Aqueous zinc-ion batteries(ZIBs)has been regarded as a promising energy storage system for large-scale application due to the advantages of low cost and high safety.However,the growth of Zn dendrite,hydrogen evolution...Aqueous zinc-ion batteries(ZIBs)has been regarded as a promising energy storage system for large-scale application due to the advantages of low cost and high safety.However,the growth of Zn dendrite,hydrogen evolution and passivation issues induce the poor electrochemical performance of ZIBs.Herein,a Na_(3)Zr_(2)Si_(2)PO_(12)(NZSP)protection layer with high ionic conductivity of 2.94 m S/cm on Zn metal anode was fabricated by drop casting approach.The protection layer prevents Zn dendrites formation,hydrogen evolution as well as passivation,and facilitates a fast Zn~(2+)transport.As a result,the symmetric cells based on NZSP-coated Zn show a stable cycling over 1360 h at 0.5 m A/cm^(2)with 0.5 m Ah/cm^(2) and 1000 h even at a high current density of 5 m A/cm^(2) with 2 m Ah/cm^(2).Moreover,the full cells combined with V_(2)O_(5)-based cathode displays high capacities and high rate capability.This work offers a facile and effective approach to stabilizing Zn metal anode for enhanced ZIBs.展开更多
Flexible thermoelectric generators(f-TEGs)are of importance for self-powered,portable,and wearable electronics.The materials’thermoelectric(TE)performance is one of the factors that affect the conversion efficiency o...Flexible thermoelectric generators(f-TEGs)are of importance for self-powered,portable,and wearable electronics.The materials’thermoelectric(TE)performance is one of the factors that affect the conversion efficiency of f-TEGs.Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)as a kind of conducting polymers has low thermal conductivity and good processability in solution;however,its TE properties are still much lower than those of the inorganic TE materials,which limits its wide applications in f-TEGs.Two-dimensional(2D)inorganic nanosheets(NSs)exfoliated from their corresponding powders are promising filler materials for enhancing the TE properties of PEDOT:PSS.This paper provides a brief review on the research progress of flexible 2D inorganic NS/PEDOT:PSS composite films fabricated by vacuum filtration,drop casting,and spin coating.The challenges,perspectives,and outlooks of flexible 2D inorganic NS/PEDOT:PSS composite films are further discussed.展开更多
基金supported by Feitian Scholar Program of Gansu Province and Youth Doctoral Fund of Education Department of Gansu Province(No.2021QB-115)Innovation Fund of Education Department of Gansu Province(No.2022A-138)。
文摘Aqueous zinc-ion batteries(ZIBs)has been regarded as a promising energy storage system for large-scale application due to the advantages of low cost and high safety.However,the growth of Zn dendrite,hydrogen evolution and passivation issues induce the poor electrochemical performance of ZIBs.Herein,a Na_(3)Zr_(2)Si_(2)PO_(12)(NZSP)protection layer with high ionic conductivity of 2.94 m S/cm on Zn metal anode was fabricated by drop casting approach.The protection layer prevents Zn dendrites formation,hydrogen evolution as well as passivation,and facilitates a fast Zn~(2+)transport.As a result,the symmetric cells based on NZSP-coated Zn show a stable cycling over 1360 h at 0.5 m A/cm^(2)with 0.5 m Ah/cm^(2) and 1000 h even at a high current density of 5 m A/cm^(2) with 2 m Ah/cm^(2).Moreover,the full cells combined with V_(2)O_(5)-based cathode displays high capacities and high rate capability.This work offers a facile and effective approach to stabilizing Zn metal anode for enhanced ZIBs.
基金supported by the Natural Science Foundation of Shanghai(23ZR1481100)Shuguang Program of Shanghai Education Development Foundation,and Shanghai Municipal Education Commission(22SG54)+2 种基金support from the Knut and Alice Wallenberg Foundation through the Wallenberg Academy Fellows program(grant no.KAW 2020.0196)the Swedish Research Council under project grant no 2021-03826the Swedish Energy Agency under project 46519-1.
文摘Flexible thermoelectric generators(f-TEGs)are of importance for self-powered,portable,and wearable electronics.The materials’thermoelectric(TE)performance is one of the factors that affect the conversion efficiency of f-TEGs.Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)as a kind of conducting polymers has low thermal conductivity and good processability in solution;however,its TE properties are still much lower than those of the inorganic TE materials,which limits its wide applications in f-TEGs.Two-dimensional(2D)inorganic nanosheets(NSs)exfoliated from their corresponding powders are promising filler materials for enhancing the TE properties of PEDOT:PSS.This paper provides a brief review on the research progress of flexible 2D inorganic NS/PEDOT:PSS composite films fabricated by vacuum filtration,drop casting,and spin coating.The challenges,perspectives,and outlooks of flexible 2D inorganic NS/PEDOT:PSS composite films are further discussed.
