基于物理化学双交联的高强度和分层压力散射结合剂,用于高性能阳极
Yang He1, Feng Zhou1, Yingxi Zhang1,2
1Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
ACS applied materials & interfaces
|April 1, 2025
概括
一种由聚烯酸和交联聚氨制成的新型粘合剂改善了离子电池的阳极. 这种材料增强了结构完整性和电池性能,使寿命更长,能量密度更高.
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
- 电池技术 电池技术
背景情况:
- (Si) 阳极为离子电池 (LIB) 提供高容量.
- 在循环过程中体积膨胀会导致Si阳极的降解,并限制实际使用.
- 开发强大的结合剂对于稳定的Si阳极性能至关重要.
研究的目的:
- 为阳极开发一种高强度,压力分散的粘合剂.
- 提高阳极的结构完整性和循环稳定性.
- 为了提高下一代离子电池的性能.
主要方法:
- 通过共价键和键合成了一种双交联结合剂 (CPU-PAA).
- 标志着粘合剂的特性,包括性和抗拉强度.
- 在Si阳极上进行了电化学循环测试和有限元素分析 (FEA).
主要成果:
- 该CPU-PAA粘合器表现出高性和分层压力消散.
- FEA证实了CPU-PAA的Si阳极中压力分布的减少和均.
- 带有CPU-PAA粘合剂的Si阳极在5Ag-1.1,在150个循环后保持了82.3%的容量.
- 使用Si/CPU-PAA阳极的全电池表现出稳定的循环性能.
结论:
- 该CPU-PAA绑定器有效地减轻Si阳极体积扩张问题.
- 这种粘合剂设计增强了结构完整性和电化学稳定性.
- 开发的绑定器显示了高能量密度LIBs的巨大潜力.
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