棒状Ni-CoS2@NC@C:结构设计,异原子注和碳封闭工程,以协同提高储存性能
Qingping Li1, Peng Wang1, Yuxiang Chen1
1College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China.
Journal of colloid and interface science
|March 14, 2024
概括
这项研究开发了用于增强离子电池阳极的双碳受限Ni-doped CoS2微极. 创新的设计提高了结构稳定性和储存性能.
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:
- 转换型过渡金属硫化物由于其高容量,是离子电池的有希望的阳极.
- 挑战包括在离子循环过程中体积膨胀和结构不稳定.
- 开发稳定和高性能阳极对于推进离子电池技术至关重要.
研究的目的:
- 设计和合成空间上双封闭的Ni-doped CoS2@NC@C微棒.
- 为了提高转化型过渡金属硫化物的储性能.
- 解决电池阳极体积膨胀和结构不稳定的问题.
主要方法:
- 使用结构设计和碳封闭的Ni-doped CoS2@NC@C微棒的合成.
- 材料的结构,形态和电化学性质的表征.
- 在离子电池中作为阳极的材料的电化学测试.
主要成果:
- Ni-CoS2@NC@C微棒表现出极好的循环稳定性,在250个循环后保持526.6 mAh g-1在1 A g-1.
- 观察到优越的速率能力,其容量为410.9 mAh g-1 在5 A g-1.
- 实现了特殊的长期循环性能,在5A g-1的1500个循环后提供502.5 mAh g-1.
结论:
- 在空间上具有双重限制的Ni-doped CoS2@NC@C微条有效地减轻体积膨胀并增强结构稳定性.
- 尼兴奋剂提高电导率,促进Na+扩散,提高电化学性能.
- 这一全面的战略为开发用于离子电池的高性能阳极提供了一个有希望的方法.
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