双增强纳米尺寸铁氧化物/碳核外纳米棒,使持久的离子混合电容器成为可能
Zengwei Pang1, Miaomiao Liu1, Shenteng Wan1
1School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, 730050, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|February 17, 2025
概括
一种新的纳米尺寸的Fe3O4阳极材料,增强了由MOF衍生的碳和N,P-doped碳,增强了离子混合电容器. 这种设计可以提高电网规模储能的能量密度和循环稳定性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 离子混合电容器 (SIHC) 提供了电网规模储能的潜力,但需要先进的阳极材料.
- 目前的局限性包括不足的离子扩散动力学和阳极的结构不稳定性.
研究的目的:
- 为SIHC开发一种具有增强性能的新型阳极材料.
- 解决现有阳极材料对于快速离子扩散和结构强度的局限性.
主要方法:
- 使用纳米尺寸的Fe3O4,MOF衍生的多孔碳和N,P-co-doped聚合物衍生的碳,制造核心外复合材料 (Fe3O4/NPC).
- 材料的结构,组成和电化学性质的表征.
- 使用开发的阳极材料组装和测试SIHC设备.
主要成果:
- Fe3O4/NPC复合材料具有强大的笔状核心外结构.
- 该材料显示了电荷/电子传输距离的缩小以及大量的伪电容位点.
- 在离子电池2500个循环后,阳极材料实现了86.6%的容量保留.
- 组装后的SIHC的能量密度为147.1 W h kg−1,并在8000个循环后保持了92%的容量.
结论:
- 新型Fe3O4/NPC阳极材料显著提高了离子混合电容器的性能.
- 核心外结构和兴奋剂策略有助于卓越的自行车耐用性和速度能力.
- 这一发展为具有成本效益和高性能的电网规模储能解决方案铺平了道路.
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