Luo Zhixuan, Zhao Yiming, Huyan Yu, Ren Lingbo, Wang Mingyao, Li Xu, Wang Jian-Gan
State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Lab of Graphene (NPU), Xi'an, 710072, China.
Shanxi Research Institute of Huairou Laboratory, Taiyuan, Shanxi, 030031, China.
Small. 2025 Jan;21(4):e2410342. doi: 10.1002/smll.202410342. Epub 2024 Dec 9.
The success of achieving scale-up deployment of zinc ion batteries is to selectively regulate the rapid and dendrite-free growth of zinc anodes. Herein, this is proposed that a creative design strategy of constructing multi-functional separators (MFS) to stabilize the zinc anodes. By in situ decorating metal-organic-framework coating on commercial glass fiber, the upgraded separator is of remarkable benefit for strong anion (SO ) anchoring, uniform ion flux across the interface, and boosted Zn desolvation. Such a feature selectively promotes the Zn transportation efficiency, which enables a high Zn transference number of 0.81, enhanced ionic conductivity, and a superb exchange current density of 12.80 mA cm. Consequently, the zinc anode can be operated stably with an ultra-long service lifetime of over 4800 h in symmetric cells and improved cycling endurance in full batteries. This work paves an attractive pathway to design multi-functional separators with regulated ion flux and selectivity toward high-energy metal batteries beyond zinc chemistry.
实现锌离子电池规模化部署的成功在于选择性地调控锌负极的快速且无枝晶生长。在此，提出了一种构建多功能隔膜（MFS）以稳定锌负极的创新性设计策略。通过在商用玻璃纤维上原位装饰金属有机框架涂层，升级后的隔膜对于强阴离子（SO）锚定、跨界面均匀离子通量以及促进锌去溶剂化具有显著益处。这种特性选择性地提高了锌传输效率，使得锌迁移数高达0.81，离子电导率增强，交换电流密度高达12.80 mA cm。因此，锌负极在对称电池中可稳定运行，超长效使用寿命超过4800小时，并且在全电池中循环耐久性得到改善。这项工作为设计具有调控离子通量和对超越锌化学的高能金属电池具有选择性的多功能隔膜铺平了一条有吸引力的途径。
