Conductive 2D metal-organic framework for high-performance cathodes in aqueous rechargeable zinc batteries.,Nature Communications

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Conductive 2D metal-organic framework for high-performance cathodes in aqueous rechargeable zinc batteries.
Nature Communications ( IF 14.7 ) Pub Date : 2019-10-30 , DOI: 10.1038/s41467-019-12857-4
Kwan Woo Nam ₁ , Sarah S Park ₁ , Roberto Dos Reis _{2,

3} , Vinayak P Dravid _{2,

3} , Heejin Kim ₄ , Chad A Mirkin ₁ , J Fraser Stoddart _{1,

5,

6}

Affiliation

Currently, there is considerable interest in developing advanced rechargeable batteries that boast efficient distribution of electricity and economic feasibility for use in large-scale energy storage systems. Rechargeable aqueous zinc batteries are promising alternatives to lithium-ion batteries in terms of rate performance, cost, and safety. In this investigation, we employ Cu3(HHTP)2, a two-dimensional (2D) conductive metal-organic framework (MOF) with large one-dimensional channels, as a zinc battery cathode. Owing to its unique structure, hydrated Zn2+ ions which are inserted directly into the host structure, Cu3(HHTP)2, allow high diffusion rate and low interfacial resistance which enable the Cu3(HHTP)2 cathode to follow the intercalation pseudocapacitance mechanism. Cu3(HHTP)2 exhibits a high reversible capacity of 228 mAh g-1 at 50 mA g-1. At a high current density of 4000 mA g-1 (~18 C), 75.0% of the initial capacity is maintained after 500 cycles. These results provide key insights into high-performance, 2D conductive MOF designs for battery electrodes.

中文翻译：

用于水性可充电锌电池高性能阴极的导电二维金属有机框架。

目前，人们对开发先进的可充电电池非常感兴趣，这种电池具有高效的电力分配能力以及在大规模储能系统中使用的经济可行性。就倍率性能、成本和安全性而言，可充电水性锌电池是锂离子电池的有前途的替代品。在这项研究中，我们采用 Cu3(HHTP)2，一种具有大一维通道的二维 (2D) 导电金属有机框架 (MOF) 作为锌电池阴极。由于其独特的结构，直接插入主体结构 Cu3(HHTP)2 中的水合 Zn2+ 离子具有高扩散速率和低界面电阻，这使得 Cu3(HHTP)2 阴极能够遵循插层赝电容机制。Cu3(HHTP)2 在 50 mA g-1 下表现出 228 mAh g-1 的高可逆容量。在4000 mA g-1（~18 C）的高电流密度下，500次循环后仍保持初始容量的75.0%。这些结果为电池电极的高性能、2D 导电 MOF 设计提供了重要见解。

更新日期：2019-10-30

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