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双交叉连接的聚乙胺/聚乙烯醇网络结合剂,可提高电池中基阳极的稳定性
Zhaohu Ba1, Zhenxing Wang1, Ke Xu1
1State Key Laboratory for Chemical Fibers and Polymer Materials. College of Materials Science and Engineering, Donghua University, No. 2999, North Renmin Road, Songjiang, Shanghai 201620, P. R. China.
ACS applied materials & interfaces
|March 18, 2025
概括
使用聚乙醇和聚乙烯胺的新双交联粘合剂系统增强了离子电池的阳极. 这稳定了体积变化,提高了循环稳定性,并保留了下一代储能能力.
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:
- 阳极为下一代离子电池提供了高的理论容量.
- 在循环过程中体积膨胀会导致阳极的容量降低.
- 开发稳定的结合剂对于实际的阳极应用至关重要.
研究的目的:
- 开发一个双交叉连接的粘合剂系统,以减轻阳极的体积膨胀.
- 为了提高阳极的机械稳定性和循环性能.
- 为了实现高容量和耐用的离子电池.
主要方法:
- 将聚乙醇 (PVA) 纳入聚乙胺 (PEI) 基质.
- 对于结构刚性的PEI矩阵的化学交联.
- 在PVA中利用可逆结合来消除应力.
- 使用开发的粘合剂系统对阳极进行电化学测试.
主要成果:
- 双交联结合剂有效地抑制了循环过程中的体积膨胀.
- 在200个循环中实现了2126mAh/g的高特异性容量,92.1%的保留率.
- 使用亚微米,展示了9.3 mAh/cm2的令人印象深刻的面积容量.
- 观察到增强的电极稳定性和机械完整性.
结论:
- 协同作用的双交叉连接粘合剂系统显著提高了阳极的耐用性和性能.
- 这种方法为开发高性能下一代离子电池提供了一个有前途的战略.
- 开发的粘合剂系统解决了阳极商业化的主要挑战.
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