Bio-Inspired Isoalloxazine Redox Moieties for Rechargeable Aqueous Zinc-Ion Batteries.,Chemistry - An Asian Journal

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Bio-Inspired Isoalloxazine Redox Moieties for Rechargeable Aqueous Zinc-Ion Batteries.
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-03-23 , DOI: 10.1002/asia.202000283
Liwei Cheng ₁ , Yanhong Liang ₂ , Qiaonan Zhu ₁ , Dandan Yu ₁ , Mengxue Chen ₁ , Junfei Liang ₃ , Hua Wang ₁

Affiliation

Organic electrode materials hold great potential for fabricating sustainable energy storage systems, however, the development of organic redox-active moieties for rechargeable aqueous zinc-ion batteries is still at an early stage. Here, we report a bio-inspired riboflavin-based aqueous zinc-ion battery utilizing an isoalloxazine ring as the redox center for the first time. This battery exhibits a high capacity of 145.5 mAh g-1 at 0.01 A g-1 and a long-life stability of 3000 cycles at 5 A g-1 . We demonstrate that isoalloxazine moieties are active centers for reversible zinc-ion storage by using optical and photoelectron spectroscopies as well as theoretical calculations. Through molecule-structure tailoring of riboflavin, the obtained alloxazine and lumazine molecules exhibit much higher theoretical capacities of 250.3 and 326.6 mAh g-1 , respectively. Our work offers an effective redox-active moiety for aqueous zinc batteries and will enrich the valuable material pool for electrode design.

中文翻译：

受生物启发的异四恶嗪氧化还原部分，用于可充电水性锌离子电池。

有机电极材料在制造可持续的能量存储系统方面具有巨大潜力，但是，用于可充电水性锌离子电池的有机氧化还原活性部分的开发仍处于早期阶段。在这里，我们首次报道了以异黄恶嗪环为氧化还原中心的生物启发的基于核黄素的水性锌离子电池。该电池在0.01 A g-1时表现出145.5 mAh g-1的高容量，在5 A g-1时表现出3000次循环的长寿命稳定性。我们通过使用光学和光电子能谱以及理论计算证明了异恶嗪部分是可逆锌离子存储的活性中心。通过核黄素的分子结构剪裁，所得的恶恶嗪和lumazine分子显示出更高的理论容量，分别为250.3和326.6 mAh g-1，分别。我们的工作为水性锌电池提供了有效的氧化还原活性部分，并将丰富用于电极设计的宝贵材料。

更新日期：2020-04-22

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