High-potential and Stable Bipolar Cathode for Rechargeable Batteries with Fast-charging and Wide-temperature Adaptability

IF 16.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Angewandte Chemie International Edition Pub Date : 2024-11-03 DOI:10.1002/anie.202416874
Haotian Wang, Gaopan Liu, Wen Zhou, Yonggang Wang, Xiaoli Dong
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Abstract

Organic carbonyl compounds have been recognized as promising electrodes due to multiple active sites, abundant element resources and flexible structural designability, while their practical applications are still hindered by the easy solubility and low discharge potential. Herein, a novel bipolar polymer composite (TAC) was well-designed by grafting p-type triphenylamine units onto n-type anthraquinone to form an extended π-conjugated structure and in-situ growing on carbon nanotubes, which was proved not only with higher discharge potential but also effectively suppress the dissolution issues. Moreover, TAC combined the advantages of different active sites and behaved a dual-ion storage mechanism. Benefitting from the in-situ polymerization process, TAC with tube-type core-shell structure exhibited enhanced electron transport and improved utilization of active sites, resulting in high capacity (193 mAh g-1), outstanding rate performance (fast charging within 17 s), long-term stability (a high capacity retention of 87% after 1000 cycles) and high mass loading (10 mg cm-2). Additionally, TAC can well adapt to the temperature change, outputting a capacity of 72 mAh g-1 at -60 °C and 165 mAh g-1 at 80 °C. Such versatile polymer structure inspires the design of high performance organic materials for rechargeable batteries to satisfy high stability and wide temperature operations.
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具有快速充电和宽温适应性的可充电电池用高电位稳定双极阴极
有机羰基化合物因具有多个活性位点、丰富的元素资源和灵活的结构可设计性,已被公认为具有发展前景的电极,但其易溶解性和低放电电位仍阻碍了其实际应用。本文通过将 p 型三苯胺单元接枝到 n 型蒽醌上形成扩展的 π 共轭结构,并在碳纳米管上原位生长,设计出了一种新型双极聚合物复合材料(TAC),不仅具有较高的放电电位,还能有效抑制溶解问题。此外,TAC 结合了不同活性位点的优势,具有双重离子存储机制。得益于原位聚合工艺,具有管型核壳结构的 TAC 增强了电子传输能力,提高了活性位点的利用率,从而实现了高容量(193 mAh g-1)、卓越的速率性能(17 秒内快速充电)、长期稳定性(1000 次循环后容量保持率高达 87%)和高负载质量(10 mg cm-2)。此外,TAC 还能很好地适应温度变化,在 -60 °C 时输出 72 mAh g-1 的容量,在 80 °C 时输出 165 mAh g-1 的容量。这种多功能聚合物结构激发了人们设计高性能有机充电电池材料的灵感,以满足高稳定性和宽温操作的要求。
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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
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