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Ultrastable aqueous phenazine flow batteries with high capacity operated at elevated temperatures
Joule ( IF 39.8 ) Pub Date : 2021-07-22 , DOI: 10.1016/j.joule.2021.06.019
Jiancong Xu 1, 2 , Shuai Pang 1, 2 , Xinyi Wang 1, 2 , Pan Wang 1, 2 , Yunlong Ji 3, 4
Affiliation  

Aqueous organic redox flow batteries (AORFBs) permit us to utilize renewable energy through organic redox-active materials. While long cell-cycling lifetime has been aspired in AORFBs at room temperature, the exploration of robust organic molecules with thermal stability for energy storage, especially in sunlight-rich areas with elevated temperature, is of vital importance. In the present work, we demonstrate an extremely stable AORFB with high capacity based on propionic-acid-functionalized phenazine (PFP) at both room and elevated temperatures. The full redox-flow battery based on 1,8-PFP with 2.0 M electron concentration in 1.0 M KOH against ferrocyanide presents an OCV of 1.15 V, and no capacity fade is observed when cycled at 45°C for 53 days, which is among the best capacity retention reported so far. These results demonstrate great promise of PFPs for future energy-storage technology in tough conditions with high temperature and strong alkaline solutions.



中文翻译:

在高温下运行的具有高容量的超稳定水性吩嗪液流电池

水性有机氧化还原液流电池 (AORFB) 使我们能够通过有机氧化还原活性材料利用可再生能源。虽然 AORFBs 在室温下希望获得长的细胞循环寿命,但探索具有热稳定性的强大有机分子用于储能,尤其是在阳光充足且温度升高的地区,具有至关重要的意义。在目前的工作中,我们展示了一种基于丙酸功能化吩嗪 (PFP​​) 在室温和高温下具有高容量的极其稳定的 AORFB。基于1,8-PFP的全氧化还原液流电池在 1.0 M KOH 中具有 2.0 M 电子浓度的亚铁氰化物表现出 1.15 V 的 OCV,并且在 45°C 下循环 53 天时未观察到容量衰减,这是迄今为止报道的最佳容量保持率之一。这些结果证明了 PFP 在高温和强碱性溶液的恶劣条件下对未来储能技术的巨大希望。

更新日期:2021-09-15
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