He Zhangxing, Li Ruotong, Wang Tingting, Zhao Ningning, Dai Lei, Zhu Jing, Wang Ling
School of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China.
School of Chemical Engineering, North China University of Science and Technology, Tangshan 063210, China.
J Colloid Interface Sci. 2024 Feb;655:717-725. doi: 10.1016/j.jcis.2023.11.032. Epub 2023 Nov 8.
Aqueous Zn ion batteries (AZIBs) are considered to be highly promising rechargeable secondary batteries. However, the growth of zinc dendrites and irreversible side reactions hinder its further application. In this paper, an artificial interfacial protective layer of phenol-formaldehyde resin (PF) was constructed to achieve high-performance zinc anode. There is a strong interaction between hydroxyl groups in PF and Zn ions. This interaction modulates the solvation sheath of Zn ions and promotes the desolvation of [Zn(HO)], which reduces the side reactions induced by reactive HO. Furthermore, the pore structure of PF provides ion-confinement effect to regulate the Zn ions flux, thus reducing the growth of dendrites caused by inhomogeneous deposition. Thus, the PF coating has the dual effect of fast desolvation and ion confinement, which is beneficial to the uniform Zn ions deposition and achieves highly stable zinc anodes. Consequently, the Zn@PF||MnO full cell can be stably cycled for 1500 cycles at 1.5 A/g and the capacity retention remains 82.4 %. This method provides a convenient and practical approach to tackle the problems of zinc anodes, and establishes the foundation for their further application.
水系锌离子电池（AZIBs）被认为是极有前景的可充电二次电池。然而，锌枝晶的生长和不可逆的副反应阻碍了其进一步应用。本文构建了一种酚醛树脂（PF）人工界面保护层以实现高性能锌负极。PF中的羟基与锌离子之间存在强相互作用。这种相互作用调节了锌离子的溶剂化鞘层，促进了[Zn(HO)]的去溶剂化，减少了由活性HO引发的副反应。此外，PF的孔结构提供离子限域效应以调节锌离子通量，从而减少由不均匀沉积导致的枝晶生长。因此，PF涂层具有快速去溶剂化和离子限域的双重作用，有利于锌离子均匀沉积并实现高度稳定的锌负极。结果，Zn@PF||MnO全电池在1.5 A/g电流密度下可稳定循环1500次，容量保持率为82.4%。该方法为解决锌负极问题提供了一种便捷实用的途径，并为其进一步应用奠定了基础。
