普鲁士蓝类似物阴极的阳离子-水动力学。

IF 6.6 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
ChemSusChem Pub Date : 2025-09-26 DOI:10.1002/cssc.202500901
Keren Shwartsman, Gil Bergman, Netta Bruchiel-Spanier, Stav Rahmany, Langyuan Wu, Yong Zhang, Munseok S Chae, Daniel Sharon, Netanel Shpigel
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引用次数: 0

摘要

普鲁士蓝类似物(PBA)阴极由于其开放的结构、较高的理论容量和快速的离子扩散通道而成为后锂电池极具前景的材料。它们的大间隙位点有利于小离子和大离子的可逆插入,从而实现有效的电荷存储。然而,这些间隙也可以容纳水分子,这将显著影响PBA的充电机制,从而影响其电化学性能。由于水在PBA阴极的工作电位下是非电活性的,因此在充电过程中监测水的动态是一项具有挑战性的任务。因此,对其对PBA电化学行为的贡献仍缺乏全面的了解。为了解决这一问题,采用带耗散监测的电化学石英晶体微天平对NiPBA电极在Na+、K+和Cs+的插入/提取过程进行了研究。该研究得到了实际电池配置的系统电化学分析和先进的x射线衍射测量的进一步支持,为PBA电极中的阳离子-水动力学提供了更深入的了解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cation-Water Dynamics in Prussian Blue Analogues Cathodes.

Prussian blue analogues (PBA) cathodes are emerging as promising electrode materials for post-Li batteries due to their open framework, high theoretical capacity, and fast ion diffusion channels. Their large interstitial sites facilitate the reversible intercalation of both small and bulky cations, enabling efficient charge storage. These interstitial spaces, however, can also accommodate water molecules, which significantly influence the charging mechanism and, consequently, the electrochemical performance of PBA. Since water is nonelectroactive at the working potential of PBA cathodes, monitoring the dynamics of H2O during charging is a challenging task. As a result, a comprehensive understanding of its contribution to the electrochemical behavior of PBA is still lacking. To address this issue, electrochemical quartz crystal microbalance with dissipation monitoring is employed to investigate NiPBA electrodes during the insertion/extraction of Na+, K+, and Cs+. This study is further supported by systematic electrochemical analysis in practical battery configurations and advanced X-ray diffraction measurements, providing deeper insights into the cation-water dynamics in PBA electrodes.

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来源期刊
ChemSusChem
ChemSusChem 化学-化学综合
CiteScore
15.80
自引率
4.80%
发文量
555
审稿时长
1.8 months
期刊介绍: ChemSusChem Impact Factor (2016): 7.226 Scope: Interdisciplinary journal Focuses on research at the interface of chemistry and sustainability Features the best research on sustainability and energy Areas Covered: Chemistry Materials Science Chemical Engineering Biotechnology
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