An organic-based aqueous hybrid flow battery with high power and long cycle life: a tetrapyridophenazine/ferrocyanide system,Journal of Materials Chemistry A

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An organic-based aqueous hybrid flow battery with high power and long cycle life: a tetrapyridophenazine/ferrocyanide system
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020/03/12 , DOI: 10.1039/d0ta02070b
Yang Zhang _{1,

2,

3,

4} , Jianyu Cao _{1,

2,

3,

4} , Zhidong Chen _{1,

2,

3,

4} , Juan Xu _{1,

2,

3,

4} , Chengzhong Yu _{5,

6,

7,

8}

Affiliation

Aqueous hybrid flow batteries (AHFBs) have emerged as promising systems for large-scale electrical energy storage. We report a stable conjugated organic compound, tetrapyridophenazine (TPPHZ), as an active anode material for AHFBs, which exhibits highly negative redox potential, fast electrochemical reaction kinetics and extreme insolubility in aqueous alkaline electrolytes. When operated in a practical hybrid flow cell against a positive electrolyte comprising ferrocyanide salt, the cell displayed an open-circuit voltage of 1.37 V, specific power of 28.4 W g⁻¹ at 100% state of charge (SOC) and energy efficiency of 87.2% at a current density of 10 A g⁻¹ (10.2 mA cm⁻²). The capacity retention rate is among the highest of AHFBs reported to date, at 99.9980% per cycle over 1200 consecutive cycles.

中文翻译：

具有高功率和长循环寿命的有机基水性混合液流电池：四吡啶吩嗪/亚铁氰化物体系

水混合液流电池（AHFB）已经成为用于大规模电能存储的有前途的系统。我们报告了一种稳定的共轭有机化合物四吡啶并吩嗪（TPPHZ），作为AHFBs的活性阳极材料，它表现出高的负氧化还原电位，快速的电化学反应动力学和在碱性水溶液中的极高不溶性。当在实际的混合流动池中针对包含亚铁氰化物盐的正电解质运行时，该池在100％荷电状态（SOC）下显示1.37 V的开路电压，28.4 W g ^-1的比功率和87.2的能量效率电流密度为10 A g ^-1（10.2 mA cm ^-2）。容量保持率是迄今为止报告的最高AHFB之一，在1200个连续循环中，每个循环的容量为99.9980％。

更新日期：2020-04-08

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