Suppr超能文献

用于水系锌离子电池长期稳定性的协同梯度阳极

Synergistic Gradient Anodes for Long-Term Stability in Aqueous Zinc-Ion Batteries.

作者信息

Ye Jiahui, Tian Wen, Du Yuping, Linghu Shaoyong, Wang Kaixiang, Yuan Li, Li Hongjiao, Ji Junyi

机构信息

School of Chemical Engineering, Sichuan University, Chengdu, 610065, P. R. China.

State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China.

出版信息

Small. 2024 Dec;20(50):e2405891. doi: 10.1002/smll.202405891. Epub 2024 Sep 30.

Abstract

The stability of aqueous zinc metal anodes is still constrained by their severe dendrite growth. Optimizing electric field distribution and crystallography to modulate the diffusion and deposition behavior of zinc ions can effectively suppress dendrite growth. However, the fabrication strategy to directly endow specific textured zinc anodes with gradient electric field distribution is still lacking. Herein, a strategy combining crystal reconstruction of commercial zinc foil with graphene oxide (GO) protective layer is proposed to construct an in situ gradient electric field-enhanced strong (002) textured GO@ZnO/Zn(002) anode. Based on the experimental and theoretical results, the GO protective layer can regulate a wide-range homogeneous Zn ions flow, while the dense and uniform ZnO/Zn(002) nanoneedles /nanoparticles can enhance localized polarized electric field to accelerate rapid localized transfer of Zn ions and guide them toward directional deposition along (002) plane. Therefore, the hierarchical GO@ZnO/Zn(002) anode enables the symmetric cell to operate continuously and stably for 5700 and 4200 h at 2 and 4 mA cm, respectively, which is comparable to or better than most high-end Zn anodes. This work presents new insights into the zinc foil reconstruction and gradient electric field fabrication strategy, offering a scalable approach for the development of long-term stable metal anodes.

摘要

水系锌金属负极的稳定性仍受严重枝晶生长的限制。优化电场分布和晶体结构以调节锌离子的扩散和沉积行为可有效抑制枝晶生长。然而,直接赋予特定织构化锌负极梯度电场分布的制备策略仍很缺乏。在此,提出一种将商用锌箔的晶体重构与氧化石墨烯(GO)保护层相结合的策略,以构建原位梯度电场增强的强(002)织构化GO@ZnO/Zn(002)负极。基于实验和理论结果,GO保护层可调节宽范围均匀的锌离子流动,而致密且均匀的ZnO/Zn(002)纳米针/纳米颗粒可增强局部极化电场,以加速锌离子的快速局部转移并引导其沿(002)平面进行定向沉积。因此,分级结构的GO@ZnO/Zn(002)负极使对称电池在2和4 mA cm下分别能连续稳定运行5700和4200 h,这与大多数高端锌负极相当或更优。这项工作为锌箔重构和梯度电场制备策略提供了新的见解,为开发长期稳定的金属负极提供了一种可扩展的方法。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验