Abstract
Aqueous Zn-ion batteries(AZIBs)have emerged as potential candidates for Li-ion batteries due to their intrinsic safety and high capacity.However,metallic Zn anodes encounter dendrite growth and water-induced corrosion,rendering poor stability and severe irreversibility at the electrode/electrolyte interface during cycling.To stabilize the Zn anode,we report a low-cost and effective nonionic surfactant,Tween-20 polymer,as an electrolyte additive for AZIBs.For Tween-20,sequential oxyethylene groups tended to be preferentially adsorbed on the Zn electrode to form a shielding layer for regulating uniform Zn nucleation.Moreover,the hydrophobic hendecyl chains prevented H2O-induced corrosion on the Zn anode surface.Benefiting from the desired functional groups,when only trace amounts of Tween-20(0.050 g·L-1)were used,the Zn anode displayed good cycling stability over 2170 h at 10 mA·cm-2 and a high average Coulombic efficiency of 98.94％over 1000 cycles.The Tween-20 polymer can also be effectively employed in MnO2/Zn full batteries.Con-sidering their toxicity,price and amount of usage,these surfactant additives provide a promising strategy for real-izing the stability and reversibility of high-performance Zn anodes.
基金项目
National Natural Science Foundation of China(22102157)
National Natural Science Foundation of China(U1910208)
Natural Science Foundation of Shanxi Province of China(20210302124097)
Natural Science Foundation of Shanxi Province of China(20210302124663)
Opening Foundation of Shanxi Provincial Key Laboratory for High Performance Battery Materials and Devices(2022HPBMD02002)
Graduate Student Innovation Program of North University of China(20221871)
Natural Science Foundation of Hubei Province of China(2022CFB577)
维普
万方数据