Zinc metal is regarded as one of the most promising anodes for Zn-based batteries in next-generation energy storage systems.However,the dendrite growth and interfacial corrosion lead to poor reversibility and cycle li...Zinc metal is regarded as one of the most promising anodes for Zn-based batteries in next-generation energy storage systems.However,the dendrite growth and interfacial corrosion lead to poor reversibility and cycle life of Zn anodes.Herein,we synthesize a 2-phosphate-1,2,4-butane tricarboxylic acid modified hyperbranched polyamidoamine containing rich terminal groups of phosphate and carboxyl(HPC)as modified layer for the Zn anodes.Importantly,the in situ acid-etching promotes the exposure of(002)Zn plane and the generated salt-polymer complexes could be adhered to the Zn anodes tightly.This greatly favors the uniform deposition of Zn and inhibits interfacial corrosion.Consequently,stable HPC@Zn anode plating/stripping for over 1200 h at a high areal capacity of 4 mAh/cm^(2)and a current density of 4 m A/cm^(2)is obtained.This study provides a new avenue of hyperbranched polymer in interfacial design for highly reversible and stable Zn metal anodes.展开更多
Electromagnetic interference(EMI)is becoming commonplace with the development of modern electronics.In this work,a series of conductive polymer composite fabrics that have high EMI shielding effectiveness(SE),high mec...Electromagnetic interference(EMI)is becoming commonplace with the development of modern electronics.In this work,a series of conductive polymer composite fabrics that have high EMI shielding effectiveness(SE),high mechanical strength,and resilience to adverse conditions were prepared.Crosslinked hyperbranched polyamidoamine(referred to as xHP-Qy)was used to create a conductive Ag layer tightly bound to the underlying matrix of poly(meta-phenylene isophthalamide)(PMIA).The morphology and physicochemical properties of the starting materials,intermediates,and the final PMIA/xHPQy/Ag fabrics were characterized extensively.The PMIA matrix and the Ag layer were connected by the xHP-Qy that had a distinct antenna-shaped structure.The lowest resistivity and highest EMI SE of the fabrics were 2.37×10^(−3)Ω·cm and 107.66 dB,respectively.It was further verified by finite element simulation that the PMIA/xHP-Qy/Ag had an exceptional EMI shielding performance.The fabrics maintained their superior performance despite harsh environments(high/low temperature,high humidity,strong acid/alkali,solvents,salt spray corrosion)or mechanical deformations(bending-stretching,winding-releasing,abrading).The developed strategy thus created access to resilient functional materials suitable for use in highly demanding scenarios.展开更多
基金financially supported by the National Natural Science Foundation of China(No.22209134)the Southwest Minzu University Research Startup Funds(No.RQD2021097)。
文摘Zinc metal is regarded as one of the most promising anodes for Zn-based batteries in next-generation energy storage systems.However,the dendrite growth and interfacial corrosion lead to poor reversibility and cycle life of Zn anodes.Herein,we synthesize a 2-phosphate-1,2,4-butane tricarboxylic acid modified hyperbranched polyamidoamine containing rich terminal groups of phosphate and carboxyl(HPC)as modified layer for the Zn anodes.Importantly,the in situ acid-etching promotes the exposure of(002)Zn plane and the generated salt-polymer complexes could be adhered to the Zn anodes tightly.This greatly favors the uniform deposition of Zn and inhibits interfacial corrosion.Consequently,stable HPC@Zn anode plating/stripping for over 1200 h at a high areal capacity of 4 mAh/cm^(2)and a current density of 4 m A/cm^(2)is obtained.This study provides a new avenue of hyperbranched polymer in interfacial design for highly reversible and stable Zn metal anodes.
基金financially by the National Natural Science Foundation of China(52073135,51673089,51903114)the Natural Science Foundation of Shandong Province(ZR2020ME066)the Yantai City Major Science and Technology Innovation Project(2024ZDCX016).
文摘Electromagnetic interference(EMI)is becoming commonplace with the development of modern electronics.In this work,a series of conductive polymer composite fabrics that have high EMI shielding effectiveness(SE),high mechanical strength,and resilience to adverse conditions were prepared.Crosslinked hyperbranched polyamidoamine(referred to as xHP-Qy)was used to create a conductive Ag layer tightly bound to the underlying matrix of poly(meta-phenylene isophthalamide)(PMIA).The morphology and physicochemical properties of the starting materials,intermediates,and the final PMIA/xHPQy/Ag fabrics were characterized extensively.The PMIA matrix and the Ag layer were connected by the xHP-Qy that had a distinct antenna-shaped structure.The lowest resistivity and highest EMI SE of the fabrics were 2.37×10^(−3)Ω·cm and 107.66 dB,respectively.It was further verified by finite element simulation that the PMIA/xHP-Qy/Ag had an exceptional EMI shielding performance.The fabrics maintained their superior performance despite harsh environments(high/low temperature,high humidity,strong acid/alkali,solvents,salt spray corrosion)or mechanical deformations(bending-stretching,winding-releasing,abrading).The developed strategy thus created access to resilient functional materials suitable for use in highly demanding scenarios.
