双碳相封装预化SiOx微棒阳极用于离子电池
Yulin Fu1,2,3, Dongxia Li1,2,3, Xiangfeng Sun1,2,4
1Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|May 21, 2024
概括
本研究介绍了离子电池的创新性子氧化 (SiOx) 阳极,采用了一种新的预化策略. 新的SiOx@C阳极提供了高容量和稳定性,这对于下一代能源存储至关重要.
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:
- 基于的阳极对离子电池是有希望的,因为它们的理论容量很高.
- 非静电测量亚氧化物 (SiOx) 具有重要的商业潜力.
- 现有的阳极预化方法通常需要危险材料,如金属.
研究的目的:
- 为了展示一个创新的SiOx@C阳极设计与无金属的预化策略.
- 为了创建氧化碳 (SiOC) 纳米域的双碳封装.
- 为了提高阳极的电化学性能和稳定性.
主要方法:
- 一步热处理,同时进行前化和碳封装.
- 在现场对盐的pyrolysis of silsesquioxane trisilanolate进行化,以便进行化.
- 使用富含的有机和聚烯二作为内部和外部碳来源.
主要成果:
- 该L2-SiOx@C材料实现了高初始库伦效率的80.4%.
- 在500个循环后,在0.5 A g-1.1时,异常容量保持率为97.5%.
- 记录了654.5mAhg-1的可逆特定容量.
结论:
- 开发的SiOx@C阳极为离子电池提供了稳定,高性能和环保的替代方案.
- 无金属预化策略简化了制造过程,提高了安全性.
- 双碳封装有效地减轻了体积膨胀,并改善了循环稳定性.
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