NiFe-LDH has been recognized as the most effcient and cost-effective material for wider applications in electrocatalytic,photoelectrocatalytic,and photocatalytic water splitting,with supercapacitors and adsor bents,ow...NiFe-LDH has been recognized as the most effcient and cost-effective material for wider applications in electrocatalytic,photoelectrocatalytic,and photocatalytic water splitting,with supercapacitors and adsor bents,owing to their inimitable physicochemical properties.It is well known that standalone NiFe-LDH executes poor electrical conductivity,sluggish mass transfer,and low activity,which put a question mark on their catalytic efficiency and other applications that require superior electrical conductivity and exciton pair separation effciency.Most importantly,this constraint creates a hindrance to their superior perform ance in the area of electrocatalytic and photochemical water splitting.To avoid these shortcomings,the coupled structure of NiFe-LDH/graphene has the potential to reflect properties of both NiFe-LDHs and conductive graphene,which completely overcome the shortcomings of counterparts,ensuring better performance and stability.This review aims to summarize the structural impact of NiFe-LDHs,with the interfacial role of graphene/graphene oxide(GO)by establishing a relationship between their structure and activity.Moreover,the emphasis has been laid on the latest development in NiFe-LDH/GO-based materials,along with attention to synthetic methods targeting the creation of a hierarchal porous nature in the materials with different growth approaches to NiFe-LDH on graphene for applications in electro catalytic,photoelectrocatalytic,and photocatalytic water splitting activities.The latest research and devel opment in thisfield using NiFe-LDH/graphene with a sensible intermixing of active sites and conductive framework is explored.展开更多
Transition metal selenides are regarded as promising alternatives for sodium-ion batteries(SIBs)owing to their high theoretical capacity based on the conversion reaction.However,the poor electrical conductivity,sluggi...Transition metal selenides are regarded as promising alternatives for sodium-ion batteries(SIBs)owing to their high theoretical capacity based on the conversion reaction.However,the poor electrical conductivity,sluggish reaction kinetics,and drastic volume change during cycling severely restrict their practical applications.展开更多
Sodium/potassium ion batteries(SIBs/PIBs)are attractive energy storage devices that offer greater sustainability and economic efficiency compared to their lithium-ion battery(LIB)counterparts.However,conventional elec...Sodium/potassium ion batteries(SIBs/PIBs)are attractive energy storage devices that offer greater sustainability and economic efficiency compared to their lithium-ion battery(LIB)counterparts.However,conventional electrode materials with satisfactory cycling stability and rate capacity are still lacking,due to intrinsic low electronic conductivity,sluggish intrinsic ion/electron kinetics and unsatisfactory structural stability.Herein,a well-designed two-step electrospinning/annealing strategy has been employed to fabricate defect-rich WS_(x)Se_(2-x)nanocrystals within selenized polyacrylonitrile fibers(designated as WSSe-Se@PAN).By tuning the Se-doping into the PAN fibers and forming defect-rich WS_(x)Se_(2-x)nanocrystals,the synergistic coupling of S-vacancy regulation can enhance the active sites,expand the interlayer spacing,and accelerate Na^(+)/K^(+)diffusion kinetics,simultaneously.The WSSe-Se@PAN electrode,serving as the anode,delivers a superior sodium storage performance(467 mA h g^(-1)at 2.0 A g^(-1)after 700 cycles),and shows a reversible discharge capacity of 299 mA h g^(-1)at 0.5 A g^(-1)after 60 cycles with 99.8%capacity retention for the sodium ion full batteries.Encouragingly,it displays excellent feasibility in a wide working temperature range between-15 and 50℃ for SIBs.Furthermore,it exhibits high-rate capability and robust cycling life(139 mA h g^(-1)at 1.0 A g^(-1)after 1000 cycles)for PIBs.This work demonstrates that defect engineering of metal chalcogenides by anion doping is a feasible strategy to achieve high-performance anode materials for alkali metal ion batteries.展开更多
文摘NiFe-LDH has been recognized as the most effcient and cost-effective material for wider applications in electrocatalytic,photoelectrocatalytic,and photocatalytic water splitting,with supercapacitors and adsor bents,owing to their inimitable physicochemical properties.It is well known that standalone NiFe-LDH executes poor electrical conductivity,sluggish mass transfer,and low activity,which put a question mark on their catalytic efficiency and other applications that require superior electrical conductivity and exciton pair separation effciency.Most importantly,this constraint creates a hindrance to their superior perform ance in the area of electrocatalytic and photochemical water splitting.To avoid these shortcomings,the coupled structure of NiFe-LDH/graphene has the potential to reflect properties of both NiFe-LDHs and conductive graphene,which completely overcome the shortcomings of counterparts,ensuring better performance and stability.This review aims to summarize the structural impact of NiFe-LDHs,with the interfacial role of graphene/graphene oxide(GO)by establishing a relationship between their structure and activity.Moreover,the emphasis has been laid on the latest development in NiFe-LDH/GO-based materials,along with attention to synthetic methods targeting the creation of a hierarchal porous nature in the materials with different growth approaches to NiFe-LDH on graphene for applications in electro catalytic,photoelectrocatalytic,and photocatalytic water splitting activities.The latest research and devel opment in thisfield using NiFe-LDH/graphene with a sensible intermixing of active sites and conductive framework is explored.
