Work

Interphase Self‐Optimization Enables Stable Magnesium Anode in Hydrogel Electrolyte

Year: 2026

Type: article

Abstract: ABSTRACT Magnesium metal is a promising anode material for high‐energy and cost‐effective aqueous batteries, but the issue associated with corrosion reaction and surface passivation is more severe than the commonly studied metals such as Zn. Current strategies either rely on aggressively dissolving corrosion products with the sacrifice of active metal or attempt to suppress passivation with limited effect. In this work, a dynamic evolution of a self‐optimized interphase on the Mg anode surface is triggered through formulating a tridentate chelant and MgCl 2 based hydrogel electrolyte. At the anode‐electrolyte interface, chelant‐mediated solvation mitigates the water‐induced parasitic reactions, kinetically enabling a complete conversion of the MgO byproduct into a magnesium oxychloride interphase. This interphase is dynamic stable and Mg 2+ ‐conductive, rendering reversible Mg plating/stripping for over 600 h at 0.1 mA cm −2 in symmetric cells. Furthermore, 2 V‐class hybrid cells by paring the Mg anode with three different cathodes show stable charges and discharges up to 500 cycles (capacity retention is 69%).

Source: Advanced Materials

DOI: 10.1002/adma.72904

Authors: Xinyuan Zhang, Hengyue Xu, Heng Jiang, Fei Du, Hong Jin Fan

Institutions: Nanyang Technological University, Jilin University, State Key Laboratory of High Pressure and Superhard Materials, Tsinghua University

Language: English

Topic: Advanced battery technologies research

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $6,070