To explore the potential utilization of Elaeagnus mollis,we conducted a comprehensive assessment of its phytochemical composition,antioxidant properties,cholinesterase inhibition,and anti-HepG2 cell proliferation acti...To explore the potential utilization of Elaeagnus mollis,we conducted a comprehensive assessment of its phytochemical composition,antioxidant properties,cholinesterase inhibition,and anti-HepG2 cell proliferation activity across different plant parts(branch wood,branch bark,and pericarp)using various solvents(water,methanol,ethanol,and n-hexane).Our findings revealed that water extracts displayed superior antioxidant activities in ABTS and RP assays,while methanol extracts exhibited better performance in DPPH and FRAP assays.Moreover,methanol extracts demonstrated the highest effectiveness against anti-HepG2 cell proliferation,whereas n-hexane extracts showed greater efficiency in cholinesterase inhibition.Notably,branch bark extracts exhibited the highest levels of phytochemical compounds,with both branch bark and pericarp extracts demonstrating significant effects in cholinesterase inhibition and anti-HepG2 cell proliferation.Correlation analysis indicated that phytochemical compounds were primarily responsible for the observed biological activities.Overall,extracts from the branch bark and pericarp of E.mollis showed promising potential for antioxidant and anticancer activities,suggesting their suitability for applications in the pharmaceutical industry as health-promoting products.展开更多
CO_(2) hydrogenation to methanol is a critical technology for hydrogen energy conversion and a promising approach to mitigate the energy crisis and greenhouse effect.However,developing highly selective catalysts remai...CO_(2) hydrogenation to methanol is a critical technology for hydrogen energy conversion and a promising approach to mitigate the energy crisis and greenhouse effect.However,developing highly selective catalysts remains a major challenge for its practical application.Herein,we synthesize an efficient CoCuInO-r catalyst with Cu_(11)In_(9) and Co^(0) dual sites on In_(2)O_(3) via a sol-gel method.The Cu_(11)In_(9) intermetallic compound enhances H_(2) adsorption capacity and strength,and increases oxygen vacancy concentration on the catalyst surface,thereby improving CO_(2) activation and hydrogenation efficiency.Meanwhile,Co^(0) suppresses the desorption of the*CO species,facilitating its further hydrogenation to methanol.In-situ DRIFTS experiments indicate that the CO_(2) hydrogenation to methanol over CoCuInO-r follows the formate pathway.Compared with CuInO-r(containing Cu_(11)In_(9) on In_(2)O_(3)),CoCuInO-r exhibits a~20%increase in methanol selectivity and a 2-fold higher methanol space-time yield,reaching 7.68 mmol·g^(-1)·h^(-1) at 300℃ and 4 MPa.展开更多
N-(2-Ethynylphenyl)acrylamides have emerged as key intermediates for the synthesis of complex heteropolycyclic compounds.The recent advances focus on the tandem cyclization involving these precursors,among which forma...N-(2-Ethynylphenyl)acrylamides have emerged as key intermediates for the synthesis of complex heteropolycyclic compounds.The recent advances focus on the tandem cyclization involving these precursors,among which formation of fused six/N-three,six/five(N,S,O),and six/six-membered rings are highlighted.Nitrogen,sulfur,and oxygen incorporations into five-membered rings provide efficient routes to bioactive polycyclic molecules.These cyclization reactions exhibit excellent atom economy,high efficiency,and good functional group compatibility.Furthermore,novel catalytic systems and photochemical strategies also expand the synthetic applications of these precursors.Taken together,these advancements offer versatile tools for the synthesis of intricate heterocyclic scaffolds with broad applications in organic and medicinal chemistry.展开更多
Decoupling electrical and thermal properties to enhance the figure of merit of thermoelectric materials underscores an in-depth understanding of the mechanisms that govern the transfer of charge carriers.Typically,a f...Decoupling electrical and thermal properties to enhance the figure of merit of thermoelectric materials underscores an in-depth understanding of the mechanisms that govern the transfer of charge carriers.Typically,a factor that contributes to the optimization of thermal conductivity is often found to be detrimental to the electrical transport properties.Here,we systematically investigated 26 dimeric MX_(2)-type compounds(where M represents a metal and X represents a nonmetal element)to explore the influence of the electronic configurations of metal cations on lattice thermal transport and thermoelectric performance using first-principles calculations.A