基金supported by the Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China(2021ZR140,2021ZR117)National Natural Science Foundation of China(Project No.22225902 and 22209185)+6 种基金the National key Research&Development Program of China(SQ2021YFE012234,2021YFA1501500)the CAS-Commonwealth Scientific and Industrial Research Organization(CSIRO)Joint Research Projects(121835KYSB20200039)the Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(Grant.YLU-DNL Fund 2021011)Fujian Province Central Government Guides Tocal Science and Technology Development Special Project(No.2022L3024)Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(2021ZR117)China Postdoctoral Science Foundation(Grant No.2021TQ0331 and 2021M700147)Natural Science Foundation of Fujian Province,China(No.2021J02020).
文摘Transition metal selenides are regarded as promising alternatives for sodium-ion batteries(SIBs)owing to their high theoretical capacity based on the conversion reaction.However,the poor electrical conductivity,sluggish reaction kinetics,and drastic volume change during cycling severely restrict their practical applications.
基金supported by the National Key Research and Development Program of China(2023YFC3906300 and 2019YFC1904500)National Natural Science Foundation of China(NSFC 51502036 and 21875037)+3 种基金the Young Top Talent of Fujian Young Eagle Program of Fujian Province,Educational Commission of Fujian Province(2022G02022)Key Project for Technology Innovation and Industrialization of Fujian Province(2023G002)Natural Science Foundation of Fuzhou City(2022-Y-004)Natural Science Foundation of Fujian Province(2023J02013 and 2023YZ038001).
文摘Sodium/potassium ion batteries(SIBs/PIBs)are attractive energy storage devices that offer greater sustainability and economic efficiency compared to their lithium-ion battery(LIB)counterparts.However,conventional electrode materials with satisfactory cycling stability and rate capacity are still lacking,due to intrinsic low electronic conductivity,sluggish intrinsic ion/electron kinetics and unsatisfactory structural stability.Herein,a well-designed two-step electrospinning/annealing strategy has been employed to fabricate defect-rich WS_(x)Se_(2-x)nanocrystals within selenized polyacrylonitrile fibers(designated as WSSe-Se@PAN).By tuning the Se-doping into the PAN fibers and forming defect-rich WS_(x)Se_(2-x)nanocrystals,the synergistic coupling of S-vacancy regulation can enhance the active sites,expand the interlayer spacing,and accelerate Na^(+)/K^(+)diffusion kinetics,simultaneously.The WSSe-Se@PAN electrode,serving as the anode,delivers a superior sodium storage performance(467 mA h g^(-1)at 2.0 A g^(-1)after 700 cycles),and shows a reversible discharge capacity of 299 mA h g^(-1)at 0.5 A g^(-1)after 60 cycles with 99.8%capacity retention for the sodium ion full batteries.Encouragingly,it displays excellent feasibility in a wide working temperature range between-15 and 50℃ for SIBs.Furthermore,it exhibits high-rate capability and robust cycling life(139 mA h g^(-1)at 1.0 A g^(-1)after 1000 cycles)for PIBs.This work demonstrates that defect engineering of metal chalcogenides by anion doping is a feasible strategy to achieve high-performance anode materials for alkali metal ion batteries.
