双功能的Ca使离子电池中的硬碳具有高化动力
Ying Li1, Jing Shi1, Feng Wu1,2
1Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
ACS applied materials & interfaces
|January 5, 2024
概括
研究人员使用Hovenia dulcis和开发了一种用于离子电池 (SIB) 的新型硬碳阳极. 这种材料显著提高了储存动力学和高级电池应用的高速性能.
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:
- 硬碳 (HCs) 是离子电池 (SIB) 的阳极材料.
- 它们复杂的微观结构阻碍了有效的离子 (Na+) 扩散,限制了高速率的性能.
- 开发具有增强化动态的HC对于SIB进步至关重要.
研究的目的:
- 为了设计一种由Hovenia dulcis衍生的硬碳 (HC),改进了储存动力学.
- 通过结构修改来提高SIB阳极的高速性能.
- 调查双功能在优化HC结构和电化学性质中的作用.
主要方法:
- 合成一种来自Hovenia dulcis的硬碳.
- 硬碳与 (Ca) 的双重功能化.
- 用于SIB阳极的修改HC的结构和电化学特性.
主要成果:
- 兴奋剂扩大了层间的间距,并创造了具有内在缺陷的层次性毛孔结构.
- 这些修改提供了增强的Na+扩散通道和增加的活性位点.
- 优化的HC显示了350.3mAhg-1的可逆容量在50mAg-1和95.3%的容量保留1000个循环后.
- 证明了出色的速率能力,108.4 mAh g-1 在2 A g-1.
结论:
- 双功能显著提高了Hovenia dulcis衍生的硬碳的化动力学和高速性能.
- 结构性监管的协同效应促进了SIB的广泛使用.
- 这项研究提供了有关为先进的储能应用量身定制高温电池结构的见解.
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