Mxene Modified Anode of Magnesium Battery to Improve the Problems of Voltage Lag and Reversible

Abstract

As a kind of clean energy, magnesium batteries have become the main research direction of next-generation batteries. A long voltage lag time and irreversibility in aqueous electrolytes are problems faced by magnesium aqueous batteries. For the first time, we modified the anode of a magnesium aqueous battery with MXene. The modified battery not only reduced the voltage lag time of the battery but also improved the reversibility, cycle stability and intermittent discharge performance of the magnesium aqueous battery. Combined with the calculation results of molecular dynamics, the MXene film has a strong adsorption energy for Mg ions, thus improving the transmission rate of Mg ions in the battery. This research is of great significance to the development and application of magnesium batteries.

Keywords: Magnesium aqueous battery, MXene film, Voltage lag, Reversibility, Discharge