The practical applications of zinc metal batteries are plagued by the dendritic propagation of its metal anodes due to the limited transfer rate of charge and mass at the electrode/electrolyte interphase.To enhance th...The practical applications of zinc metal batteries are plagued by the dendritic propagation of its metal anodes due to the limited transfer rate of charge and mass at the electrode/electrolyte interphase.To enhance the reversibility of Zn metal,a quasi-solid interphase composed by defective metal-organic framework(MOF)nanoparticles(D-UiO-66)and two kinds of zinc salts electrolytes is fabricated on the Zn surface served as a zinc ions reservoir.Particularly,anions in the aqueous electrolytes could be spontaneously anchored onto the Lewis acidic sites in defective MOF channels.With the synergistic effect between the MOF channels and the anchored anions,Zn^(2+)transport is prompted significantly.Simultaneously,such quasi-solid interphase boost charge and mass transfer of Zn^(2+),leading to a high zinc transference number,good ionic conductivity,and high Zn^(2+)concentration near the anode,which mitigates Zn dendrite growth obviously.Encouragingly,unprecedented average coulombic efficiency of 99.8%is achieved in the Zn||Cu cell with the proposed quasi-solid interphase.The cycling performance of D-UiO-66@Zn||MnO_(2)(~92.9%capacity retention after 2000 cycles)and D-UiO-66@Zn||NH_(4)V_(4)O_(10)(~84.0%capacity retention after 800 cycles)prove the feasibility of the quasi-solid interphase.展开更多
All-solid-state lithium batteries(ASSLBs),utilizing sulfide solid electrolyte,are considered as the promising design on account of their superior safety and high energy density,whereas the time-consuming preparation p...All-solid-state lithium batteries(ASSLBs),utilizing sulfide solid electrolyte,are considered as the promising design on account of their superior safety and high energy density,whereas the time-consuming preparation process of sulfide electrolyte powders and the thickness of electrolyte layer hinder their practical application.Herein,an innovative ultimate-energy mechanical alloying plus rapid thermal processing approach is employed to rapidly synthesize the crystalline Argyrodite-type conductor Li_(5.3)PS_(4.3)ClBr_(0.7)(LPSCIBr)with superior ionic conductivity(11.7 mS cm^(-1)).Furthermore,to realize the higher energy density of the battery,an ultrathin LPSCIBr sulfide electrolyte membrane with superior ionic conductivity of 6.5 mS cm^(-1)is fabricated with the aid of polytetrafluoroethylene(PTFE)binder and the reinforced cellulose mesh.Moreover,a simple solid electrolyte interphase(SEI)is constructed on the surface of lithium metal to enhance anodic stability.Benefiting from the joint efforts of these merits,the modified ASSLBs with a high cell-level energy density of 311 Wh kg^(-1) show an excellent cyclic stability.The assembled all-solid-state Li_(2) S/Li pouch cell can operate even under the severe conditions of bending and cutting,demonstrating the enormous potential of the sulfide electrolyte membrane for ASSLBs application.展开更多
The storage of hydrogen in a compact,safe and cost-effective manner can be one of the key enabling technologies to power a more sustainable society.Magnesium hydride(MgH_(2))has attracted strong research interest as a...The storage of hydrogen in a compact,safe and cost-effective manner can be one of the key enabling technologies to power a more sustainable society.Magnesium hydride(MgH_(2))has attracted strong research interest as a hydrogen carrier because of its high gravimetric and volumetric hydrogen densities.However,the practical use of MgH_(2)for hydrogen storage has been limited due to high operation temperatures and sluggish kinetics.Catalysis is of crucial importance for the enhancement of hydrogen cycling kinetics of Mg/MgH_(2)and considerable work has been focused on designing,fabricating and optimizing catalysts.This review covers the recent advances in catalyzed Mg-based hydrogen storage materials.The fundamental properties and the syntheses of MgH_(2)as a hydrogen carrier are first briefly reviewed.After that,the general catalysis mechanisms and the catalysts developed for hydrogen storage in MgH_(2)are summarized in detail.Finally,the challenges and future research focus are discussed.Literature studies indicate that transition metals,rare-earth metals and their compounds are quite effective in catalyzing hydrogen storage in Mg/MgH_(2).Most metal-containing compounds were converted in situ to elemental metal or their magnesium alloys,and their particle sizes and dispersion affect their catalytic activity.The in-situ construction of catalyzed ultrasmall Mg/MgH_(2)nanostructures(<10 nm in size)is believed to be the future research focus.These important insights will help with the design and development of high-performance catalysts for hydrogen storage in Mg/MgH_(2).展开更多