principled scheme has been identified that the filled outer orbitals of the cation lead to a significantly lower lattice thermal conductivity compared to that of the partly occupied case for MX_(2),due to the much weakened bonds manifested by the shallow potential well,smaller interatomic force constants,and higher atomic displacement parameters.Based on these findings,we propose two ionic compounds,BaAs and BaSe_(2),to realize reasonable high electrical conductivities through the structural anisotropy caused by the inserted covalent X_(2) dimers while still maintaining the large lattice anharmonicity.The combined superior electrical and thermal properties of BaSe_(2) lead to a high n-type thermoelectric ZT value of 2.3 at 500 K.This work clarifies the structural origin of the heat transport properties of dimeric MX_(2)-type compounds and provides an insightful strategy for developing promising thermoelectric materials.展开更多
As an extreme physical condition,high pressure serves as a potent means to substantially modify the interatomic distances and bonding patterns within condensed matter,thereby enabling the macroscopic manipulation of m...As an extreme physical condition,high pressure serves as a potent means to substantially modify the interatomic distances and bonding patterns within condensed matter,thereby enabling the macroscopic manipulation of material properties.We employed the CALYPSO method to predict the stable structures of RbB_(2)C_(4)across the pressure range from 0 GPa to 100 GPa and investigated its physical properties through first-principles calculations.Specially,we found four novel structures,namely,P6_(3)/mcm-,Amm2-,P1-,and I4/mmm-RbB_(2)C_(4).Under pressure conditions,electronic structure calculations reveal that all of them exhibit metallic characteristics.The calculation results of formation enthalpy show that the P6_(3)/mcm structure can be synthesized within the pressure range of 0–40 GPa.Specially,the Amm2,P1,and I4/mmm structures can be synthesized above 4 GPa,6 GPa,10 GPa,respectively.Moreover,the estimated Vickers hardness value of I4/mmm-RbB_(2)C_(4)compound is 47 GPa,suggesting that it is a superhard material.Interestingly,this study uncovers the continuous transformation of the crystal structure of RbB_(2)C_(4)from a layered configuration to folded and tubular forms,ultimately attaining a stabilized cage-like structure under the pressure span of 0–100 GPa.The application of pressure offers a formidable impetus for the advancement and innovation in condensed matter physics,facilitating the exploration of novel states and functions of matter.展开更多
The rare earth(RE)-transition metal(TM)based compounds have emerged as one of the best candi-dates for the application in eco-friendly and effective cooling technology due to their outstanding cryogenic magnetocaloric...The rare earth(RE)-transition metal(TM)based compounds have emerged as one of the best candi-dates for the application in eco-friendly and effective cooling technology due to their outstanding cryogenic magnetocaloric performances.In this work,three RE-TM germanides RE_(3)Co_(2)Ge_(4)(RE=Gd,Tb and Dy)were synthesized and characterized,aiming to investigating their structural,magnetic and magnetocaloric properties.These compounds crystallize in the Tb_(3)Co_(2)Ge_(4)-type monoclinic structure(space group C2/m,Z=2).Two successive ferromagnetic transitions are observed with T_(c) of 31 and 135 K for Gd_(3)Co_(2)Ge_(4),ferromagnetic and spin reorientation transitions are observed with Tc of 24 K and T_(s) of 19 K for Dy_(3)Co_(2)Ge_(4),all of which are second ordered.In contrast,Tb_(3)Co_(2)Ge_(4)exhibits a second order antiferromagnetic transition with T_(n) of 36 K,accompanied with a spin reorientation transition with T_(s) of 17 K.Furthermore,the ferromagnetic ground state for Gd_(3)Co_(2)Ge_(4)is also confirmed by the first-principles calculations.Significant cryogenic magnetocaloric performances are observed in these compounds,.The determined maximum magnetic entropy change(-ΔS_(M)^(max))under a magnetic field change(△H)of 0-7 T are 10.7,5.3 and 11.6 J/(kg·K)for Gd_(3)Co_(2)Ge_(4),Tb_(3)Co_(2)Ge_(4)and Dy_(3)Co_(2)Ge_(4),respectively.Our results suggest that Gd_(3)Co_(2)Ge_(4)and Dy_(3)Co_(2)Ge_(4)compounds are attractive candidates for cryogenic magnetic refrigeration applications.展开更多
