超级电容器使用棉花外衍生的活性炭和多孔聚合物电解质薄膜
Saurabh Singh1, Yulin Zhang2, S A Hashmi3
1Materials Program, Department of Chemical and Materials Engineering, University of Kentucky Lexington KY 40506 USA ssi303@uky.edu.
RSC advances
|April 2, 2025
概括
这项研究改进了电气双层电容器 (EDLC),使用具有成本效益的,环保的棉花外衍生的活性碳. 新的超级电容器提供了更好的能量密度和稳定性,为更绿色的能源解决方案铺平了道路.
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
- 绿色化学 绿色化学
背景情况:
- 超级电容器,特别是电气双层电容器 (EDLC),面临着能源密度低和成本高等挑战,阻碍了市场采用.
- 尽管面临挑战,EDLCs具有出色的电化学特性,包括高功率密度和循环稳定性.
- 开发具有成本效益和可持续的材料对于推进EDLC技术至关重要.
研究的目的:
- 通过开发高性能,具有成本效益和环保的方法来克服当前EDLCs的局限性.
- 利用生物废物,特别是棉花,制造EDLC的活性碳材料.
- 通过新型材料设计和电解质选择,提高EDLC的电化学性能.
主要方法:
- 棉花被转化为活性炭 (ZnACs),使用1:2质量比的ZnCl2激活.
- 制造的EDLC使用了ZnAC作为电极和由聚烯和聚乙烯-co-hexafluoropropylene组成的多孔聚合物电解质 (PPE) 薄膜.
- 电化学性能通过特定电容,能量密度,功率密度,库伦比效率和循环稳定性测试进行评估,并与商业活性碳进行比较.
主要成果:
- ZnACs表现出高的BET表面积 (2031 m2 g-1) 和层次的多孔结构,促进更快的离子扩散.
- 这些EDLC在0.52Ag-1下达到247.82Fg-1的高特异电容.
- 个人防护设备提供了广泛的潜在窗口 (∼7.22 V vs. Ag) 和高导电性 (1.51 mS cm-1),导致高能量密度 (∼22.58 W h kg-1) 和库伦比效率 (∼83.6%).
- EDLCs表现出了显著的循环稳定性,在10,000个循环后,电容仅有~3%的色.
结论:
- 使用来自棉花的活性炭为高性能EDLC提供了一条可持续且具有成本效益的途径.
- 这种方法解决了与生物废物处理相关的环境问题,同时提高了储能能力.
- 开发的EDLCs由于其优异的电化学性能和稳定性,显示出在绿色能源技术中应用的巨大潜力.
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