A hydrophobic epoxy resin coating with an environmental-friendly deep eutectic solvent(DES)-based conversion pretreatment was proposed to enhance the corrosion resistance of magnesium alloys.The hydrophobic epoxy resi...A hydrophobic epoxy resin coating with an environmental-friendly deep eutectic solvent(DES)-based conversion pretreatment was proposed to enhance the corrosion resistance of magnesium alloys.The hydrophobic epoxy resin coatings on the AZ31B magnesium alloy with and without the DES-based conversion pretreatment were thoroughly compared.It is found that the DES-based conversion film on the AZ31B magnesium alloy is mainly composed of MgH2,MgO and MgCO3.Furthermore,the conversion film possesses porous structure,which provides more anchor points for the following epoxy resin coating.However,without the DES-conversion pretreatment,the epoxy resin is difficult to be attached on the substrate during the dip-coating process.The double layered hybrid coating system promotes the corrosion resistance of the magnesium alloys significantly,which can be ascribed to the unique architecture and component including the hydrophobicity of the surface layer,the dense and interlocked epoxy resin,and the corrosion resistant DES-based conversion pretreatment.展开更多
Electrochromism refers to the persistent and reversible change of optical properties by an applied voltage pulse.Electrochromic(EC)devices have been extensively studied because of their commercial applications in smar...Electrochromism refers to the persistent and reversible change of optical properties by an applied voltage pulse.Electrochromic(EC)devices have been extensively studied because of their commercial applications in smart windows of green buildings,display devices and thermal control of equipments.In this review,a basic EC device design is presented based on useful oxides and solid-state electrolytes.We focus on the state-of-the-art research activities related to the structures of tungsten oxide(WO_3)and nickel oxide(NiO),summarizing the strategies to improve their EC performances and further applications of devices.展开更多
Amorphous carbon is considered as a prospective and serviceable anode for the storage of sodium.In this contribution,we illuminate the transformation rule of defect/void ratio and the restrictive relation between spec...Amorphous carbon is considered as a prospective and serviceable anode for the storage of sodium.In this contribution,we illuminate the transformation rule of defect/void ratio and the restrictive relation between specifc capacity and rate capability.Inspired by this mechanism,ratio of plateau/slope capacity is regulated via temperature-control pyrolysis.Moreover,pore-forming reaction is induced to create defects,open up the isolated voids,and build fast ion channels to further enhance the capacity and rate ability.Numerous fast ion channels,high ion-electron conductivity,and abundant defects lead the designed porous hard carbon/Co_(3)O_(4) anode to realize a high specifc capacity,prolonged circulation ability,and enhanced capacity at high rates.Tis research deepens the comprehension of sodium storage behavior and proposes a fabrication approach to achieve high performance carbonaceous anodes for sodium-ion batteries.展开更多
基金supported by Zhejiang University K.P.Chao’s High Technology Development Foundation.
文摘The practical applications of zinc metal batteries are plagued by the dendritic propagation of its metal anodes due to the limited transfer rate of charge and mass at the electrode/electrolyte interphase.To enhance the reversibility of Zn metal,a quasi-solid interphase composed by defective metal-organic framework(MOF)nanoparticles(D-UiO-66)and two kinds of zinc salts electrolytes is fabricated on the Zn surface served as a zinc ions reservoir.Particularly,anions in the aqueous electrolytes could be spontaneously anchored onto the Lewis acidic sites in defective MOF channels.With the synergistic effect between the MOF channels and the anchored anions,Zn^(2+)transport is prompted significantly.Simultaneously,such quasi-solid interphase boost charge and mass transfer of Zn^(2+),leading to a high zinc transference number,good ionic conductivity,and high Zn^(2+)concentration near the anode,which mitigates Zn dendrite growth obviously.Encouragingly,unprecedented average coulombic efficiency of 99.8%is achieved in the Zn||Cu cell with the proposed quasi-solid interphase.The cycling performance of D-UiO-66@Zn||MnO_(2)(~92.9%capacity retention after 2000 cycles)and D-UiO-66@Zn||NH_(4)V_(4)O_(10)(~84.0%capacity retention after 800 cycles)prove the feasibility of the quasi-solid interphase.
基金supported by the National Natural Science Foundation of China(U20A20126,51971201)the Key Research and Development Program of Zhejiang Province(2021C01175)。
文摘All-solid-state lithium batteries(ASSLBs),utilizing sulfide solid electrolyte,are considered as the promising design on account of their superior safety and high energy density,whereas the time-consuming preparation process of sulfide electrolyte powders and the thickness of electrolyte layer hinder their practical application.Herein,an innovative ultimate-energy mechanical alloying plus rapid thermal processing approach is employed to rapidly synthesize the crystalline Argyrodite-type conductor Li_(5.3)PS_(4.3)ClBr_(0.7)(LPSCIBr)with superior ionic conductivity(11.7 mS cm^(-1)).Furthermore,to realize the higher energy density of the battery,an ultrathin LPSCIBr sulfide electrolyte membrane with superior ionic conductivity of 6.5 mS cm^(-1)is fabricated with the aid of polytetrafluoroethylene(PTFE)binder and the reinforced cellulose mesh.Moreover,a simple solid electrolyte interphase(SEI)is constructed on the surface of lithium metal to enhance anodic stability.Benefiting from the joint efforts of these merits,the modified ASSLBs with a high cell-level energy density of 311 Wh kg^(-1) show an excellent cyclic stability.The assembled all-solid-state Li_(2) S/Li pouch cell can operate even under the severe conditions of bending and cutting,demonstrating the enormous potential of the sulfide electrolyte membrane for ASSLBs application.
