MAX 阶段纯度随机层间距调节 Ti3C2-F MXene 电极用于高效的能量存储应用程序
Ekta Choudhary1,2, Manopriya Samtham1, Rishav Sharma1
1Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Indore, Khandwa Road, Simrol, Indore, 453552, India.
Small (Weinheim an der Bergstrasse, Germany)
|April 7, 2025
概括
更高纯度的MAX相会导致MXene质量和电化学性能的提高. 这项研究表明,增加MAX相纯度可以显著提高MXene层间间距和能量储存能力.
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:
- 在MAX相中因杂质引起的缺陷会对衍生的MXene质量产生负面影响.
- 这些缺陷会破坏离子运输通路,阻碍电化学性能.
- MAX相纯度是影响MXene特性的一个关键因素.
研究的目的:
- 系统地研究MAX相纯度对MXene质量的影响.
- 了解杂质引起的缺陷如何影响MXene的电化学性能.
- 探索增强基于MXene的储能系统的战略.
主要方法:
- 合成和描述不同纯度级别的MAX相.
- 从MAX阶段导出MXenes,并分析结构性质.
- 电化学测试包括静电电荷放电 (GCD) 和循环电压测量.
- 对称电池类型超级电容器设备的制造和评估.
主要成果:
- 将MAX相纯度从47%提高到99%,导致MXene间层间距扩大.
- 随着更高的MAX相纯度 (121.86至680.8Fg-1),MXene的特定电容显著改善.
- 加入碳黑 (CB) 进一步增强了特定电容,达到918.5 F g-1.
- 超级电容器设备表现出高的特定容量 (76.54 mAh g-1),能量密度 (55.58 Wh kg-1),以及功率密度 (1500.27 kW kg-1).
- 设备表现出极好的循环稳定性,在5000个循环后保持94%的电容.
结论:
- 对于控制MXene层间距和电化学性能而言,MAX相纯度至关重要.
- 高纯度的MAX相对于开发先进的基于MXene的储能器件至关重要.
- 这项工作通过精确控制前体材料质量,为设计高性能混合动力储能系统提供了一条途径.
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