用于锌-离子混合超级电容器的具有超高容积性能的硼氮共掺杂多孔碳

IF 6.5 3区 材料科学 Q2 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Tingting Song, Jiayi Chen, Weijian Chen, Xinyang Zhang, Xiaoliang Wu, Xin Wang
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引用次数: 0

摘要

对于空间有限的超级电容器而言,如何在不牺牲重力电容的情况下获得高体积电容是碳材料面临的巨大挑战。本文以硼酸为模板和硼源,聚丙烯酰胺为碳源和氮源,采用一步碳化法制备了 B/N/O 共掺杂多孔碳材料。硼酸与聚丙烯酰胺可通过氢键紧密结合,既能充分发挥硼酸模板的作用,又能实现高含量的氮和硼官能团。得益于高密度(1.51 g cm-3)、合适的比表面积(243.2 m2 g-1)和大量的 B(7.55 at.%)、N(14.38 at.%)、O(8.89 at.%)官能团,制备出的 BNPC-700 电极在 0.5 A g-1 时显示出 545.6 F cm-3 的超高容积比电容、优异的速率特性和卓越的电化学性能。此外,组装好的 BNPC-700 对称超级电容器在 ZnSO4 水电解液中实现了 31.1 Wh L-1 (20.6 Wh kg-1)的高体积能量密度。更重要的是,组装好的 Zn//ZnSO4//BNPC-700 混合超级电容器可提供 210.8 mAh cm-3 的高容积容量和 147.7 Wh L-1 (97.8 Wh kg-1) 的高容积能量密度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Boron and Nitrogen Co-Doped Porous Carbon with Ultrahigh Volumetric Performance for Zinc-Ion Hybrid Supercapacitors

Boron and Nitrogen Co-Doped Porous Carbon with Ultrahigh Volumetric Performance for Zinc-Ion Hybrid Supercapacitors

It is a huge challenge for carbon materials to obtain high volumetric capacitance without sacrificing gravimetric capacitance for supercapacitors with limited space. Herein, B/N/O co-doped porous carbon materials are prepared by one-step carbonization method using boric acid as the template and boron source, polyacrylamide as the carbon and nitrogen sources. Boric acid and polyacrylamide can be closely combined by hydrogen bond, so as to not only give full play to the role of boric acid template, but also to achieve high content of nitrogen and boron functional groups. Benefiting from the high bulk density (1.51 g cm−3), suitable specific surface area (243.2 m2 g−1) and numerous B (7.55 at.%), N (14.38 at.%), O (8.89 at.%) functional groups, the prepared BNPC-700 electrode shows an ultrahigh volumetric specific capacitance of 545.6 F cm−3 at 0.5 A g−1, excellent rate characteristic and superior electrochemical performance. Furthermore, the assembled BNPC-700 symmetric supercapacitor achieves a high volumetric energy density of 31.1 Wh L−1 (20.6 Wh kg−1) in ZnSO4 aqueous electrolyte. More importantly, the assembled Zn//ZnSO4//BNPC-700 hybrid supercapacitor delivers a high volumetric capacity of 210.8 mAh cm−3 and a high volumetric energy density of 147.7 Wh L−1(97.8 Wh kg−1).

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来源期刊
Advanced Sustainable Systems
Advanced Sustainable Systems Environmental Science-General Environmental Science
CiteScore
10.80
自引率
4.20%
发文量
186
期刊介绍: Advanced Sustainable Systems, a part of the esteemed Advanced portfolio, serves as an interdisciplinary sustainability science journal. It focuses on impactful research in the advancement of sustainable, efficient, and less wasteful systems and technologies. Aligned with the UN's Sustainable Development Goals, the journal bridges knowledge gaps between fundamental research, implementation, and policy-making. Covering diverse topics such as climate change, food sustainability, environmental science, renewable energy, water, urban development, and socio-economic challenges, it contributes to the understanding and promotion of sustainable systems.
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