作为自支撑电极的掺氮多孔碳纤维可增强锌离子混合超级电容器的性能

IF 3.8 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Dongjia Xie, Shibo Liu, Wei Wei, Zile Zhou, Xuezhou Fu, Zhongtao Shang, Yuan Wang, Shaojun Yuan
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引用次数: 0

摘要

锌离子混合超级电容器(ZHSCs)被认为是一种前景广阔的安全储能系统。碳基阴极材料的设计对于提高锌离子超级电容器的性能至关重要。本研究采用模板法和蚀刻法制备了氮掺杂多孔碳纤维(NPCE),可直接用作 ZHSCs 的阴极。通过合理控制 ZnO 模板剂的用量,调整了离子传输通道,从而增强了离子传输,提高了电容贡献率。作为碳和氮资源的聚丙烯腈的热解为电荷存储提供了丰富的氮官能团。在 2 M ZnSO4 电解质中,优化的 NPCE-4 表现出卓越的电化学性能,在电流密度为 1 mA cm-2 时电容为 283.9 F g-1。ZHSC 的能量密度为 101 Wh kg-1,功率密度为 457 W kg-1,同时具有出色的循环寿命,在 20 mA cm-2 循环 10,000 次后,容量保持率为 98.9%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Nitrogen-Doped Porous Carbon Fiber as a Self-Supporting Electrode for Boosting Zinc-Ion Hybrid Supercapacitors

Nitrogen-Doped Porous Carbon Fiber as a Self-Supporting Electrode for Boosting Zinc-Ion Hybrid Supercapacitors
Zinc-ion hybrid supercapacitors (ZHSCs) are considered to be a promising and safe energy storage system. The design of carbon-based cathode materials is crucial to improving the performance of ZHSCs. In this work, a nitrogen-doped porous carbon fiber (NPCE) was prepared by a combination of template and etching methods, which could directly serve as the cathode for ZHSCs. The ion transfer channel was adjusted by rationally controlling the amount of ZnO template agent, which enhanced ion transfer and increased the capacitive contribution. The pyrolysis of polyacrylonitrile as carbon and nitrogen resources provided rich nitrogen functional groups for charge storage. In a 2 M ZnSO4 electrolyte, the optimized NPCE-4 exhibited superior electrochemical performance with a capacitance of 283.9 F g–1 at a current density of 1 mA cm–2. The ZHSC achieved an energy density of 101 Wh kg–1 at a power density of 457 W kg–1, along with excellent cycle life with a capacity retention rate of 98.9% at 20 mA cm–2 after 10 000 cycles.
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来源期刊
Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research 工程技术-工程:化工
CiteScore
7.40
自引率
7.10%
发文量
1467
审稿时长
2.8 months
期刊介绍: ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
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