Rechargeable aqueous Zn-ion batteries(ZIBs)have emerged as a promising new energy storage technology,characterized by their low cost,high safety,environmental friendliness,and the abundant availability of Zn resources...Rechargeable aqueous Zn-ion batteries(ZIBs)have emerged as a promising new energy storage technology,characterized by their low cost,high safety,environmental friendliness,and the abundant availability of Zn resources.However,several challenges remain with their use,such as zinc dendrite formation,corrosion,passivation,and hydrogen evolution reaction(HER)on the zinc anodesurface,leading to a short overall battery life.In this paper,a zinc anode-coating method with silica-fly ash composite(FAS)has been developed.This modified Zn anode(5FAS@Zn)demonstrates remarkable improvements in the performance and stability of ZIBs by effectively decreasing zinc nucleation overpotential and minimizing charge transfer resistance while facilitating stable Zn plating and stripping as well as achieving even zinc deposition.The remarkable cycling lifespan of the 5FAS@Znll5FAS@Zn symmetrical cell is 1800 h at 0.5 mA cm^(-2)and 1500 h at1 mA cm^(-2).The 5FAS@ZnllCu half-cell outperforms pure Zn batteries with a high and consistent Coulombic efficiency(CE)of 99.8%over 800 cycles at 1 mA cm^(-2).Furthermore,the full cell of 5FAS@ZnllV_(2)O_(5)exhibits notable improvements in cycling performance.This research provides a scalable and sustainable method to extend the life of zinc anodes and has significant implications for the large-scale deployment of zinc-ion batteries.展开更多
基金financially supported by the Thailand Science Research and Innovation Fund Chulalongkorn Universitythe National Research Council of Thailand(No.N11A670659)the National Natural Science Foundation of China(Nos.52125405 and U22A20108)
文摘Rechargeable aqueous Zn-ion batteries(ZIBs)have emerged as a promising new energy storage technology,characterized by their low cost,high safety,environmental friendliness,and the abundant availability of Zn resources.However,several challenges remain with their use,such as zinc dendrite formation,corrosion,passivation,and hydrogen evolution reaction(HER)on the zinc anodesurface,leading to a short overall battery life.In this paper,a zinc anode-coating method with silica-fly ash composite(FAS)has been developed.This modified Zn anode(5FAS@Zn)demonstrates remarkable improvements in the performance and stability of ZIBs by effectively decreasing zinc nucleation overpotential and minimizing charge transfer resistance while facilitating stable Zn plating and stripping as well as achieving even zinc deposition.The remarkable cycling lifespan of the 5FAS@Znll5FAS@Zn symmetrical cell is 1800 h at 0.5 mA cm^(-2)and 1500 h at1 mA cm^(-2).The 5FAS@ZnllCu half-cell outperforms pure Zn batteries with a high and consistent Coulombic efficiency(CE)of 99.8%over 800 cycles at 1 mA cm^(-2).Furthermore,the full cell of 5FAS@ZnllV_(2)O_(5)exhibits notable improvements in cycling performance.This research provides a scalable and sustainable method to extend the life of zinc anodes and has significant implications for the large-scale deployment of zinc-ion batteries.
