Magneto-Electric Coupling Effects Enable Structurally and Electrochemically Stable Interface for Long-Lasting Anode-Free Sodium Metal Batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 42067520.
- Also identified by DOI 10.1021/acs.nanolett.6c00987.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The limited cycle life of anode-free sodium metal batteries (AFSMBs) remains a key obstacle to practical application, largely due to the mechanical and electrochemical instability of modified current-collector interfaces. Here, we report a magneto-electric coupling strategy to construct structurally robust and sodiophilic multicomponent alloy current collectors. Zn-containing alloy phases lower the Na nucleation barrier and mitigate volume strain. Fe/Co/Ni-based ferromagnetic phases introduce Lorentz-force regulation of Na<sup>+</sup> flux, and Cu provides mechanical buffering and improved interfacial compatibility. Benefiting from this synergistic design, symmetric cells deliver stable Na plating/stripping for over 3500 h at 1 mA cm<sup>-2</sup> and 1 mAh cm<sup>-2</sup>, while anode-free full cells retain 60% of their capacity after 200 cycles at 5 C. This study presents a promising pathway for developing long-life anode-free sodium metal batteries through stabilizing the interface of current collectors.