Despite impressive merits of low-cost and high-safety electrochemical energy storage for aqueous zinc ion batteries, researchers struggled long against unsolved issues of dendrite growth and side reactions of zinc metal anode. Herein, a new strategy of zinc-electrolyte interface charge engineering induced by amino acid additive is demonstrated for highly reversible zinc plating/stripping. Through electrostatic preferential absorption of positively charged arginine molecules on the surface of zinc metal anode, a self-adaptive zinc-electrolyte interface is established for the inhibition of water adsorption/hydrogen evolution and the guidance of uniform zinc deposition. Consequently, an ultra-long stable cycling up to 2200 hours at a high current density of 5 mA cm-2 is achieved under an areal capacity of 4 mAh cm-2. Even cycled at an ultra-high current density of 10 mA cm-2, 900 hours-long stable cycling is still demonstrated, indicating a reliable self-adaptive feature of zinc-electrolyte interface. This work provides a new perspective of interface charge engineering in realizing highly reversible bulk zinc anode that could prompt its practical application in aqueous rechargeable zinc batteries.
|Journal||Advanced Functional Materials|
|Publication status||Accepted/In press - 26 Jul 2021|