Multifunctional anchoring effect enables ultra-stable 3D-printed zinc powder-based anode  

多功能锚定效应助力3D打印超稳定锌粉基阳极

作　　者：Leiqing Cao Fan Bu Yuxuan Wang Yong Gao Wenbo Zhao Jiayu Yang Jipeng Chen Xi Xu Cao Guan 曹镭清;卜凡;王宇轩;高勇;赵文波;杨佳宇;陈继鹏;徐茜;官操

机构地区：[1]Frontiers Science Center for Flexible Electronics,Institute of Flexible Electronics,Northwestern Polytechnical University,Xi’an 710072,China [2]Key laboratory of Flexible Electronics of Zhejiang Province,Ningbo Institute of Northwestern Polytechnical University,Ningbo 315103,China

出　　处：《Science China Materials》2025年第3期897-905,共9页中国科学(材料科学)(英文版)

基　　金：supported by the National Key Research and Development Program of China(2022YFE0121000);Natural Science Foundation of Shaanxi(2022ZY2-JCYJ-01-10);Natural Science Foundation of Xi’an(24ZDCYJSGG0039);Fundamental Research Funds for the Central Universities and Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(CX2024103 and CX2023029).

摘　　要：Zinc powder-based anodes encounter significant challenges,including severe side-reactions and nonuniform Zn plating-stripping processes.These issues lead to poor reversibility and low zinc utilization,which substantially impede their practical applications.Herein,we fabricated a multifunctional carbonyl-containing zinc metharcylate(ZMA)layer on the surface of three-dimensional(3D)zinc powder anode through in-situ modification.The ZMA layer with high electronegativity and highly nucleophilic carbonyl group assists the de-solvation process,which is conducive to the Zn^(2+)transport and homogenization of the ionic flux.In addition,the hydrophobic carbon chains in ZMA work as a protective layer to reduce the Zn powder direct contact with free-water and significantly improving side-reactions resistance.Finally,through the synergistic effect of ZMA and 3D Zn structure,the prepared electrode could cycle stably at 20 mA cm^(-2)/20 mAh cm^(-2) for 1153 h(depth of discharge:38.10%).The stable 3D Zn-MnO_(2) battery with a high capacity retention(84.2%over 500 cycles)is also demonstrated.目前,锌粉基阳极面临着一些严峻的挑战,包括严重的副反应和不均匀的Zn的沉积/剥离.这些问题导致锌负极可逆性差和锌利用率低,严重阻碍了其实际应用.为此,我们在三维(3D)锌粉阳极表面原位制备了含羰基的多功能甲基丙烯酸锌(ZMA)层,这种具有高电负性和高亲核性羰基的ZMA层有助于Zn^(2+)脱溶过程,Zn^(2+)的传输和离子通量的均匀化.此外,ZMA中的疏水碳链起到保护层的作用,减少Zn粉末与自由水的直接接触,显著提高其抗副反应能力.最后,通过ZMA和3D锌结构的协同作用,所制备的电极能够在20 mA cm^(-2)/20 mAh cm^(-2)的条件下稳定循环1153 h(DOD:38.10%).同时还证明了3D锌-二氧化锰电池的稳定性和高容量保持率(500次循环后为84.2%).

关 键 词：Zn anode organic acid 3D printing interface 

分 类 号：O62[理学—有机化学]