类似的化促进利用Sb在Sb纳米粒子和N-化碳复合材料中的Sb,以增强储存
Ruiying Zhang1, Huichun Xue2, Tunmise Ayode Otitoju3
1Department of Chemistry, College of Science, Northeastern University, Shenyang, Liaoning 110819, P. R. China.
ACS applied materials & interfaces
|July 26, 2024
概括
通过类似化稳定用添加碳稳定的抗纳米粒子通过防止聚合和增强结构稳定性来改善离子电池的性能. 这种新的方法提高了阳极材料的利用率和电化学动力学.
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
- 纳米技术 纳米技术
背景情况:
- (Sb) 是离子电池 (PIB) 的一个有前途的阳极材料.
- 在循环过程中,Sb阳极遭受聚合,导致性能差和结构退化.
- 开发维持Sb纳米结构和活跃站点的策略对于高性能PIB至关重要.
研究的目的:
- 为高性能离子电池合成一种稳定的以反为基础的阳极材料.
- 为了研究使用类似的化与添加碳以防止Sb聚合的使用.
- 阐明电化学性能增强背后的机制.
主要方法:
- 使用类似化方法制造Sb@CTF-NC混合材料.
- 使用 (N) 作为中间体形成Sb-N-C/Sb-NC共价键.
- 使用现场表征来研究反应机制.
- 执行密度函数理论 (DFT) 计算以了解动力学.
主要成果:
- 类似的化策略有效地抑制了Sb聚合,并保持了纳米尺寸的Sb.
- 该Sb@CTF-NC混合材料表现出增强的结构稳定性和积极的现场利用.
- 现场表征证实了Sb-N-C/Sb-NC共价键的形成.
- DFT计算表明吸附能量增加和K+扩散屏障降低,加速反应动力学.
结论:
- 这种Sb@CTF-NC混合材料作为PIBs的阳极表现出色.
- 模拟化是稳定Sb纳米颗粒在PIBs中的一个可行的策略.
- 化碳网络在增强电化学动力学和稳定性方面发挥着至关重要的作用.
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