有缺陷的核心外NiCo2S4/MnO2纳米复合材料用于高性能固态混合超级电容器
Jinhe Wei1, Fei Hu1, Xiong Shen1
1Key Laboratory of In-Fiber Integrated Optics, Ministry Education of China, and College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China.
Journal of colloid and interface science
|June 28, 2023
概括
垂直导向的NiCo2S4/MnO2纳米复合材料中的氧气空隙显著提高了超级电容器的电化学性能. 这项研究详细介绍了它们的合成和应用,显示了增强的能量密度和稳定性.
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:
- 氧气空缺在提高电化学性能方面起着至关重要的作用,但它们对NiCo2S4/MnO2纳米复合材料的具体影响需要进一步阐明.
- 开发高性能电极材料对于推进超级电容器等储能技术至关重要.
研究的目的:
- 在泡 (NF) 上合成垂直导向的NiCo2S4/MnO2核心外纳米复合材料.
- 研究氧气空位工程对NiCo2S4/MnO2.2的电化学特性的影响.
- 为了评估这些纳米复合材料在固态混合超级电容器中的性能.
主要方法:
- 在泡上的NiCo2S4/MnO2核心外纳米结构的现场生长.
- 氧气空缺工程的化学还原方法.
- 使用扫描电子显微镜 (SEM) 和传输电子显微镜 (TEM) 进行表征.
- 密度函数理论 (DFT) 计算,以了解电子结构的修改.
- 电极材料和组装的超级电容器设备的电化学测试.
主要成果:
- 在NF上成功合成了垂直导向的NiCo2S4/MnO2核心外纳米结构.
- 通过化学减少 (60分钟) 进行氧气空置工程,有效调整电子和结构性质.
- NiCo2S4/MnO2-60电极表现出2.13 mAh·cm−2的高面积容量和优越的速率能力.
- 组装的固态混合超级电容器 (NiCo2S4/MnO2-60//AC) 在384.21W·kg-1的功率密度下实现了43.16Wh·kg-1的能量密度.
- 该设备表现出极好的循环稳定性,在10,000个循环后保持92.1%的容量.
结论:
- 该研究强调了氧气空缺在提高NiCo2S4/MnO2纳米复合材料的电化学性能方面的关键作用.
- 开发的NiCo2S4/MnO2-60材料是高性能超级电容应用的有希望的候选材料.
- 氧空位工程为设计用于储能的先进电极材料提供了可行的策略.
关键词:
缺陷工程是什么?缺陷工程是什么?密度函数理论密度函数理论混合超级电容器 混合超级电容器(NiCo) 2S 4/MnO 2 ) (NiCo) 2S 4/MnO 2 (NiCo2) (MnO2) (NiCo2) (NiCo2) (S) 4/MnO2) (MnO2) (NiCo2) (NiCo2) (S) 4/MnO2) (MnO2) (NiCo2) (NiCo2) (S) 4/MnO2) (NiCo2) (NiCo2) (S) 4/MnO2) (MnO2) (MnO2) (MnO2) (MnO2) (MnO2) (MnO2) (MnO2) (MnO2) (MnO2) (MnO2) (MnO2)) (MnO2) (MnO2) (MnO2)有一个空缺的氧气.更多相关视频
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