In the conventional water treatment process,algae have a propensity to breach the filter barriers and potentially seep into the water distribution system,leading to an elevation in taste and odor compounds(T&O com...In the conventional water treatment process,algae have a propensity to breach the filter barriers and potentially seep into the water distribution system,leading to an elevation in taste and odor compounds(T&O compounds).This investigation delved into the seasonal fluctuations of algae penetration and the production of T&O compounds within the treatment units of Reservoir Water Plant 1(W1)and River Water Plant 2(W2).The findings indicated that despite the application of the‘pre-oxidation,coagulation and sedimentation(PCS),sand filtration,and disinfection’process,certain robust-walled filamentous Cyanobacteria,Bacillariophyta species,and small Chlorophyta genera managed to bypass the filters.The leakage of algal cells during autumn at W1 was particularly striking,with a peak of 1,170,000 cells/L.The concurrent assessment of the potential for T&O compound formation revealed an alarming high potential for 2-methylisoborneol(2-MIB)in the water leaving the plants,with concentrations soaring to 197.20 ng/L at W1 in autumn and 54.78 ng/L at W2 in summer.This underscores the significant capacity of residual algal cells to generate T&O compounds.Tracking the retention and penetration dynamics of algal cells across each drinking water treatment stage is crucial for surface water treatment facilities to develop effective operational and management strategies,thereby enhancing the safety and quality of drinking water for the end consumer.展开更多
Carbon dioxide(CO_(2))is the main greenhouse gas(GHG)released by human activities.The substitution of fossil resources by biomass as a bio-renewable resource,has significant potential to reduce GHG emissions.The appro...Carbon dioxide(CO_(2))is the main greenhouse gas(GHG)released by human activities.The substitution of fossil resources by biomass as a bio-renewable resource,has significant potential to reduce GHG emissions.The approach to biomass,as the only true full-scale alternative to fossil resources,is progressing rapidly.Converting biomass into furanic compounds,as versatile platform chemicals for synthesizing a wide range of bio-based products is the cornerstone of sustainable technologies.The extensive body of this review combines the biomass valorization to furanic compounds by CO_(2)utilization and furanic compounds conversion by CO_(2)fixation.These processes can be strategically applied through both‘thermochemical’and‘electrochemical’pathways,by utilizing CO_(2)from the atmosphere or industrial emission point and returning it to the natural carbon cycle.In the thermochemical pathway CO_(2)acts as a carbon source(carboxylation and polymerization)or active reaction assistant in the biomass conversion(CO_(2)-assisted conversion),without altering its oxidation state,facilitating the synthesis of valuable products and polymers.Conversely,in the electrochemical pathway,CO_(2)can be used as a carbon source(electrocarboxylation)to give the corresponding carboxylic acid,or it can undergo reduction,yielding methanol,carbon monoxide(CO),formic acid,and analogous compounds,while on the other side,furanic compounds undergo oxidation yielding high-value-added chemicals.Finally,potential future research directions are suggested to promote CO_(2)utilization and fixation in the valorization of biomass-derived furanic compounds,and challenges facing further research are highlighted.展开更多
NASICON-type Na_(3)V_(2)(PO_(4))_(3)(NVP)materials are seen as highly promising cathode materials in the field of sodium-ion batteries due to their low cost,a solid three-dimensional skeleton and good theoretical capa...NASICON-type Na_(3)V_(2)(PO_(4))_(3)(NVP)materials are seen as highly promising cathode materials in the field of sodium-ion batteries due to their low cost,a solid three-dimensional skeleton and good theoretical capacity,as well as high ionic conductivity.Nevertheless,the problem of low intrinsic electronic conductivity and energy density has limited the practical application of the materials.To address this issue,the relevant research team has successfully achieved remarkable research results through unremitting exploration and practical innovation.In this work,the crystal structure,ion migration mechanism and sodium storage mechanism of NVP cathode materials are systematically reviewed,with a focus on summarizing the latest progress of V-site doping modification research,classifying and exploring V-site doping from the perspectives of electronic structure,lattice strain and entropy,and briefly describing the optimization mechanism of V-site doping on electrochemical performance.In addition,the challenges and prospects for the future development of NVP cathode materials are presented,which are believed to provide new thinking for the design and development of high-performance NVP cathode materials and contribute to the large-scale application of sodium-ion batteries.展开更多
基金National Natural Science Foundation of China(Grant No.31600549).
