对于高性能离子电容器,单个原子在等级双碳上的协调工程
Zhaoyang Gao1, Song Tao1, Lv Zhu1
1College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, PR China.
Journal of colloid and interface science
|June 22, 2023
概括
这项研究通过在Zn-N4部分中引入兴奋剂来增强双碳材料中的储存. 这提高了高容量和稳定的离子电容器 (PIC) 的性能.
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:
- 双碳工程优化储存,但在平衡能力,速率能力和稳定性方面面临挑战.
- 金属--碳站点的协调工程是先进的储能材料的有希望的战略.
研究的目的:
- 通过协同P兴奋剂和Zn-N4协调,提高双碳材料中的储存性能.
- 研究P兴奋剂对Zn-N4部分电子结构和K+吸附的影响.
- 为离子电容器 (PIC) 开发高性能电极材料.
主要方法:
- 在双碳框架上对Zn-N4部分的协调工程与额外的P兴奋剂.
- 实验性表征和理论计算 (例如,DFT) 来分析电子结构和K+吸附/扩散.
- 在离子电容器中对合成的Zn-NPC@rGO材料进行电化学测试.
主要成果:
- 化剂有效调节Zn-N4部分的电子结构,增强K+吸附.
- 与N和P协调的单原子Zn减少了K+扩散障碍,改善了迁移动力学.
- 由此产生的 Zn-NPC@rGO 材料表现出高可逆性特异性,优异的速率能力和循环稳定性.
- 为离子电容器 (PIC) 实现了显著的功率和能量密度.
结论:
- 协同的P兴奋剂和Zn-N4协调工程是一种可行的策略,以优化用于储存的双碳材料.
- 增强的电子结构和促进的K+动力学是Zn-NPC@rGO.优越性能的关键.
- 这项工作为设计高性能离子电容器的先进碳基电极材料提供了宝贵的见解.
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