An Aqueous Hybrid Zinc‐Bromine Battery with High Voltage and Energy Density,ChemElectroChem

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An Aqueous Hybrid Zinc‐Bromine Battery with High Voltage and Energy Density
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-03-02 , DOI: 10.1002/celc.201902030
Xinhai Yuan _{1,

2} , Jun Mo ₂ , Jie Huang ₃ , Jun Liu ₂ , Canming Liu ₂ , Xianxiang Zeng ₂ , Wenxin Zhou ₂ , Junpei Yue ₄ , Xiongwei Wu _{2,

4} , Yuping Wu _{1,

2}

Affiliation

The zinc‐bromine redox flow battery (ZBB) is an ideal device of energy storage systems. Nevertheless, its energy density is relatively low compared to those of Li‐ion batteries, due to its low output voltage. Herein, a high‐voltage aqueous hybrid zinc‐bromine battery system (AHZBBs) was developed, where K⁺‐conducting membrane was used to segregate neutral‐alkaline hybrid electrolytes and redox couples of Br₂/Br⁻and [Zn(OH)₄]²⁻/Zn at the positive and negative electrode. Benefited from an efficient and stable cathode catalyst (carbon‐manganite nanoflakes), this AHZBB delivered a high average output voltage of 2.15 V and energy density of 276.7 Wh/kg without capacity attenuation after 200 cycles. More importantly, this work provides an efficient avenue to elevating the output voltage and energy density, and will strongly encourage studies on redox flow batteries.

中文翻译：

具有高电压和高能量密度的水性锌-溴混合电池

溴化锌锌还原液流电池（ZBB）是能量存储系统的理想设备。然而，由于其低输出电压，与锂离子电池相比，其能量密度相对较低。在此，高电压水性复合锌溴电池系统（AHZBBs）的开发，其中，K ⁺ -conducting膜用于分离中性-碱性电解质混合和Br的氧化还原对₂ /溴^-并且，[Zn（OH）₄ ] ²⁻/ Zn在正极和负极。得益于高效，稳定的阴极催化剂（碳锰矿纳米薄片），这款AHZBB的平均输出电压高，为2.15 V，能量密度为276.7 Wh / kg，经过200次循环后容量未降低。更重要的是，这项工作为提高输出电压和能量密度提供了一条有效途径，并将大力鼓励人们对氧化还原液流电池进行研究。

更新日期：2020-03-02

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