文摘To explore the potential utilization of Elaeagnus mollis,we conducted a comprehensive assessment of its phytochemical composition,antioxidant properties,cholinesterase inhibition,and anti-HepG2 cell proliferation activity across different plant parts(branch wood,branch bark,and pericarp)using various solvents(water,methanol,ethanol,and n-hexane).Our findings revealed that water extracts displayed superior antioxidant activities in ABTS and RP assays,while methanol extracts exhibited better performance in DPPH and FRAP assays.Moreover,methanol extracts demonstrated the highest effectiveness against anti-HepG2 cell proliferation,whereas n-hexane extracts showed greater efficiency in cholinesterase inhibition.Notably,branch bark extracts exhibited the highest levels of phytochemical compounds,with both branch bark and pericarp extracts demonstrating significant effects in cholinesterase inhibition and anti-HepG2 cell proliferation.Correlation analysis indicated that phytochemical compounds were primarily responsible for the observed biological activities.Overall,extracts from the branch bark and pericarp of E.mollis showed promising potential for antioxidant and anticancer activities,suggesting their suitability for applications in the pharmaceutical industry as health-promoting products.
基金financial support from the National Key Research and Development Program of China(2022YFB4101800)National Natural Science Foundation of China(22278298)the Key Research&Development Program of Shandong Province,China(2024CXGC010410).
文摘CO_(2) hydrogenation to methanol is a critical technology for hydrogen energy conversion and a promising approach to mitigate the energy crisis and greenhouse effect.However,developing highly selective catalysts remains a major challenge for its practical application.Herein,we synthesize an efficient CoCuInO-r catalyst with Cu_(11)In_(9) and Co^(0) dual sites on In_(2)O_(3) via a sol-gel method.The Cu_(11)In_(9) intermetallic compound enhances H_(2) adsorption capacity and strength,and increases oxygen vacancy concentration on the catalyst surface,thereby improving CO_(2) activation and hydrogenation efficiency.Meanwhile,Co^(0) suppresses the desorption of the*CO species,facilitating its further hydrogenation to methanol.In-situ DRIFTS experiments indicate that the CO_(2) hydrogenation to methanol over CoCuInO-r follows the formate pathway.Compared with CuInO-r(containing Cu_(11)In_(9) on In_(2)O_(3)),CoCuInO-r exhibits a~20%increase in methanol selectivity and a 2-fold higher methanol space-time yield,reaching 7.68 mmol·g^(-1)·h^(-1) at 300℃ and 4 MPa.
基金Project supported by the Special Fund Project for Scientific Research Openness of the Key Laboratory of Medical Conditioning Functional Food Processing Technology in Weihai City(No.WHYY20240006)the Mid-Young Teachers Visiting Program of Qingdao Agricultural University(No.2024)+1 种基金the General Education Reform and Research Project of Qingdao Agricultural University(No.XJY2024063)the Research Results of the Ideological and Political Education Research Project of Qingdao Agricultural University(No:QNSZ2025023)。
文摘N-(2-Ethynylphenyl)acrylamides have emerged as key intermediates for the synthesis of complex heteropolycyclic compounds.The recent advances focus on the tandem cyclization involving these precursors,among which formation of fused six/N-three,six/five(N,S,O),and six/six-membered rings are highlighted.Nitrogen,sulfur,and oxygen incorporations into five-membered rings provide efficient routes to bioactive polycyclic molecules.These cyclization reactions exhibit excellent atom economy,high efficiency,and good functional group compatibility.Furthermore,novel catalytic systems and photochemical strategies also expand the synthetic applications of these precursors.Taken together,these advancements offer versatile tools for the synthesis of intricate heterocyclic scaffolds with broad applications in organic and medicinal chemistry.
