Year: 2025
Type: article
Abstract: Aqueous zinc ion batteries have attracted enormous attention for their application in large‐scale energy storage. However, severe Zn dendrite is generated during cycling due to the poor deposition/diffusion kinetics and inhomogeneous Zn 2+ diffusion. Herein, a new approach combining magnetohydrodynamics (MHD) and magnetization effect is proposed to understand the Zn 2+ deposition/dissolution mechanism under an external magnetic field, in which zeolite‐anchored paramagnetic Co 3 O 4 is constructed on Zn anode|electrolyte interface. Co 3 O 4 is magnetized with the generation of abundant MHD micro‐regions (Micro‐MHD) by an external magnetic field, which enables the stability of Zn anode. The magnetized Co 3 O 4 effectively enhances the charge transfer on Zn anode|electrolyte interface, improving Zn 2+ deposition/diffusion kinetics. Affected by Micro‐MHD, the electrolyte is stirred by spiraling Zn 2+ . This feature ensures the rapid and dynamic interfacial diffusion to eliminate concentration gradient. The obtained results highlight the uniform Zn 2+ diffusion driven by Micro‐MHD for achieving stable cycling over 1200 h at 5 mA cm −2 , while maintaining stable Zn 2+ plating/stripping process at a high depth of discharge (DOD = 57%). The Zn||V 2 O 5 ·H 2 O pouch cell exhibits a high capacity and capacity retention for 500 cycles at 1 A g −1 . This work provides a new insight for realizing stable Zn anode.
Source: Advanced Functional Materials
Institutions: Shanghai University, Fudan University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4410131399