基于阴离子和阳离子存储化学的 N 掺杂多孔碳用于高能量和功率密度锌离子电容器。

IF 14.1 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Yuanyuan Liang, Miaomiao Wu, Anjie Liu, Qihua Chen, Yan Wu, Qian Xiang, Zhibo Liu, Jixi Guo, Xingchao Wang, Dianzeng Jia
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引用次数: 0

摘要

锌离子混合电容器(ZIHC)因其低成本、高度内在安全性和生态友好性而有望用于大规模能源存储。然而,由于缺乏先进的阴极,其能量密度一直受到限制。本文介绍了一种用于 ZIHC 的高容量阴极材料,名为掺杂 N 的多孔碳(CFeN-2)。CFeN-2 是以 FeCl3-6H2O 为催化活性剂,三聚氰胺为氮源,通过煤沥青退火工艺合成的,具有显著的氮含量(10.95 wt%)、较大的比表面积(1037.66 m2 g-1)、丰富的晶格缺陷和超高的微孔率。这些特性通过理论模拟和实验测试得到了验证,从而使 CFeN-2 实现了涉及 Zn2+ 离子和 CF3SO3 - 阴离子的双离子储能机制。在用作 ZIHC 的阴极时,CFeN-2 可实现 142.5 W h kg-1 的高能量密度和 9500.1 W kg-1 的高功率密度。此外,使用 CFeN-2 的 ZIHC 性能出众,在 10 A g-1 条件下循环 10 000 次后,容量保持率达到 77%,库仑效率接近 100%,大大优于当前的 ZIHC。这项研究为开发用于 ZIHC 应用的煤沥青碳衍生高能量和高功率阴极提供了一条途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

N-Doped Porous Carbon Based on Anion and Cation Storage Chemistry for High-Energy and Power-Density Zinc Ion Capacitor

N-Doped Porous Carbon Based on Anion and Cation Storage Chemistry for High-Energy and Power-Density Zinc Ion Capacitor

N-Doped Porous Carbon Based on Anion and Cation Storage Chemistry for High-Energy and Power-Density Zinc Ion Capacitor

Zinc ion hybrid capacitors (ZIHCs) show promise for large-scale energy storage because of their low cost, highly intrinsic safety, and eco-friendliness. However, their energy density has been limited by the lack of advanced cathodes. Herein, a high-capacity cathode material named N-doped porous carbon (CFeN-2) is introduced for ZIHCs. CFeN-2, synthesized through the annealing of coal pitch with FeCl3·6H2O as a catalytic activator and melamine as a nitrogen source, exhibits significant N content (10.95 wt%), a large surface area (1037.66 m2 g−1), abundant lattice defects and ultrahigh microporosity. These characteristics, validated through theoretical simulations and experimental tests, enable a dual-ion energy storage mechanism involving Zn2+ ions and CF3SO3 anions for CFeN-2. When used as a cathode in ZIHCs, CFeN-2 achieves a high-energy density of 142.5 W h kg−1 and a high-power density of 9500.1 W kg−1. Furthermore, using CFeN-2 ZIHCs demonstrate exceptional performance with 77% capacity retention and nearly 100% coulombic efficiency after 10 000 cycles at 10 A g−1, showcasing substantially superior performance to current ZIHCs. This study offers a pathway for developing high-energy and high-power cathodes derived from coal pitch carbon for ZIHC applications.

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来源期刊
Advanced Science
Advanced Science CHEMISTRY, MULTIDISCIPLINARYNANOSCIENCE &-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
18.90
自引率
2.60%
发文量
1602
审稿时长
1.9 months
期刊介绍: Advanced Science is a prestigious open access journal that focuses on interdisciplinary research in materials science, physics, chemistry, medical and life sciences, and engineering. The journal aims to promote cutting-edge research by employing a rigorous and impartial review process. It is committed to presenting research articles with the highest quality production standards, ensuring maximum accessibility of top scientific findings. With its vibrant and innovative publication platform, Advanced Science seeks to revolutionize the dissemination and organization of scientific knowledge.
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