材料科学
阳极
化学工程
金属
锡
涂层
动力学
电介质
扩散阻挡层
纳米技术
电极
冶金
图层(电子)
光电子学
物理化学
化学
物理
量子力学
工程类
作者
Kai Zhang,Caixia Li,Weiping Liu,Shenghao Zhang,Minghui Wang,Lei Wang
出处
期刊:Small
[Wiley]
日期:2023-11-21
标识
DOI:10.1002/smll.202306406
摘要
Interface engineering attracted tremendous attention owing to its remarkable ability to impede dendrite growth and side reactions in aqueous zinc-ion batteries. Artificial interface layers composed of crystalline materials have been extensively employed to stabilize the Zn anode. However, the diffusion kinetics of Zn2+ in highly crystalline materials are hindered by steric effects from the lattice, thereby limiting the high-rate performance of the cell. Here, defect-rich HfO2-x polycrystals derived from metal-organic frameworks (MOFs) (D-HfO2-x ) are developed to enhance the Zn deposition behavior. The discrepancy of dielectric constants between metallic Zn and HfO2 enables the building of an electrostatic shielding layer for uniform Zn deposition. More importantly, the oxygen vacancies in D-HfO2-x provide abundant active sites for Zn2+ adsorption, accelerating the kinetics of Zn2+ migration, which contributes to the preferential exposure of the Zn (002) plane during plating. Consequently, the D-HfO2-x -modified Zn anode delivers ultrastable durability of over 5000 h at 1 mA cm-2 and a low voltage hysteresis of 30 mV. The constructed defective coating provides a guarantee for the stable operation of Zn anodes, and the innovative approach of defective engineering also offers new ideas for the protection of other energy storage devices.
科研通智能强力驱动
Strongly Powered by AbleSci AI