基金financial support from the Natural Science Foundation of China(No.11904089,12174092,11674087)the Overseas Expertise Introduction Center for Discipline Innovation(D18025)+1 种基金the Program for Key Research and Development of Science and Technology in Hubei Province(grant No.2023BEB002)supported by the Young Science Foundation of Hubei University(Grant No.430/184303000047).
文摘Decoupling electrical and thermal properties to enhance the figure of merit of thermoelectric materials underscores an in-depth understanding of the mechanisms that govern the transfer of charge carriers.Typically,a factor that contributes to the optimization of thermal conductivity is often found to be detrimental to the electrical transport properties.Here,we systematically investigated 26 dimeric MX_(2)-type compounds(where M represents a metal and X represents a nonmetal element)to explore the influence of the electronic configurations of metal cations on lattice thermal transport and thermoelectric performance using first-principles calculations.A principled scheme has been identified that the filled outer orbitals of the cation lead to a significantly lower lattice thermal conductivity compared to that of the partly occupied case for MX_(2),due to the much weakened bonds manifested by the shallow potential well,smaller interatomic force constants,and higher atomic displacement parameters.Based on these findings,we propose two ionic compounds,BaAs and BaSe_(2),to realize reasonable high electrical conductivities through the structural anisotropy caused by the inserted covalent X_(2) dimers while still maintaining the large lattice anharmonicity.The combined superior electrical and thermal properties of BaSe_(2) lead to a high n-type thermoelectric ZT value of 2.3 at 500 K.This work clarifies the structural origin of the heat transport properties of dimeric MX_(2)-type compounds and provides an insightful strategy for developing promising thermoelectric materials.
基金Project supported by the Jilin Provincial Science and Technology Development Joint Fund Project(Grant No.YDZJ202201ZYTS581)supported by the Scientific and Technological Research Project of Jilin Provincial Education Department(Grant No.JJKH20240077KJ).
文摘As an extreme physical condition,high pressure serves as a potent means to substantially modify the interatomic distances and bonding patterns within condensed matter,thereby enabling the macroscopic manipulation of material properties.We employed the CALYPSO method to predict the stable structures of RbB_(2)C_(4)across the pressure range from 0 GPa to 100 GPa and investigated its physical properties through first-principles calculations.Specially,we found four novel structures,namely,P6_(3)/mcm-,Amm2-,P1-,and I4/mmm-RbB_(2)C_(4).Under pressure conditions,electronic structure calculations reveal that all of them exhibit metallic characteristics.The calculation results of formation enthalpy show that the P6_(3)/mcm structure can be synthesized within the pressure range of 0–40 GPa.Specially,the Amm2,P1,and I4/mmm structures can be synthesized above 4 GPa,6 GPa,10 GPa,respectively.Moreover,the estimated Vickers hardness value of I4/mmm-RbB_(2)C_(4)compound is 47 GPa,suggesting that it is a superhard material.Interestingly,this study uncovers the continuous transformation of the crystal structure of RbB_(2)C_(4)from a layered configuration to folded and tubular forms,ultimately attaining a stabilized cage-like structure under the pressure span of 0–100 GPa.The application of pressure offers a formidable impetus for the advancement and innovation in condensed matter physics,facilitating the exploration of novel states and functions of matter.
基金the Science and Technology Development Fund,Macao SAR,China(006/2022/ALC).
