首页
最新动态 交流合作 科研项目 论文著作 精彩瞬间 招生招聘
  • [Angew. Chem. Int. Ed.] Strategic Nitrogen Site Alignment in Covalent Organic Frameworks for Enhanced Performance in Aqueous Zinc-Iodide Batteries
  • 来源:张宁教授个人网站 2025-01-18
  • Aqueous zinc-iodine batteries (AZIBs) are gaining attentionas next-generation energy storage systems due to their hightheoretical capacity, enhanced safety, and cost-effectiveness.However, their practical application is hindered by challenges such asslow reaction kinetics and the persistent polyiodide shuttle effect. Toaddress these limitations, we developed a novel class of covalentorganic frameworks (COFs) featuring electron-rich nitrogen sites withvaried density and distribution (N1-N4) along the pore walls. Thesenitrogen sites enhance iodine species confinement and masstransport. Our experimental and theoretical studies reveal that thecontinuous and optimized distribution of nitrogen sites within the COFstructure significantly reduces internal resistance and boosts redoxactivity. Moreover, the N4-COF demonstrates superior performancecompared to other porous materials, due to its high density andstrategic alignment of active sites. The I2@N4-COF cathode achievesa remarkable specific capacity of 348 mAh g?1at 1 C, almost 1.8 timesgreater than that of the I2@N1-COF, while also maintaining excellentcycling stability. This integration of a porous framework with alignednitrogen sites in the N4-COF structure not only enhances iodine redoxbehavior but also offers a promising design strategy for developinghigh-performance AZIB electrodes.


    https://onlinelibrary.wiley.com/doi/10.1002/anie.202423265

  • [来源:中国聚合物网]
  • 了解更多请进入: 张宁教授个人网站
相关新闻
  • · [Small] Efficient Ion Screening Boosted by MOF/COF Bilayer Membrane Through Multiple Separation Mechanisms
  • · [Angew. Chem. Int. Ed.] Enhancing Efficiency and Durability of Perovskite Solar Cells with Chlorine-Functionalized Fully Conjugated Porous Aromatic Framework
  • · [Angew. Chem. Int. Ed.] Ultrathin Free-Standing Porous Aromatic Framework Membranes for Efficient Anion Transport
  • · [Small] Continuous Ultrathin Zwitterionic Covalent Organic Framework Membrane Via Surface-Initiated Polymerization Toward Superior Water Retention

关于我们  |  联系我们  

网站:中国聚合物网

polymer.cn Copyright ©2017