High-Performance Aqueous Zinc Batteries Based on Organic/Organic Cathodes Integrating Multiredox Centers,Advanced Materials

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High-Performance Aqueous Zinc Batteries Based on Organic/Organic Cathodes Integrating Multiredox Centers
Advanced Materials ( IF 27.4 ) Pub Date : 2021-10-08 , DOI: 10.1002/adma.202106469
Yi Zhao ₁ , Yongxin Huang _{1,

2} , Feng Wu _{1,

2,

3} , Renjie Chen _{1,

2,

3} , Li Li _{1,

2,

3,

4}

Affiliation

Organic cathode materials with redox-active sites and flexible structure are promising for developing aqueous zinc ion batteries with high capacity and large output power. However, the energy storage of most organic hosts relies on the coordination/incoordination reaction between Zn²⁺/H⁺ and a single functional group, which result in inferior capacity, low discharge platform, and structural instability. Here, the lead is taken in in situ electrodepositing stable poly(1,5-naphthalenediamine, 1,5-NAPD) as interlayer and excellent conductive poly(para-aminophenol, pAP) skin onto nanoporous carbon in sequence for the structural optimization of organic/organic cathodes, designated as C@multi-layer polymer. In situ analyses, electrochemical measurements, and theoretical calculation prove that both CO and CN active groups can act as a strong electron donor as well as Zn²⁺ host during the discharging process. Benefiting from the synergistic effect of the double organic layers, C@multi-layer polymer delivers high capacity, long lifespan, and excellent capacity reservation even at large discharge current and commercial mass loading (>10 mg cm⁻²). Introducing multiredox centers into one organic composites will provide new insights into designing advanced Zn–organic batteries.

中文翻译：

基于集成多氧化还原中心的有机/有机阴极的高性能水性锌电池

具有氧化还原活性位点和柔性结构的有机正极材料有望用于开发高容量和大输出功率的水性锌离子电池。然而，大多数有机主体的储能依赖于 Zn ²⁺ /H ⁺之间的配位/失配反应。且官能团单一，导致容量差、放电平台低、结构不稳定。在这里，铅被原位电沉积稳定的聚（1,5-萘二胺，1,5-NAPD）作为中间层和优异的导电聚（对氨基苯酚，pAP）表层依次在纳米多孔碳上进行结构优化。 /有机阴极，称为C@多层聚合物。原位分析、电化学测量和理论计算证明 CO 和 CN 活性基团都可以作为强电子供体以及 Zn ²⁺主机在放电过程中。受益于双有机层的协同效应，C@多层聚合物即使在大放电电流和商业质量负载（>10 mg cm ^-2）下也能提供高容量、长寿命和出色的容量保留。将多氧化还原中心引入一种有机复合材料将为设计先进的锌有机电池提供新的见解。

更新日期：2021-10-08

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