工程稀土辅助的氧化物凝 为了在不对称的超级电容器中存储优质的能量
Pritam J Morankar1, Rutuja U Amate1, Aviraj M Teli2
1School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Republic of Korea.
Gels (Basel, Switzerland)
|November 26, 2025
概括
稀土配合氧化物 (Co3O4) 凝增强了超级电容器的性能. 和加多的注会产生多孔结构,提高先进的储能器件的容量和稳定性.
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
- 纳米技术纳米技术
背景情况:
- 高性能超级电容器需要具有优化的电子结构和缺陷化学的过渡金属氧化物.
- 氧化物 (Co3O4) 是一个有前途的材料,但其性能需要提高,以获得更优质的能量储存.
研究的目的:
- 通过使用稀土 (RE) 兴奋剂 (新,加多或两者) 的sol-gel合成,设计氧化物 (Co3O4) 凝.
- 调查RE兴奋剂对Co3O4.4的结构,形态和电子效应.
- 为了评估这些工程材料的电化学性能,作为超级电容器电极.
主要方法:
- 控制的sol-gel合成用于Co3O4凝制剂.
- 稀土 (Nd,Gd,Nd/Gd) 兴奋剂用于工程 Co3O4.
- 用X射线衍射 (XRD),场发射扫描电子显微镜 (FE-SEM) 和X射线光电子光谱 (XPS) 来进行材料特征.
- 电化学测量 (电容,循环稳定性,离子扩散,电阻) 和非对称超级电容器设备的制造.
主要成果:
- 在RE兴奋剂后,XRD证实了立方旋转结构与格子应变和氧气空缺.
- 在RE-doped Co3O4.4中,FE-SEM显示过渡到高度多孔,相互连接的框架.
- XPS证实了稳定的RE合并和增强的氧缺陷状态.
- Nd/Gd-Co3O4电极表现出高面积电容 (25 F/cm2在8 mA/cm2),优异的离子扩散,低ESR (0.26 Ω) 和出色的循环稳定性 (12,000 个循环后保持 84.35%).
- 使用Nd/Gd-Co3O4的非对称超级电容器装置显示了宽电压窗口 (1.5V),高面积电容 (140 mF/cm2) 和良好的能量密度 (0.044 mWh/cm2).
结论:
- 稀土配合,特别是Nd/Gd,有效地设计了Co3O4凝,用于增强的超级电容器应用.
- 由此产生的多孔结构和缺陷化学显著提高了电化学性能和长期稳定性.
- 这一战略提供了一个可扩展的方法,用于开发高能和稳定的不对称超级电容器的先进电极材料.
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