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生物启发的聚离子电解质用于高度稳定的离子电池
Haobo Dong1,2, Xueying Hu2, Ruirui Liu3
1Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK.
Angewandte Chemie (International ed. in English)
|August 24, 2023
概括
酸酸涂层使离子电池 (ZIB) 能够均,显著提高了库伦比克效率 (CE) 和稳定性. 这种以生物质为灵感的方法提高了ZIB在实际应用中的性能.
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:
- 在离子电池 (ZIB) 中,不均的涂/剥离导致高极化和低库伦比效率 (CE),限制了它们的大规模应用.
- 开发稳定高效的阳极对于推进ZIB技术至关重要.
研究的目的:
- 为ZIB中的阳极开发高性能固体电解质介相 (SEI) 层.
- 为了提高涂/脱落的均性,并提高电池的整体性能.
主要方法:
- 使用阳离子聚电解质酸 (SA) 在阳极上在现场形成SEI.
- 研究SA对Zn2+离子亲和力,溶解结构和核化能量的影响.
- 组装Zn下载RadiusCu电池和袋式电池以评估电化学性能,包括CE和容量保留.
主要成果:
- 由于Zn2+离子对酸离子组的亲和力,SA涂层诱导了一条为均涂层提供良好对齐的通道.
- 该SEI层调节了Zn2+溶解,并促进了紧的Zn (002) 水晶平面的形成.
- 用SA涂层的 Zn 阳极表现出稳定的剥离/涂层,电位差小 (0.114 V),即使在高深度放电 (DOD) 中也是如此.
- 对SA涂层Zn的核化能量减少了97%,导致核化速度更快.
- 在1400个循环中,ZnBodyCodeCu细胞平均获得了99.8%的CE.
- 使用SA涂层Zn阳极的囊细胞显示96.9%的容量保留,而在高阴极质量负荷下,裸体Zn阳极的容量保持率为59.1%.
结论:
- 酸是一种有效的材料,用于在ZIB中的阳极上创建高性能SEI层.
- 由SA引发的SEI层显著提高了ZIB的稳定性和库伦比效率.
- 这种以生物质为灵感的战略为高性能ZIB的实际应用提供了一个有希望的途径.
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