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首页> 外文期刊>Advanced energy materials >Metal-Organic Framework Cathodes Based on a Vanadium Hexacyanoferrate Prussian Blue Analogue for High-Performance Aqueous Rechargeable Batteries
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Metal-Organic Framework Cathodes Based on a Vanadium Hexacyanoferrate Prussian Blue Analogue for High-Performance Aqueous Rechargeable Batteries

机译：基于六氰基高铁酸钒普鲁士蓝类似物的高性能有机可充电电池金属有机框架阴极

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摘要

Despite the unique advantages of the metal-organic framework of Prussian blue analogues (PBAs), including a favorable crystallographic structure and facile diffusion kinetics, the capacity of PBAs delivered in aqueous systems has been limited to approximate to 60 mA h g(-1) because only single species of transition metal ions incorporated into the PBAs are electrochemically activated. Herein, vanadium hexacyanoferrate (V/Fe PBA) is proposed as a breakthrough to this limitation, and its electrochemical performance as a cathode for aqueous rechargeable batteries (ARBs) is investigated for the first time. V/Fe PBAs are synthesized by a simple co-precipitation method with optimization of the acidity and molar ratios of precursor solutions. The V/Fe PBAs provide an improved capacity of 91 mA h(-1) under a current density of 110 mA g(-1) (C-rate of approximate to 1.2 C), taking advantage of the multiple-electron redox reactions of V and Fe ions. Under an extremely fast charge/discharge rate of 3520 mA g(-1), the V/Fe PBA exhibits a sufficiently high discharge capacity of 54 mA h g(-1) due to its opened structure and 3D hydrogen bonding networks. V/Fe PBA-based ARBs are the most promising candidates for large-scale stationary energy storage systems due to their high electrochemical performance, reasonable cost, and high efficiency.
机译：尽管普鲁士蓝类似物（PBA）的金属有机骨架具有独特的优势，包括有利的晶体结构和便捷的扩散动力学，但在水性体系中传递的PBA的容量已被限制为大约60 mA hg（-1），因为掺入到PBA中的过渡金属离子只有一种被电化学激活。在本文中，提出了六氰合铁酸钒（V / Fe PBA）作为对此限制的突破，并且首次研究了其作为水性充电电池（ARB）阴极的电化学性能。 V / Fe PBA通过简单的共沉淀法合成，并优化了前体溶液的酸度和摩尔比。 V / Fe PBA在110 mA g（-1）的电流密度（C速率接近1.2 C）下可提供91 mA h（-1）的改进容量，利用了Pb的多电子氧化还原反应钒和铁离子。在3520 mA g（-1）的极快充电/放电速率下，V / Fe PBA由于其开放的结构和3D氢键网络表现出足够高的54 mA h g（-1）放电容量。基于V / Fe PBA的ARB具有高电化学性能，合理的成本和高效率，因此是大规模固定式储能系统最有希望的候选者。

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  • 来源
    《Advanced energy materials》 |2017年第2期|1601491.1-1601491.10|共10页
  • 作者

    Lee Ji-Hoon; Ali Ghulam; Kim Dong Hyun; Chung Kyung Yoon;

  • 作者单位

    Korea Inst Sci & Technol, Ctr Energy Convergence Res, Hwarangno 14 Gil 5, Seoul 136791, South Korea;

    Korea Inst Sci & Technol, Ctr Energy Convergence Res, Hwarangno 14 Gil 5, Seoul 136791, South Korea|Korea Univ Sci & Technol, 217 Gajeong Ro, Daejeon 305333, South Korea;

    Korea Inst Sci & Technol, Ctr Energy Convergence Res, Hwarangno 14 Gil 5, Seoul 136791, South Korea;

    Korea Inst Sci & Technol, Ctr Energy Convergence Res, Hwarangno 14 Gil 5, Seoul 136791, South Korea|Korea Univ Sci & Technol, 217 Gajeong Ro, Daejeon 305333, South Korea;

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  • 正文语种 eng
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  • 关键词

    aqueous rechargeable batteries; electrochemical energy storage; metal-organic frameworks; Prussian blue analogues;

    机译：水性充电电池;电化学储能;金属有机框架;普鲁士蓝类似物;

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