Wang Dun, Hu Sanlue, Li Titi, Chang Caiyun, Li Senlin, Guo Songde, Li Huan, Liu Qingming, Gong Jinqiu, Zhou Jun, Han Cuiping
Faculty of Materials Science and Energy Engineering, Shenzhen University of Advanced Technology, Shenzhen, China.
Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
Nat Commun. 2025 Jan 2;16(1):259. doi: 10.1038/s41467-024-55153-6.
Aqueous zinc ion batteries exhibit great prospects due to their low cost and high safety, while their lifespan is limited by severe dendritic growth problems. Herein, we develop an anti-dendrite hot-pressing separator interlayer through a mass-producible hot-pressing strategy, by spreading metal-organic framework (MOF) precursor on nonwoven matrix followed by a simple hot-pressing process. The in situ modification of MOF crystals on fiber surface processes abundant nitrogenous functional groups and high specific surface area (190.8 m g) with a strong attraction to Zn. These features contribute to a staged deposition behavior to promote uniform nucleation at high concentrations and two-dimensional grain growth at low concentrations. Consequently, Zn | |Zn symmetrical cells with hot-pressing separator interlayer demonstrate cycle lives of 3000 hours at 2 mA cm, 2 mAh cm. Moreover, Zn | |I pouch batteries with hot-pressing separator interlayer realizes 840 cycles lifespan with a capacity retention of 90.9% and a final discharge capacity of 110.6 mAh at 25 °C.
水系锌离子电池因其低成本和高安全性而展现出广阔前景，但其寿命受到严重的枝晶生长问题限制。在此，我们通过一种可大规模生产的热压策略开发了一种抗枝晶热压隔膜夹层，即在非织造基体上涂覆金属有机框架（MOF）前驱体，随后进行简单的热压工艺。MOF晶体在纤维表面的原位改性过程产生了丰富的含氮官能团和高比表面积（190.8 m²/g），对锌具有强烈吸引力。这些特性有助于形成分级沉积行为，以促进高浓度下的均匀成核和低浓度下的二维晶粒生长。因此，具有热压隔膜夹层的Zn||Zn对称电池在2 mA cm⁻²、2 mAh cm⁻²条件下展现出3000小时的循环寿命。此外，具有热压隔膜夹层的Zn||I软包电池在25°C下实现了840次循环寿命，容量保持率为90.9%，最终放电容量为110.6 mAh。
