构建WS2/NC@C纳米片复合材料作为离子电池的性能增强阳极
Chun Yuan1, Baolin Liu1, Hongyu Zhang1
1State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, P. R. China. caoyali523@163.com.
Nanoscale
|March 26, 2024
概括
这项研究开发了用于离子电池的WS2/NC@C复合材料. 该材料具有高容量和优良的循环寿命,推进了储能解决方案.
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:
- 层状金属硫化物对于离子电池 (SIB) 是至关重要的,因为它们具有稳定的结构和可访问的活性点.
- 开发先进的材料是提高SIB性能的关键.
研究的目的:
- 合成和描述一种用于增强离子存储的新型WS2/NC@C复合物.
- 评估WS2/NC@C复合材料在SIB和离子混合电容器 (SIHC) 中的电化学性能.
主要方法:
- 使用一种简单的液体混合方法,将WS2纳米片固定在N-化碳 (NC) 上,然后进行碳涂层,形成WS2/NC@C.
- 电化学性能使用静电循环,速率能力测试和循环电压测试进行了测试.
主要成果:
- 在200个循环后,WS2/NC@C复合材料在0.2A g-1下显示出369.8mA hg-1的高可逆容量.
- 观察到优异的速率性能,256.7和219.6mA的hg-1容量在1000个循环后保持在1和5Ag-1.
- 组装SIHC (AC//WS2/NC@C) 的能量密度为68 W h kg-1,在2000个循环后保持了82.9%的容量.
结论:
- WS2/NC@C复合材料为高性能离子电池和混合电容器提供了一个有前途的材料.
- 化碳和额外的碳涂层增强了分散,电荷转移和电化学稳定性.
- 这项工作为设计先进的离子能量存储层状金属硫化物的设计提供了宝贵的见解.
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