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在高能量密度离子电池中的Si阳极的交叉连接粘合剂

Jin-Xin Xue¹, Si-Xin Jia¹, Tian-Qi Xiang¹

¹Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.

ACS applied materials & interfaces

|July 15, 2024

概括

一种新的可交叉链接的粘合剂改善了用于高能离子电池的阳极. 这种粘合剂增强了弹性和粘附性,通过防止粉碎和促进稳定的固体电解质介相 (SEI) 来提高循环性能和稳定性.

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:

阳极为离子电池 (LIB) 提供了高的理论容量.
在化过程中显著的体积膨胀限制了阳极性能和周期寿命.
结合剂的选择对于减轻阳极降解至关重要.

研究的目的:

为阳极开发一种新的可交叉链接的粘合剂.
提高LIBs中的阳极的电化学性能和稳定性.
研究结合剂改善阳极完整性的机制.

主要方法:

合成一种具有基和基组的结合剂,用于在位共价交联.
使用交叉连接粘合剂 (c-POAH) 制造的SIDASIADASIALi半硬币细胞.
电化学测试 (在0.2°C的循环性能),扫描电子显微镜 (SEM) 和X射线光电子光谱 (XPS).

主要成果:

该c-POAH粘合剂表现出高弹性和对颗粒和电流收集器的强粘合.
在0.2°C的100个循环后,SijidokidokiLi细胞表现出极佳的循环性能,容量保持率为67.1%,在0.2°C的100个循环后保持了67.1%.
SEM图像显示了阳极粉碎的抑制,而XPS显示了更稳定的固体电解质介相 (SEI),这是由于电解质分解的缓解.

结论:

结合剂的现场交叉链接为开发高性能阳极提供了新的战略.
该c-POAH粘合剂有效地解决了阳极中体积扩张的挑战.
这种方法促进了阳极在高能量密度LIBs中的应用.

关键词:

这是一个Si阳极.粘合剂粘合剂粘合剂在现场交叉连接.离子电池是一种离子电池.聚烯酸酸盐是一种多烯酸盐.

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