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Multiple Redox Site π-Conjugated Materials for Aqueous Aluminum–Organic Battery Cathodes
ACS Energy Letters ( IF 19.3 ) Pub Date : 2024-08-12 , DOI: 10.1021/acsenergylett.4c01818 Changde Hu 1 , Yong Lu 1 , Hanqing Gu 1 , Wenming Zhang 1 , Zhanyu Li 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2024-08-12 , DOI: 10.1021/acsenergylett.4c01818 Changde Hu 1 , Yong Lu 1 , Hanqing Gu 1 , Wenming Zhang 1 , Zhanyu Li 1
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In the field of rechargeable aqueous aluminum batteries (AABs), carbonyl- and imine-based organic materials have received much attention due to their design flexibility. However, such materials usually face problems such as low capacity and poor stability. For this reason, a simple dehydration condensation method was employed to design a redox-active organic material (ROM)-BQPT (benzo[i]benzo[6,7]quinoxalino[2,3,9,10]phenanthrol[4,5-abc]phenazine-5,10,16,21-tetraone) of π-conjugated structure enriched with multiple C=O and C=N groups. Due to the introduction of more redox-active sites, BQPT can provide an extremely striking capacity of 396.4 mAh g–1 at 0.2 A g–1. Additionally, the abundant π–π structural interactions endowed BQPT with good structural stability and low solubility. In addition, further theoretical calculations confirm that the reorganization of the electron cloud and the expansion of the π-conjugated ligand improve the redox kinetics of BQPT. Combined with ex situ characterizations, its reaction mechanism with Al(OTF)2+ was elucidated. This study provides a significant reference for the design of new types of ROMs.
中文翻译：
用于水系铝有机电池正极的多氧化还原位点π共轭材料
在可充电水系铝电池（AAB）领域，羰基和亚胺基有机材料由于其设计灵活性而备受关注。但此类材料通常面临容量低、稳定性差等问题。为此，采用简单的脱水缩合方法设计了氧化还原活性有机材料（ROM）-BQPT（苯并[i]苯并[6,7]喹喔啉[2,3,9,10]菲酚[4,5] -abc]吩嗪-5,10,16,21-四酮），具有富含多个 C=O 和 C=N 基团的 π 共轭结构。由于引入了更多的氧化还原活性位点，BQPT 可在 0.2 A g –1下提供 396.4 mAh g –1的极其惊人的容量。此外，丰富的π-π结构相互作用赋予BQPT良好的结构稳定性和低溶解度。此外，进一步的理论计算证实电子云的重组和π共轭配体的扩展改善了BQPT的氧化还原动力学。结合非原位表征，阐明了其与Al(OTF) 2 + 的反应机理。该研究为新型ROM的设计提供了重要的参考。
更新日期：2024-08-12
中文翻译：
用于水系铝有机电池正极的多氧化还原位点π共轭材料
在可充电水系铝电池（AAB）领域，羰基和亚胺基有机材料由于其设计灵活性而备受关注。但此类材料通常面临容量低、稳定性差等问题。为此，采用简单的脱水缩合方法设计了氧化还原活性有机材料（ROM）-BQPT（苯并[i]苯并[6,7]喹喔啉[2,3,9,10]菲酚[4,5] -abc]吩嗪-5,10,16,21-四酮），具有富含多个 C=O 和 C=N 基团的 π 共轭结构。由于引入了更多的氧化还原活性位点，BQPT 可在 0.2 A g –1下提供 396.4 mAh g –1的极其惊人的容量。此外，丰富的π-π结构相互作用赋予BQPT良好的结构稳定性和低溶解度。此外，进一步的理论计算证实电子云的重组和π共轭配体的扩展改善了BQPT的氧化还原动力学。结合非原位表征，阐明了其与Al(OTF) 2 + 的反应机理。该研究为新型ROM的设计提供了重要的参考。
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