基于Ti的分层材料的高效表面被动化由非分支共聚物用于耐用和高功率的离子电池
Benoît D L Campéon1,2, Raizo Umezawa3, Alok K Pandey3
1Advanced Chemical Energy Research Center, Institute of Advanced Sciences, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku,Yokohama, Kanagawa 240-8501, Japan.
ACS applied materials & interfaces
|January 10, 2024
概括
一种新的聚烯烯) 接种聚乙烯醇) 共聚合物 (PVA-g-PAN) 粘合剂提高了离子电池的性能. 这种稳定的粘合剂提高了初始容量,速率能力和长期循环,以实现可持续的能源存储.
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:
- 可持续的能源发展需要高效,低成本的离子电池 (SIB).
- 聚乙烯化物 (PVDF) 是一种常见的SIB结合剂,但导致显著的不可逆转的容量损失.
- 需要使用具有更好的化学稳定性和电化学性能的替代粘合剂.
研究的目的:
- 评价一种新型的聚烯烯) 接种聚乙醇) 共聚合物 (PVA-g-PAN) 作为SIBs的粘合剂.
- 为了比较PVA-g-PAN与PVDF的电化学性能和化学稳定性.
- 研究PVA-g-PAN对基于Ti的负电极的结构和电化学优势.
主要方法:
- 合成和PVA-g-PAN共聚物的特征.
- 用金属结合剂的化学稳定性测试.
- 在SIB中复合电极的电化学性能测试.
- 使用软X射线光电谱和场辐射扫描电子显微镜进行表面分析.
主要成果:
- PVA-g-PAN对金属具有出色的化学稳定性,与经过脱的PVDF不同.
- 使用PVA-g-PAN的电极显示出改善的初始库伦比效率,更高的速率能力,以及超过1500个周期的稳定循环能力.
- PVA-g-PAN的分支结构促进了均的乙黑分布,增强了可涂性,并改善了基于Ti的氧化物被动化.
结论:
- 与PVDF相比,PVA-g-PAN是离子电池的优质粘合剂,提供更好的稳定性和电化学性能.
- 改进的电极结构和被动化有助于提高能量密度和耐用性.
- 这项研究为开发实用,高功率密度的离子电池提供了有希望的途径.
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