稳定的阳极由再生丝纤维素修饰的凝保护层促进
Peixian Huo1, Xing Ming2, Yueyang Wang1
1Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau SAR, 999078, China.
Small (Weinheim an der Bergstrasse, Germany)
|April 11, 2024
概括
使用PVA和丝纤维素 (SFs) 的新型细胞膜启发的保护层有效地稳定了离子电池 (ZIBs) 中的阳极. 这一创新抑制了树的生长,提高了电池的寿命和性能.
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:
- 离子电池 (ZIB) 面临的局限性是由于水性电解质中的阳极接口不稳定,导致树的生长和副作用.
- 这些问题阻碍了ZIB的实际应用和长期稳定性.
研究的目的:
- 为阳极开发一种模仿细胞膜结构的保护层,以提高接口稳定性和ZIB性能.
- 为了研究树突抑制的机制和保护层提供的增强的可逆性.
主要方法:
- 使用聚乙醇 (PVA) 作为框架和丝纤维蛋白凝悬浮液 (SFs) 作为阳极的修饰剂,构建了一个类似凝的保护层.
- 修改后的阳极 (PVA/SFs@Zn) 进行了表征,其性能在对称细胞和全细胞 (PVA/SFs@Zn) 中进行了评估.
主要成果:
- 该PVA/SFs层优化了阳极-电解质接口和Zn2+溶解结构,有效地抑制了树突的生长和副作用.
- PVA/SFs@Zn对称细胞表现出延长寿命 (3150小时与裸Zn的182小时相比) 具有高库伦比效率 (99.04%).
- 完整电池表现出了显著的稳定性,在高电流密度下20,000个循环后保持超过80%的容量保留.
结论:
- 经过SF修改的保护层为稳定ZIB中的阳极提供了强大而持久的解决方案.
- 这一战略显著提高了离子电池的可逆性,寿命和整体性能,为可靠的能量存储铺平了道路.
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