一种基于的离子电池的现场热交叉连接粘合剂
Jiashuang Wang1, Tongyu He1, Panpan Li1
1State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, Ningxia, China.
Journal of colloid and interface science
|June 30, 2023
概括
一种新型的植物酸-多酸 (PA@PAA) 粘合剂通过创建一个动态网络来增强离子电池 (LIB) 的阳极. 这提高了稳定性和容量,为高能量密度的LIB铺平了道路.
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) 提供高容量,但受到体积膨胀和电导率差的影响.
- 现有的粘合剂难以适应的体积变化,限制了电池的性能和寿命.
研究的目的:
- 为LIBs中的阳极开发一种新的现场热交叉连接粘合剂.
- 为了提高阳极的机械稳定性和电化学性能.
主要方法:
- 一种在现场交叉连接策略,使用植物酸 (PA) 和聚烯酸 (PAA) 形成一个动态的绑定器网络.
- 加入石墨烯氧化物 (GO) 来保护颗粒并提高初始效率 (ICE).
- 热处理温度的优化和Si@PA@PAA-220电极的电化学性能评估.
主要成果:
- PA@PAA结合剂通过结和结进行交联,有效消散机械应力.
- 在510次循环后,Si@PA@PAA-220电极在0.5 A/g下实现了1322.1 mAh/g的高可逆特异容量.
- 粘合剂积极参与电化学过程,稳定固体电解质接口 (SEI) 层.
结论:
- 在现场开发的交叉连接策略显著提高了阳极的稳定性和性能.
- 这种方法为开发使用阳极的高能量密度离子电池提供了有希望的解决方案.
- 动态粘合剂网络有效地减轻了与体积扩张相关的挑战.
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