N/O桥刺激了碳纳米纤维和NiCo LDH之间强大的结合能量和快速的电荷转移,用于先进的超级电容器
Yuancong Luo1, Yihui Shen1, Huicheng Ge1
1School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
Journal of colloid and interface science
|August 28, 2024
概括
/氧联合合的多孔碳纳米纤维增强了超级电容器的多层双氧化物复合材料. 这种新的异构结构提高了活性材料的负载,稳定性和性能,显示了储能应用的巨大潜力.
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:
- 层状双氧化物 (LDH) 碳复合材料面临着聚合,导电性差,结合能量弱,电荷转移不足等挑战.
- 这些限制阻碍了活性物质负载,循环稳定性和超级电容器应用中的实际容量.
研究的目的:
- 开发一种新的NiCo LDH@NOPCNFs异构结构,以提高超级电容器性能.
- 调查和氧共在多孔碳纳米纤维 (NOPCNFs) 中的作用,以改善LDH集成和电荷转移.
主要方法:
- 通过将伊米达酸框架-8纳米颗粒与用于电的聚烯二混合来制备NOPCNFs.
- 热定NiCo LDH纳米板在NOPCNFs上形成NiCo LDH@NOPCNFs异构结构.
- 密度函数理论 (DFT) 计算来分析界面相互作用和电荷转移机制.
主要成果:
- 通过静电吸附和p-d共价杂交,N/O共促进了NiCo LDH和NOPCNF之间强大的结合.
- 由于增强的界面电场,异构结构表现出加速的电荷转移.
- 获得了高活性物质负载 (55 wt%),特异容量 (1340 F/g在1 A/g,2463 F/g为LDH) 和周期性耐用性 (5000 个周期).
结论:
- 尼科LDH和NOPCNF之间的协同相互作用显著提高了超级电容器的性能.
- 碳材料中的异原子合对于高效集成电活性材料至关重要.
- 尼科LDH@NOPCNFs异构结构证明了储能设备的有希望的实际应用前景.
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