通过添加 Mg2+ 实现双离子载流子存储,打造高能量、长寿命的锌-离子混合电容器

IF 5.6 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Junjie Zhang, Xiang Wu
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引用次数: 0

摘要

阳离子添加剂可有效提高锌-离子混合电容器(ZHC)的总体电化学能力。然而,它们在锌基系统中的储能机制仍存在争议。在此,我们通过添加镁离子来调节电解质并实现双离子存储。我们还组装了几种不同电解质浓度的锌/活性炭器件,并研究了它们的电化学反应动力学行为。含有 Mg2+ 混合溶液的锌离子电容器在 1 A-g-1 的条件下可提供 82 mAh-g-1 的电容量,并且在 10000 次循环后仍能保持原有电容量的 91%。它优于其他在单组分电解质中组装的锌离子器件。这一发现表明,双离子存储机制使 ZHC 具有卓越的速率性能和较长的循环寿命。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dual-ion carrier storage through Mg2+ addition for high-energy and long-life zinc-ion hybrid capacitor

Cation additives can efficiently enhance the total electrochemical capabilities of zinc-ion hybrid capacitors (ZHCs). However, their energy storage mechanisms in zinc-based systems are still under debate. Herein, we modulate the electrolyte and achieve dual-ion storage by adding magnesium ions. And we assemble several Zn//activated carbon devices with different electrolyte concentrations and investigate their electrochemical reaction dynamic behaviors. The zinc-ion capacitor with Mg2+ mixed solution delivers 82 mAh·g−1 capacity at 1 A·g−1 and maintains 91% of the original capacitance after 10000 cycling. It is superior to the other assembled zinc-ion devices in single-component electrolytes. The finding demonstrates that the double-ion storage mechanism enables the superior rate performance and long cycle lifetime of ZHCs.

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来源期刊
CiteScore
9.30
自引率
16.70%
发文量
205
审稿时长
2 months
期刊介绍: International Journal of Minerals, Metallurgy and Materials (Formerly known as Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material) provides an international medium for the publication of theoretical and experimental studies related to the fields of Minerals, Metallurgy and Materials. Papers dealing with minerals processing, mining, mine safety, environmental pollution and protection of mines, process metallurgy, metallurgical physical chemistry, structure and physical properties of materials, corrosion and resistance of materials, are viewed as suitable for publication.
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