东北师范大学朱广山团队报道了具有空气自充电性能的，低温Zn–K水性混合电池中氧化还原活性多孔芳香框架的电子离域调谐。2024年4月15日出版的《德国应用化学》杂志发表了这项成果。

空气自充电水性电池有望集成能量收集技术和电池系统，有可能克服对能源和时空环境的严重依赖。然而，使用有前景的阴极材料和合适的电荷载体，开发多功能空气自充电电池系统仍然具有挑战性。

该文中，研究人员首次开发了低温自充电水性Zn-K混合离子电池（AZKHBs），使用完全共轭的六氮杂壬苯（HATN）基多孔芳香骨架作为阴极材料，表现出使用K⁺作为电荷载体的氧化还原化学，并调节锌离子溶剂化化学以引导均匀的锌电镀/剥离。独特的AZKHBs在所有气候条件下都表现出非凡的电化学性能。

最重要的是，大的电势差导致AZKHBs放电的阴极被氧氧化，从而在没有外部电源的情况下启动自充电过程。令人印象深刻的是，空气自充电AZKHBs可以实现1.15 V的最大电压、令人印象深刻（466.3 mA h g^-1）的放电容量，以及即使在–40°C下也能实现卓越的自充电性能。因此，自充电AZKHBs的开发为在恶劣环境或偏远地区缺乏电网所带来的限制提供了一种解决方案。

附：英文原文

Title: Tuning Electron Delocalization of Redox-Active Porous Aromatic Framework for Low-Temperature Aqueous Zn–K Hybrid Batteries with Air Self-Chargeability

Author: Junhao Wang, Xupeng Zhang, Zhaoli Liu, Jie Yu, Heng-Guo Wang, Xing-Long Wu, Fengchao Cui, Guangshan Zhu

Issue&Volume: 2024-04-15

Abstract: Air self-charging aqueous batteries promise to integrate energy harvesting technology and battery systems, potentially overcoming a heavy reliance on energy and the spatiotemporal environment. However, the exploitation of multifunctional air self-charging battery systems using promising cathode materials and suitable charge carriers remains challenging. Herein, for the first time, we developed low-temperature self-charging aqueous Zn-K hybrid ion batteries (AZKHBs) using a fully conjugated hexaazanonaphthalene (HATN)-based porous aromatic framework as the cathode material, exhibiting redox chemistry using K+ as charge carriers, and regulating Zn-ion solvation chemistry to guide uniform Zn plating/stripping. The unique AZKHBs exhibit the exceptional electrochemical properties in all-climate. Most importantly, the large potential difference causes the AZKHBs discharged cathode to be oxidized using oxygen, thereby initiating a self-charging process in the absence of an external power source. Impressively, the air self-charging AZKHBs can achieve a maximum voltage of 1.15 V, an impressive discharge capacity (466.3 mA h g-1), and exceptional self-charging performance even at –40 °C. Therefore, the development of self-charging AZKHBs offers a solution to the limitations imposed by the absence of a power grid in harsh environments or remote areas.

DOI: 10.1002/anie.202401559

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202401559