净化球形石墨作为离子电池的阳极:对净化方法的比较研究
Tri Thien Vu1, Duong Duc La1, Long Vu Le1,2
1Institute of Chemistry and Materials, Hanoi 10000, Vietnam.
Micromachines
|July 27, 2024
概括
使用三步湿化学方法净化球形石墨可以显著提高其碳含量,达到99.9%以上. 这种精制的石墨材料显示了作为离子电池的阳极的性能提高.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 石墨对于离子电池阳极至关重要,需要高碳含量 (>99%).
- 球形石墨净化对于开发先进的阳极材料至关重要.
研究的目的:
- 研究用于净化球形石墨的湿化学方法.
- 评估净化对石墨的性能和电化学性能的影响.
主要方法:
- 对球形石墨应用了三种不同的湿化学净化工艺.
- 描述包括EDX,XRD,SEM和BET分析.
- 电化学性能使用循环电压计 (CV) 和静电电荷放电 (GCD) 来评估.
主要成果:
- 一个三步的H2SO4-NaOH-HCl净化过程使碳含量从90%增加到99.9%以上.
- 净化保持了石墨的结构和球形形态,增强了表面积.
- 净化石墨阳极的特异性容量为350 mAh/g,而未净化石墨的特异性容量为280 mAh/g.
结论:
- 湿化学净化在生产用于离子电池阳极的高纯度球形石墨方面是有效的.
- 优化的净化过程提高了电化学性能,从而提高了电池容量.
- 这项研究有助于开发用于储能应用的改进的阳极材料.
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