Electrochemically Induced Metal-Organic-Framework-Derived Amorphous V2 O5 for Superior Rate Aqueous Zinc-Ion Batteries.,Angewandte Chemie International Edition

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Electrochemically Induced Metal-Organic-Framework-Derived Amorphous V2 O5 for Superior Rate Aqueous Zinc-Ion Batteries.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-08-25 , DOI: 10.1002/anie.202010287
Shenzhen Deng ₁ , Zishun Yuan ₁ , Zhiwei Tie ₁ , Changda Wang ₂ , Li Song ₂ , Zhiqiang Niu ₁

Affiliation

The electrochemical performance of vanadium‐oxide‐based cathodes in aqueous zinc‐ion batteries (ZIBs) depends on their degree of crystallinity and composite state with carbon materials. An in situ electrochemical induction strategy was developed to fabricate a metal–organic‐framework‐derived composite of amorphous V₂O₅ and carbon materials (a‐V₂O₅@C) for the first time, where V₂O₅ is in an amorphous state and uniformly distributed in the carbon framework. The amorphous structure endows V₂O₅ with more isotropic Zn²⁺ diffusion routes and active sites, resulting in fast Zn²⁺ transport and high specific capacity. The porous carbon framework provides a continuous electron transport pathway and ion diffusion channels. As a result, the a‐V₂O₅@C composites display extraordinary electrochemical performance. This work will pave the way toward design of ZIB cathodes with superior rate performance.

中文翻译：

电化学诱导的金属有机框架衍生的无定形V2 O5，可提供高速率的锌离子水电池。

水性锌离子电池（ZIBs）中基于钒氧化物的阴极的电化学性能取决于其结晶度和与碳材料的复合状态。开发了一种原位电化学感应策略，以首次制造金属-有机-框架衍生的无定形V ₂ O ₅和碳材料（a-V ₂ O ₅ @C），其中V ₂ O ₅为非晶态并均匀分布在碳骨架中。非晶结构使V ₂ O ₅具有更多的各向同性的Zn ²⁺扩散路径和活性位，从而产生快速的Zn ²⁺运输能力高。多孔碳骨架提供了连续的电子传输路径和离子扩散通道。结果，a-V ₂ O ₅ @C复合材料显示出非凡的电化学性能。这项工作将为设计具有优异速率性能的ZIB阴极铺平道路。

更新日期：2020-08-25

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