Abstract:Aqueous zinc ion batteries are regarded as one of the most promising next-generation energy storage batteries due to their low cost and high safety. However, the inherent shortcomings of zinc anode, dendrite growth and chemical corrosion, lead to low coulomb efficiency and poor cycling performance of batteries, which limit the commercialization process of zinc ion batteries. In this work, zinc gluconate (ZG), as a new bi-functional electrolyte, was used to modify the zinc anode, and stabilize the zinc anode. The morphology and structure of the electrode materials were characterized by scanning electron microscope (SEM) and X-ray diffractometer (XRD). The electrochemical properties were studied in detail by constant current charge-discharge test and electrochemical impedance spectroscopy. The results showed that adding zinc gluconate to the electrolyte could inhibit the growth and chemical corrosion of zinc negative dendrites. In the electrolyte containing ZG additive, the zinc anode could be stably cycled for 600 weeks at the current density of 1 mA/cm2. Zn||V2O5 full batteries in the current density of 1 A/g reached stable cycling time of 500 weeks with reversible specific capacity of 81.8 mAh/g. The electrolyte additive gave the battery high reversibility and stability. A low-cost, simple and effective zinc anode modification strategy was provided for realizing the large-scale application of stable water zinc ion batteries.