自动激活和自填充工程,以调节碳素甲基基/Pitch衍生的硬碳的微结构,以增强离子存储
Nurbiye Sawut1, Lu Wang1, Jinting Li1
1Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
ACS applied materials & interfaces
|February 10, 2026
概括
一种新的低成本方法为离子电池创建了硬碳阳极,这些阳极具有改进的闭孔. 这提高了储存能力和效率,为电池开发提供了具有成本效益的解决方案.
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 (HC) 是离子电池 (SIB) 的关键阳极材料,因为它的容量和成本.
- 在HC中,闭孔对于高储存能力至关重要,但它们的合成通常是复杂和昂贵的.
研究的目的:
- 开发一种低成本,高效的策略,用于制造具有定制闭孔的硬碳阳极.
- 通过优化其微观结构来提高硬碳的储存性能.
主要方法:
- 对于来自carboxymethyl chitosan和pitch的硬碳,采用了预氧化策略.
- 高温碳化促进了同时形成孔隙,孔隙填充和层间间距扩张.
- 在现场使用拉曼光谱来研究储存机制.
主要成果:
- 优化的HC阳极显示可逆容量的显著增加,从90.0到352mAhg-1.1.
- 最初的库伦比克效率从64.2%提高到84%.
- 实现了出色的速度能力和循环稳定性.
结论:
- 开发的单步,自我激活和自我填充策略有效地生产具有受控闭孔的高容量硬碳阳极.
- 这种方法为先进的离子电池阳极材料提供了具有成本效益的途径,而不需要激活试剂.
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