一种坚固且自愈的半IPN水凝粘合剂,基于离子电池中Si阳极的多重动态键
Eseul Kang1,2, Juhui Hwang1,2, Sooyeon Kim1
1Department of Materials Science and Chemical Engineering, Hanyang University ERICA, Ansan 15588, Republic of Korea.
ACS applied materials & interfaces
|May 8, 2025
概括
这项研究引入了一种新型的半互穿透聚合物网络 (半IPN) 水凝作为离子电池中阳极的粘合剂. 先进的水凝粘合剂通过稳定体积变化来提高电池性能和寿命.
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
- 聚合物化学 聚合物化学
背景情况:
- 水凝作为离子电池中阳极的粘合剂被探索,因为它们的弹性和能够管理的体积膨胀.
- 传统的水凝往往缺乏要求高的电池应用所需的机械强度,导致降解.
研究的目的:
- 为离子电池中的阳极开发一种强大的,自我修复的水凝粘合剂.
- 为了提高阳极的电化学性能和循环稳定性.
主要方法:
- 使用酸 (AAc) 和甲基纤维素 (CMC) 网络制造半透聚合物网络 (半IPN) 水凝.
- 加入动态键 (B-N 协调乙烯和 Al3+ 金属协调) 以平衡自愈和机械强度.
- 描述水凝粘合剂与阳极的相互作用及其对固体电解质介相 (SEI) 的影响.
主要成果:
- 半IPN水凝粘合剂显示出出色的机械强度和自我愈合特性.
- 使用水凝粘合剂的阳极在延长循环期间显著改善了容量保留和稳定性.
- 在0.2°C的300个循环后,获得了1023.8 mAh g-1的可逆特异容量,而PVDF结合剂的308.3 mAh g-1.
结论:
- 开发的半IPN水凝粘合剂有效地减轻了阳极体积膨胀,并促进了稳定的SEI层.
- 这种先进的水凝粘合剂为离子电池中的阳极提供了优越的性能,与传统的粘合剂相比.
- 这些发现突显了基于动态键的水凝对下一代高性能电池的潜力.
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