,提供了可持续的储能解决方案.
- 阻碍AZIB发展的关键挑战包括树突的形成和副作用,这些影响电池的稳定性和寿命.
研究的目的:
- 引入一种新策略来保护AZIB中的阳极.
- 通过减轻状体生长和副作用来提高AZIBs的电化学性能和循环稳定性.
主要方法:
- 在阳极表面上使用3D打印技术构建了一个铁电多孔PVDF-HFP保护层 (PH-ZF).
- PH-ZF层的特点是其结构和特性,重点是高含量的β相PVDF-HFP,在没有后处理的情况下实现.
- 研究了保护层调节离子度并促进均的Zn2+沉积的能力.
主要成果:
- 具有PH-ZF层的对称AZIB证明了在0.5mA cm-2下延长周期寿命的1200小时和在1.0mA cm-2.2下延长周期寿命的2000小时.
- 使用MnO2阴极的全AZIB在1.0 A g-1的1000个循环后表现出大约88.3 mA g-1的排放特异容量,显著超过裸阳极 (51 mAh g-1).
- 铁电性多孔聚合物层有效地抑制了树的形成和副作用.
结论:
- 3D打印的铁电多孔PVDF-HFP层为AZIB中的阳极保护提供了有效和简化的方法.
- 这种方法显著提高了AZIB的循环稳定性和电化学性能,为其实际应用铺平了道路.
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