Metallic zinc(Zn)has been considered as an ideal anode material for aqueous batteries,but its development is hampered by the growth of Zn dendrites and side reactions with aqueous electrolytes.Herein,a multifunctional...Metallic zinc(Zn)has been considered as an ideal anode material for aqueous batteries,but its development is hampered by the growth of Zn dendrites and side reactions with aqueous electrolytes.Herein,a multifunctional protective layer attached to Zn metal was fabricated by uniformly dispersing 2D Ti_(3)O_(7)^(2-)nanosheets in polyacrylonitrile(PAN)(denoted as PTO@Zn)to alleviate the above problems.展开更多
Solid-state potassium metal batteries have increasingly gained attention as promising alternatives in largescale energy storage due to their safety and low cost.However,these batteries usually suffer from a lack of su...Solid-state potassium metal batteries have increasingly gained attention as promising alternatives in largescale energy storage due to their safety and low cost.However,these batteries usually suffer from a lack of suitable K^(+)conducting solid electrolytes.Herein,a new KB_(11)H_(14)·2Me_(3)NBH_(3) complex electrolyte with high ionic conductivity and relative stability against K metal is reported.The crystal structure was solved as a monoclinic P2_(1)/c lattice.Density functional theory(DFT)calculations confirm significantly enhanced K-ion diffusion in the structure.High K-ion conductivities of 2.63×10^(-6) S cm^(-1) at 25℃ and 3.25×10^(-4) S cm^(-1) at 75℃ are achieved,putting it among the leading K^(+)solid conductors.Moreover,it shows favorable interfacial stability against the K metal anode precoated with NH_(3)B_(3)H_(7).Batteries coupling the TiS_(2) cathode deliver long-term cycling stability.This work provides a new group of K-ion solid-state electrolytes for safe potassium metal batteries.展开更多
基金supported by the National Natural Science Foundation of China(No.52271117)the Educational Commission of Hunan Province of China(No.23A0107)the High Technology Research and Development Program of Hunan Province of China(No.2022GK4038).
文摘Metallic zinc(Zn)has been considered as an ideal anode material for aqueous batteries,but its development is hampered by the growth of Zn dendrites and side reactions with aqueous electrolytes.Herein,a multifunctional protective layer attached to Zn metal was fabricated by uniformly dispersing 2D Ti_(3)O_(7)^(2-)nanosheets in polyacrylonitrile(PAN)(denoted as PTO@Zn)to alleviate the above problems.
基金supported by the National Natural Science Foundation of China(Grant No.U18042532,U23A2078,22171246,92261203,and 22273053)。
文摘Solid-state potassium metal batteries have increasingly gained attention as promising alternatives in largescale energy storage due to their safety and low cost.However,these batteries usually suffer from a lack of suitable K^(+)conducting solid electrolytes.Herein,a new KB_(11)H_(14)·2Me_(3)NBH_(3) complex electrolyte with high ionic conductivity and relative stability against K metal is reported.The crystal structure was solved as a monoclinic P2_(1)/c lattice.Density functional theory(DFT)calculations confirm significantly enhanced K-ion diffusion in the structure.High K-ion conductivities of 2.63×10^(-6) S cm^(-1) at 25℃ and 3.25×10^(-4) S cm^(-1) at 75℃ are achieved,putting it among the leading K^(+)solid conductors.Moreover,it shows favorable interfacial stability against the K metal anode precoated with NH_(3)B_(3)H_(7).Batteries coupling the TiS_(2) cathode deliver long-term cycling stability.This work provides a new group of K-ion solid-state electrolytes for safe potassium metal batteries.
