平衡层间距,孔隙结构和导电性,使硬碳具有可充电电池的高容量
Shuang Li1, Zeyu Zhang2, Fei Yuan2
1Hebei Vocational University of Industry and Technology, Shijiazhuang 050000, China. gzdwangzhen@126.com.
Physical chemistry chemical physics : PCCP
|June 4, 2024
概括
用添加的硬碳 (P-M) 通过改善层间距和导电性来增强可充电电池 (RAB). 这种优化的阴极提供了高容量和延长周期寿命,指导了未来的硬碳开发.
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) 是可充电电池 (RAB) 的一个有前途的阴极材料,因为它具有很大的层间距和多孔结构.
- 然而,同时优化孔隙结构,层间距和导电性仍然是实现高电化学性能的挑战.
研究的目的:
- 在低温 (700°C) 下合成N-化硬碳 (P-M),并研究其作为RAB改进阴极的潜力.
- 探索N-doping在增强结构性质和电化学性能方面的作用.
主要方法:
- 在700°C下合成N-化硬碳 (P-M).
- 结构性质的表征,包括层间间距和孔隙结构.
- 在RAB中测试PM作为阴极的电化学测试,评估容量和循环稳定性.
主要成果:
- N-doping扩大了层间间距,并创造了丰富的孔隙结构,增强了离子储存和电子转移.
- 与高温化HC (900°C) 相比,P-M阴极表现出更好的导电性,促进更快的离子扩散.
- 优化的P-M阴极在500 mA g-1下达到323 mA hg-1的高容量,并在1000个循环后在1 A g-1.1下保持109 mA hg-1的高容量.
结论:
- N-doping是一种有效的策略,可以提高RAB硬碳阴极的性能.
- 米材料表现出优越的容量和循环稳定性,为先进的储能解决方案提供了一个有前途的途径.
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