Constructing Symmetric All-Organic Proton Battery via Scalable Flux Synthesis of Vinylene-Linked Covalent Organic Frameworks

IF 15.6 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Fengdong Wang, , , Qingxue Ma, , , Shaochun Wu, , , Yi Yang, , , Xiyuan Wang, , , Yao Chen, , , Peng Cheng, , and , Zhenjie Zhang*, 
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Abstract

The design and assembly of symmetric all-organic batteries, eliminating the need for distinct cathode/anode materials while maintaining comparable energy storage performance, has been a highly sought-after objective but has barely been achieved with both high capacity and long-term stability. Herein, we design and synthesize two pyrazino[2,3-g]quinoxaline core-based vinylene-linked covalent organic frameworks (COFs) via the flux synthesis method, featuring two-step redox reactions due to the distinct chemical environments of adjacent C═N groups, to fabricate a symmetric all-organic proton battery, which was confirmed by the mechanism study. The assembled COF-based all-organic battery exhibits excellent performance, with good specific capacity (147 mAh g–1 at 0.1 A g–1) and maximum energy density (87 Wh/kg) with over 5000 cycles at high current density, among the best of the reported all-organic proton batteries. The flux synthesis method facilitates the gram-scale production of COFs, enabling their successful assembly into functional pouch cells. As a result, the assembled pouch cell delivers a reversible maximum capacity of 92 mAh g–1 at 0.1 A g–1, corresponding to a total capacity of 0.92 Ah, approaching the theoretical design capacity. This work inspires the design of all-organic proton batteries and promotes practical application of COFs in the future.

Abstract Image

用可扩展通量合成乙烯链共价有机骨架构建对称全有机质子电池。
对称全有机电池的设计和组装,消除了对不同阴极/阳极材料的需求,同时保持相当的能量存储性能,一直是一个备受追捧的目标,但几乎没有实现高容量和长期稳定性。本文采用通量合成方法设计并合成了两个吡嗪[2,3-g]喹诺啉核心基乙烯连接共价有机框架(COFs),由于相邻C = N基团的化学环境不同,具有两步氧化还原反应,制备了对称的全有机质子电池,并通过机理研究证实了这一点。组装的cof基全有机电池表现出优异的性能,具有良好的比容量(0.1 A g-1时147 mAh g-1)和最大能量密度(87 Wh/kg),在高电流密度下循环超过5000次,是目前报道的全有机质子电池中最好的。通量合成方法促进了COFs的克级生产,使其能够成功组装成功能袋细胞。因此,组装的袋状电池在0.1 a g-1时提供了92 mAh g-1的可逆最大容量,对应于0.92 Ah的总容量,接近理论设计容量。这项工作对全有机质子电池的设计具有启发意义,并促进了COFs在未来的实际应用。
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来源期刊
CiteScore
24.40
自引率
6.00%
发文量
2398
审稿时长
1.6 months
期刊介绍: The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.
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