Preparation of two-dimensional material Ti3C2Tx and its effect on the electrochemical performance of zinc-ion batteries
To address the dendrite growth and side reaction between zinc metal anode and electrolyte,MXene(Ti3C2Tx)with accordion layered structure was obtained by etching MAX(Ti3AlC2)with hydrofluoric acid.Investigation was performed to study the effect of different etching durations on the surface morphology of materials.The MXene was coated on the surface of zinc foil by scraper to make a protective layer with good mechanical strength and high conductivity,which was then assembled to make a coin cell battery for a series of material characterization and electrochemical tests.The results show that the etching duration has a significant impact on the morphology of materials.At etching time of 48 h,the MXene@Zn||Cu half-cell can maintain stable for 400 cycles,and the Coulombic efficiency can retain above 99.6％.The MXene@Zn||MXene@Zn symmetrical battery can be stable after 400 hours at a current density of 1 mA·cm-2.The full cell with the NH4V4O10 as the positive electrode can still deliver a high specific capacity close to 200 mAh·g-1 after 600 cycles at a current density of 3 A·g-1.
MXeneetchingzinc-ion batteriesscraper methodartificial SEI
万方数据
