Aqueous Zn-ion batteries(AZIBs)deliver outstanding potential as next-generation energy storage systems due to the attractive merits of inherent safety and low cost.However,uncurbed dendrite growth and non-negligible w...Aqueous Zn-ion batteries(AZIBs)deliver outstanding potential as next-generation energy storage systems due to the attractive merits of inherent safety and low cost.However,uncurbed dendrite growth and non-negligible water-induced side reactions can be fatal to the stability of Zn anodes and the commercial development of AZIBs.Herein,we construct a bifunctional zincophilic-hydrophobic interfacial layer(STA-ZnO layer)for attaining a stable Zn anode.Exposed hydrophobic alkyl chains can repel H_(2)O to prevent it reaching the Zn foil surface,effectively alleviating the HER and corrosion side reactions.Meanwhile,the zincophilic ZnO ensures that the STA-ZnO@Zn anode accelerates Zn^(2+)deposition and constrains the growth of Zn dendrites.Benefitting from these advantages,symmetric cells based on the STA-ZnO@Zn anode can deliver long-term cycling stability over 4900 h and 4000 h at 1 mA cm^(-2) and 5 mA cm^(-2) for 1 mAh cm^(-2),respectively.Encouragingly,the STA-ZnO@Zn anode also exhibits a high average CE of 99.81%(2000 cycles).This work develops a feasible strategy to protect Zn anodes for achieving the practical application of AZIBs.展开更多
基金supported by Research Contract for High Performance Aqueous Zinc Ion Battery Technology[grant numbers A342-JS-2024-0007]the Opening Project of thenState Key Laboratory of Special Chemical Power Sources[grant numbers SKL-ACPS-C-03]the Natural Science Foundation of Chongqing(CSTB2023NSCQ-MSX0617)。
文摘Aqueous Zn-ion batteries(AZIBs)deliver outstanding potential as next-generation energy storage systems due to the attractive merits of inherent safety and low cost.However,uncurbed dendrite growth and non-negligible water-induced side reactions can be fatal to the stability of Zn anodes and the commercial development of AZIBs.Herein,we construct a bifunctional zincophilic-hydrophobic interfacial layer(STA-ZnO layer)for attaining a stable Zn anode.Exposed hydrophobic alkyl chains can repel H_(2)O to prevent it reaching the Zn foil surface,effectively alleviating the HER and corrosion side reactions.Meanwhile,the zincophilic ZnO ensures that the STA-ZnO@Zn anode accelerates Zn^(2+)deposition and constrains the growth of Zn dendrites.Benefitting from these advantages,symmetric cells based on the STA-ZnO@Zn anode can deliver long-term cycling stability over 4900 h and 4000 h at 1 mA cm^(-2) and 5 mA cm^(-2) for 1 mAh cm^(-2),respectively.Encouragingly,the STA-ZnO@Zn anode also exhibits a high average CE of 99.81%(2000 cycles).This work develops a feasible strategy to protect Zn anodes for achieving the practical application of AZIBs.
