片状喷MWCNT的核心外结构作为离子电池的独立无粘合剂电极
Seyed Ali Hoseini1, Shams Mohajerzadeh2, Zeinab Sanaee3
1Thin Film and Nano-Electronic Lab, School of Electrical and Computer Eng., University of Tehran, 14395-515, Tehran, Iran. ali.hoseini@ut.ac.ir.
Scientific reports
|January 29, 2025
概括
核心外/多壁碳纳米管提供了改进的离子电池阳极. 本研究介绍了一种简单的制造方法,为基阳极提供高容量和稳定性.
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:
- 阳极由于其高容量,对离子电池来说是有前途的.
- 体积膨胀和结构降解限制了阳极性能.
- 开发稳定和高性能阳极仍然是一个关键的挑战.
研究的目的:
- 为了合成核心外/多壁碳纳米管 (Si/MWCNT) 阳极材料.
- 研究Si/MWCNT阳极的电化学性能和结构稳定性.
- 开发一种易于制造无粘合剂阳极的制造方法.
主要方法:
- 通过等离子增强化学蒸汽沉积 (PECVD) 和喷合成的核心外Si/MWCNT结构.
- 在当前收集器上直接种植的对齐的MWCNT.
- 电化学测试包括容量,速率能力和循环稳定性.
- 电子显微镜用于结构分析.
主要成果:
- 在C/5速率下达到3250 mAh/g的重力特异容量.
- 经过700多个循环后,表现出99.8%的出色容量保留.
- 在长时间循环过程中保持电极完整性和稳定性.
- 制造的独立的,没有粘合剂的电极.
结论:
- 基于PECVD的Si/MWCNT核心外结构有效地适应了的体积膨胀.
- 导电性MWCNT支架可以防止粉碎和分层,提高稳定性.
- 这种方法为离子电池的高性能,无粘合剂的阳极提供了一个简单,廉价的途径.
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