Tian Zhengnan, Kale Vinayak S, Thomas Simil, Kandambeth Sharath, Nadinov Issatay, Wang Yizhou, Wahyudi Wandi, Lei Yongjiu, Emwas Abdul-Hamid, Bonneau Mickaele, Shekhah Osama, Bakr Osman M, Mohammed Omar F, Eddaoudi Mohamed, Alshareef Husam N
Materials Science and Engineering, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
Center for Renewable Energy and Storage Technologies (CREST), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
Adv Mater. 2024 Nov;36(47):e2409354. doi: 10.1002/adma.202409354. Epub 2024 Sep 30.
Aqueous ammonium ion batteries have garnered significant research interest due to their safety and sustainability advantages. However, the development of reliable ammonium-based full batteries with consistent electrochemical performance, particularly in terms of cycling stability, remains challenging. A primary issue stems from the lack of suitable anode materials, as the relatively large NH ions can cause structural damage and material dissolution during battery operation. To address this challenge, an Aza-based covalent organic framework (COF) material is introduced as an anode for aqueous ammonium ion batteries. This material exhibits superior ammonium storage capabilities compared to existing anode materials. It operates effectively within a negative potential range of 0.3 to‒1.0 V versus SCE, achieves high capacity even at elevated current densities (≈74 mAh g at 10 A g), and demonstrates exceptional stability, retaining a capacity over 20 000 cycles at 1.0 A g. Furthermore, by pairing this COF anode with a Prussian blue cathode, an ammonium rocking-chair full battery is developedd that maintains 89% capacity over 20 000 cycles at 1.0 A g, surpassing all previously reported ammonium ion full batteries. This study offers insights for the design of future anodes for ammonium ion batteries and holds promise for high-energy storage solutions.
水系铵离子电池因其安全和可持续性优势而引起了广泛的研究兴趣。然而，开发具有一致电化学性能的可靠铵基全电池，特别是在循环稳定性方面，仍然具有挑战性。一个主要问题源于缺乏合适的负极材料，因为相对较大的NH 离子在电池运行过程中会导致结构破坏和材料溶解。为了应对这一挑战，一种基于氮杂环的共价有机框架（COF）材料被引入作为水系铵离子电池的负极。与现有的负极材料相比，这种材料具有优异的铵存储能力。它在相对于饱和甘汞电极（SCE）为0.3至 -1.0 V的负电位范围内有效运行，即使在高电流密度下（10 A g时约为74 mAh g）也能实现高容量，并表现出卓越的稳定性，在1.0 A g下循环超过20000次仍能保持容量。此外，通过将这种COF负极与普鲁士蓝正极配对，开发出了一种铵离子摇椅式全电池，该电池在1.0 A g下循环20000次后仍能保持89%的容量，超过了此前报道的所有铵离子全电池。这项研究为未来铵离子电池负极的设计提供了见解，并有望实现高能量存储解决方案。
