在水热CeO2/石墨烯纳米复合材料中进行界面缺陷调制,用于下一代超级电容器
Saira1, Hassan Akbar2, Ayesha Bibi1
1Department of Physics, The University of Lahore 1-km, Defense Road Lahore 54000 Pakistan asghar246@gmail.com.
RSC advances
|March 4, 2026
概括
氧化/石墨烯纳米复合材料显示了增强的超级电容性能. 这些材料表现出更好的电荷存储和能量密度,使它们成为先进的能量存储解决方案的前景.
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:
- 超级电容器对于储能至关重要,需要先进的材料来提高性能.
- 氧化 (CeO2) 和石墨烯被单独探索用于能源应用,但它们的协同作用组合不太了解.
研究的目的:
- 使用水热方法合成和描述CeO2/石墨烯纳米复合材料.
- 为了评估这些纳米复合材料的超级电容性能.
主要方法:
- CeO2/石墨烯纳米复合物的水热合成.
- 使用X射线衍射 (XRD),传输电子显微镜 (TEM),拉曼光谱和紫外线可见光谱进行表征.
- 通过循环电压测量 (CV),静电电荷放电 (GCD) 和电化学阻抗光谱 (EIS) 评估电化学性能.
主要成果:
- XRD和TEM证实了CeO2在石墨烯矩阵中的成功合成和纳米级集成.
- 拉曼光谱验证了缺陷丰富的石墨烯和CeO的存在.
- 与纯CeO2 (142 F g-1) 相比,CeO2/石墨烯纳米复合材料表现出更高的特异电容 (231 F g-1),提高了循环稳定性和降低了电荷传输阻力,从而提高了能量 (5.7 Wh kg-1) 和功率密度.
结论:
- CeO2/石墨烯纳米复合材料在超级电容应用中表现出优异的电化学性能.
- 在CeO2-石墨烯接口上的协同作用显著提高了电荷存储能力.
- 这些纳米复合材料代表了下一代储能设备的有希望的途径.
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