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用于高容量和稳定的离子电池的正极材料的补充膨胀石墨

Ying Yang^1,2, Ruirui Zhao², Yong P Chen^1,3,4,5

¹Department of Engineering Science, Faculty of Innovation Engineering, Macau University of Science and Technology Av. Wai Long Macao SAR 999078 China yangying632882@126.com.

|August 1, 2024

概括

补充扩展石墨通过增加容量和稳定性来提高离子电池的性能. 这种新的阴极材料为下一代储能设备提供了一个有前途的解决方案.

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:

离子电池 (AIBs) 正因为其可靠且具有成本效益的Al金属阳极而引起人们的注意.
石墨是AIB的有希望的阴极材料,但其低容量阻碍了实际应用.

研究的目的:

为了提高AIBs的石墨基阴极的电化学性能.
调查兴奋剂对扩张石墨结构和特性的影响.

主要方法:

用添加扩展石墨 (B-EG) 通过热处理扩展石墨和酸来合成.
使用结构和电化学特性技术来评估B-EG材料.

主要成果:

B-doping扩大了层间的间距,并在石墨中引入了半孔结构.
B-EG电极在500mAg-1.1时显示出高特异容量84.9mAhg-1的高特异容量.
B-EG表现出更好的循环稳定性,在300个循环后保持87.7 mA hg-1.

结论:

兴奋剂有效地增强了AIBs扩张石墨中的离子转移和吸附.
与原始扩展石墨相比,B-EG阴极提供了优越的速率能力和循环稳定性.
这项工作为开发离子电池的高性能阴极材料提供了一个可行的策略.

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