The unstable zinc(Zn)interface derived from undesired dendrite growth and parasitic reactions hinders the practical application of rechargeable zinc-ion batteries.Herein,we introduce 1-(2-pyridylazo)-2-naphthol(PAN)as...The unstable zinc(Zn)interface derived from undesired dendrite growth and parasitic reactions hinders the practical application of rechargeable zinc-ion batteries.Herein,we introduce 1-(2-pyridylazo)-2-naphthol(PAN)as a parts-per-million(ppm)level electrolyte additive to enhance the interfacial stability of Zn anode.Theoretical and experimental results demonstrate that PAN can parallel adsorb on the Zn surface and form strongπ-πinteractions between PAN molecules,helping to repel water molecules highly efficiently.Moreover,PAN featuring OH,pyridine N and azo N groups can chelate with Zn^(2+)and optimize the diffusion behavior of Zn^(2+),inducing even Zn deposition and suppressing dendrite growth.Remarkably,10 ppm(0.04 mM)PAN additive contributes to a long lifespan of 1500 h in a symmetrical cell at 2 mA cm^(−2) and 1 mAh cm^(−2).Also,the cycle stability of Zn∥NH_(4)V_(4)O_(10) and Zn∥MnO_(2) full cells showcases obvious enhancement.The Zn∥NH_(4)V_(4)O_(10) pouch cell exhibits impressive capacity retention of 71.1%after 250 cycles at a rate of 0.8 A g^(−1).This work provides a promising pathway for selecting high-efficient additives applied in aqueous metal-based batteries.展开更多
基金supported by the National Natural Science Foundation of China(22479043)the Major Program of the Natural Science Foundation of Hunan Province(2021JC0006,2025JJ30005)the Jiangxi Provincial Natural Science Foundation(20242BAB20120)。
文摘The unstable zinc(Zn)interface derived from undesired dendrite growth and parasitic reactions hinders the practical application of rechargeable zinc-ion batteries.Herein,we introduce 1-(2-pyridylazo)-2-naphthol(PAN)as a parts-per-million(ppm)level electrolyte additive to enhance the interfacial stability of Zn anode.Theoretical and experimental results demonstrate that PAN can parallel adsorb on the Zn surface and form strongπ-πinteractions between PAN molecules,helping to repel water molecules highly efficiently.Moreover,PAN featuring OH,pyridine N and azo N groups can chelate with Zn^(2+)and optimize the diffusion behavior of Zn^(2+),inducing even Zn deposition and suppressing dendrite growth.Remarkably,10 ppm(0.04 mM)PAN additive contributes to a long lifespan of 1500 h in a symmetrical cell at 2 mA cm^(−2) and 1 mAh cm^(−2).Also,the cycle stability of Zn∥NH_(4)V_(4)O_(10) and Zn∥MnO_(2) full cells showcases obvious enhancement.The Zn∥NH_(4)V_(4)O_(10) pouch cell exhibits impressive capacity retention of 71.1%after 250 cycles at a rate of 0.8 A g^(−1).This work provides a promising pathway for selecting high-efficient additives applied in aqueous metal-based batteries.
