通过使用氧化还原介导的凝聚合物电解质来增强化碳化物的能量密度
Mustapha Balarabe Idris1, Bhekie B Mamba1, Fuku Xolile1
1Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida Science Campus 1710 South Africa idrisbm@unisa.ac.za.
RSC advances
|December 11, 2025
概括
研究人员开发了一种新的对称超级电容器,使用添加碳化物电极和氧化还原介导电解质. 这种进步大大提高了能量密度,并保持了出色的稳定性,用于实际应用.
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:
- 超级电容器由于狭窄的电压窗口和不足的氧化还原反应而受到低能量密度的限制.
- 用添加的半孔石墨碳化 (P-Mg-CN) 提供了提高电化学性能的潜力.
- 反氧介导电解质可以扩大电压窗口,并通过法拉代贡献增加电容.
研究的目的:
- 开发一个具有增强能量密度和长期稳定的对称超级电容器.
- 研究P-Mg-CN电极和氧化还原介导凝聚合物电解质 (R-mgpe) 的协同作用.
- 评估电化学性能,包括特定电容,能量密度,功率密度和循环稳定性.
主要方法:
- 制造 P-Mg-CN 电极.
- 使用基/基 (HQ/BQ) 氧化还原配对制备氧化还原介导的凝聚合物电解质 (R-mgpe).
- 一个对称的超级电容器装置的组装.
- 使用循环电压测量,静电电荷放电和电化学阻抗光谱在三电极配置和两电极装置中的电化学表征.
主要成果:
- 与H2SO4 (134 F g-1) 相比,P-Mg-CN电极在氧化还原电解质中显著增强了特定电容,这是由于法拉代的贡献.
- 该对称超级电容器装置在2Ag-1时实现了高特异电容142Fg-1的高特异电容,电压窗口宽度为1.4V.
- 该设备在功率密度为2.8kW kg-1时提供了38.66Wh kg-1的能量密度,并在10,000个循环后保持了95.89%的电容.
结论:
- 将P-Mg-CN电极与R-mgpe集成是提高对称超级电容器能量密度的有效策略.
- 开发的超级电容器表现出卓越的速率能力和长期循环稳定性.
- 这种方法为开发高性能储能设备提供了一个有前途的途径.
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