具有集成刚性和灵活性的键互锁导电聚合物网络:赋予碳阳极稳定的功能
Xinmeng Hu1,2, Wenhui Geng1,2, Zhicheng Xu1,2
1College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
ACS applied materials & interfaces
|July 30, 2025
概括
一种新的聚合物粘合剂 (PTR) 通过提高稳定性和耐用性来增强离子电池的碳阳极. 这一进步支持高能量密度电池的发展.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- -碳 (Si/C) 微粒是高能量密度离子电池 (LIB) 的阳极材料.
- 商业化受限于由于电池运行过程中的压力导致的界面稳定性和循环耐用性差.
- 这种压力源于化和脱化周期期间的体积变化.
研究的目的:
- 为Si/C阳极开发一种新的聚合物粘合剂 (PTR),以提高结构完整性和电化学性能.
- 调查双交联导电网在减轻应力和提高电极稳定性方面的有效性.
- 为下一代LIB推进Si/C阳极的可行性.
主要方法:
- 通过将聚烯酸 (PAA) 和碳氧化 styrene-butadiene (XSBR) 与酸 (TA) 交叉结合,制造一个 PTR 粘合剂.
- 加入碳氧化单壁碳纳米管 (SWCNTs) 来创建一个双交联导电网.
- 用PTR粘合剂对Si/C阳极进行电化学测试,并与传统粘合剂进行比较.
主要成果:
- 具有稳定的分子架构和双交叉连接网络的PTR粘合剂有效地减轻了扩张带来的压力.
- 电极保持了结构完整性,抑制了循环过程中有害的链滑动.
- 带有 PTR 粘合剂的 Si/C 阳极显著改善了容量保留和速率性能.
结论:
- 开发的PTR粘合剂为提高Si/C阳极的稳定性和耐用性提供了一个强大的解决方案.
- 这一策略有效地解决了与LIBs中的基阳极相关的机械挑战.
- 这些发现为先进的Si/C阳极在高能量密度离子电池中的实际应用铺平了道路.
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