在高级离子混合电容器的碳外中不对称协调的原子Nb-O/N集群的无形调制
Baoquan Liu1, Shuxiao Hu1, Yang Pan2
1School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, Jiangxi, 330063, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|November 10, 2023
概括
在N-化碳外中的原子无形的氧/集群提高了离子混合电容的性能. 这种设计通过改善离子运输和先进电池的动力学来增强能量储存.
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:
- 离子混合电容器 (SIHC) 需要先进的阳极材料来结合电池和电容器的优势.
- 无形调制是提高SIHC中的能量和功率密度的关键策略.
研究的目的:
- 为高性能SIHC开发新的阳极材料.
- 研究具有不对称协调的原子无形集群对离子储存的影响.
主要方法:
- 在N-doped空心碳外 (Nb-O/N@C) 中现场创建无形Nb-O/N集群.
- 集群配置,电荷密度,扩散障碍和缺陷地点的表征.
- 对Nb-O/N@C作为SIHCs的阳极材料进行电化学测试.
主要成果:
- Nb-O/N@C具有不对称的Nb-O3/N1配置,具有高电荷密度和低扩散障碍.
- 该材料表现出优异的离子储能能力 (240.1 mAh g-1 在10.0 A g-1 在 8000 个循环后).
- 使用Nb-O/N@C的SIHC可以在显著功率密度 (4001.5 W Kg-1) 的情况下实现高能量密度 (230 Wh Kg-1).
结论:
- 具有不对称协调的原子无形集群显著增强离子储存特性.
- 开发的Nb-O/N@C材料显示出对高性能离子电池和SIHCs的巨大潜力.
- 设计无形集群为下一代储能设备提供了一个有希望的途径.
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