基金the financial support received from the National Key R&D Program of China(No.2022YFB3803700)the National Outstanding Youth Foundation of China(No.52125104)+3 种基金the Natural Science Foundation of Zhejiang Province(No.LD21E010002)the National Natural Science Foundation of China(Nos.52001277 and U22A20120)the Fundamental Research Funds for the Central Universities(Nos.2021FZZX001-09 and 226-2022-00246)the National Youth Top-Notch Talent Support Program.
文摘The storage of hydrogen in a compact,safe and cost-effective manner can be one of the key enabling technologies to power a more sustainable society.Magnesium hydride(MgH_(2))has attracted strong research interest as a hydrogen carrier because of its high gravimetric and volumetric hydrogen densities.However,the practical use of MgH_(2)for hydrogen storage has been limited due to high operation temperatures and sluggish kinetics.Catalysis is of crucial importance for the enhancement of hydrogen cycling kinetics of Mg/MgH_(2)and considerable work has been focused on designing,fabricating and optimizing catalysts.This review covers the recent advances in catalyzed Mg-based hydrogen storage materials.The fundamental properties and the syntheses of MgH_(2)as a hydrogen carrier are first briefly reviewed.After that,the general catalysis mechanisms and the catalysts developed for hydrogen storage in MgH_(2)are summarized in detail.Finally,the challenges and future research focus are discussed.Literature studies indicate that transition metals,rare-earth metals and their compounds are quite effective in catalyzing hydrogen storage in Mg/MgH_(2).Most metal-containing compounds were converted in situ to elemental metal or their magnesium alloys,and their particle sizes and dispersion affect their catalytic activity.The in-situ construction of catalyzed ultrasmall Mg/MgH_(2)nanostructures(<10 nm in size)is believed to be the future research focus.These important insights will help with the design and development of high-performance catalysts for hydrogen storage in Mg/MgH_(2).
基金supported financially by the Natural Science Foundation of Zhejiang Province(No.LY19B030008)the National Key Research and Development Program of China(No.2016YFF0204300).
文摘A hydrophobic epoxy resin coating with an environmental-friendly deep eutectic solvent(DES)-based conversion pretreatment was proposed to enhance the corrosion resistance of magnesium alloys.The hydrophobic epoxy resin coatings on the AZ31B magnesium alloy with and without the DES-based conversion pretreatment were thoroughly compared.It is found that the DES-based conversion film on the AZ31B magnesium alloy is mainly composed of MgH2,MgO and MgCO3.Furthermore,the conversion film possesses porous structure,which provides more anchor points for the following epoxy resin coating.However,without the DES-conversion pretreatment,the epoxy resin is difficult to be attached on the substrate during the dip-coating process.The double layered hybrid coating system promotes the corrosion resistance of the magnesium alloys significantly,which can be ascribed to the unique architecture and component including the hydrophobicity of the surface layer,the dense and interlocked epoxy resin,and the corrosion resistant DES-based conversion pretreatment.
基金Program for Innovative Research Team in University of Ministry of Education of China (IRT13037)
文摘Electrochromism refers to the persistent and reversible change of optical properties by an applied voltage pulse.Electrochromic(EC)devices have been extensively studied because of their commercial applications in smart windows of green buildings,display devices and thermal control of equipments.In this review,a basic EC device design is presented based on useful oxides and solid-state electrolytes.We focus on the state-of-the-art research activities related to the structures of tungsten oxide(WO_3)and nickel oxide(NiO),summarizing the strategies to improve their EC performances and further applications of devices.
基金This work is fnancially supported by the Ministry of Education’s“Program for Innovative Research Team in University”(IRT13037)Qianjiang Talents Plan D(QJD1602029)+2 种基金Fundamental Research Funds for the Central Universities(2018QNA4011)the Postdoctoral Science Foundation of Zhejiang Province(zj20180111)College Students Science and Technology Innovation Activity Plan of Zhejiang Province(2018R401251).
文摘Amorphous carbon is considered as a prospective and serviceable anode for the storage of sodium.In this contribution,we illuminate the transformation rule of defect/void ratio and the restrictive relation between specifc capacity and rate capability.Inspired by this mechanism,ratio of plateau/slope capacity is regulated via temperature-control pyrolysis.Moreover,pore-forming reaction is induced to create defects,open up the isolated voids,and build fast ion channels to further enhance the capacity and rate ability.Numerous fast ion channels,high ion-electron conductivity,and abundant defects lead the designed porous hard carbon/Co_(3)O_(4) anode to realize a high specifc capacity,prolonged circulation ability,and enhanced capacity at high rates.Tis research deepens the comprehension of sodium storage behavior and proposes a fabrication approach to achieve high performance carbonaceous anodes for sodium-ion batteries.