文摘The rare earth(RE)-transition metal(TM)based compounds have emerged as one of the best candi-dates for the application in eco-friendly and effective cooling technology due to their outstanding cryogenic magnetocaloric performances.In this work,three RE-TM germanides RE_(3)Co_(2)Ge_(4)(RE=Gd,Tb and Dy)were synthesized and characterized,aiming to investigating their structural,magnetic and magnetocaloric properties.These compounds crystallize in the Tb_(3)Co_(2)Ge_(4)-type monoclinic structure(space group C2/m,Z=2).Two successive ferromagnetic transitions are observed with T_(c) of 31 and 135 K for Gd_(3)Co_(2)Ge_(4),ferromagnetic and spin reorientation transitions are observed with Tc of 24 K and T_(s) of 19 K for Dy_(3)Co_(2)Ge_(4),all of which are second ordered.In contrast,Tb_(3)Co_(2)Ge_(4)exhibits a second order antiferromagnetic transition with T_(n) of 36 K,accompanied with a spin reorientation transition with T_(s) of 17 K.Furthermore,the ferromagnetic ground state for Gd_(3)Co_(2)Ge_(4)is also confirmed by the first-principles calculations.Significant cryogenic magnetocaloric performances are observed in these compounds,.The determined maximum magnetic entropy change(-ΔS_(M)^(max))under a magnetic field change(△H)of 0-7 T are 10.7,5.3 and 11.6 J/(kg·K)for Gd_(3)Co_(2)Ge_(4),Tb_(3)Co_(2)Ge_(4)and Dy_(3)Co_(2)Ge_(4),respectively.Our results suggest that Gd_(3)Co_(2)Ge_(4)and Dy_(3)Co_(2)Ge_(4)compounds are attractive candidates for cryogenic magnetic refrigeration applications.
基金supported by Shaanxi Provincial Key Research and Development Project(No.2022ZDLSF06-08)Shaanxi Provincial Key Scientific and Technological Innovation Team,China(No.2023-CX-TD-32)+1 种基金the Key Scientific Research Projects of Education Department of Shaanxi Province,China(No.22JY035)the Project of Youth Talent Lift Program of Shaanxi Association for Science and Technology,China(No.20230447).
文摘In the conventional water treatment process,algae have a propensity to breach the filter barriers and potentially seep into the water distribution system,leading to an elevation in taste and odor compounds(T&O compounds).This investigation delved into the seasonal fluctuations of algae penetration and the production of T&O compounds within the treatment units of Reservoir Water Plant 1(W1)and River Water Plant 2(W2).The findings indicated that despite the application of the‘pre-oxidation,coagulation and sedimentation(PCS),sand filtration,and disinfection’process,certain robust-walled filamentous Cyanobacteria,Bacillariophyta species,and small Chlorophyta genera managed to bypass the filters.The leakage of algal cells during autumn at W1 was particularly striking,with a peak of 1,170,000 cells/L.The concurrent assessment of the potential for T&O compound formation revealed an alarming high potential for 2-methylisoborneol(2-MIB)in the water leaving the plants,with concentrations soaring to 197.20 ng/L at W1 in autumn and 54.78 ng/L at W2 in summer.This underscores the significant capacity of residual algal cells to generate T&O compounds.Tracking the retention and penetration dynamics of algal cells across each drinking water treatment stage is crucial for surface water treatment facilities to develop effective operational and management strategies,thereby enhancing the safety and quality of drinking water for the end consumer.
基金the National Key R&D Program of China(No.2021YFC2101604)National Natural Science Foundation of China(Nos.U23A20123,22278339)+1 种基金Fujian Provincial Key Science and Technology Program of China(No.2022YZ037013)Xiamen University for the financial support.
文摘Carbon dioxide(CO_(2))is the main greenhouse gas(GHG)released by human activities.The substitution of fossil resources by biomass as a bio-renewable resource,has significant potential to reduce GHG emissions.The approach to biomass,as the only true full-scale alternative to fossil resources,is progressing rapidly.Converting biomass into furanic compounds,as versatile platform chemicals for synthesizing a wide range of bio-based products is the cornerstone of sustainable technologies.The extensive body of this review combines the biomass valorization to furanic compounds by CO_(2)utilization and furanic compounds conversion by CO_(2)fixation.These processes can be strategically applied through both‘thermochemical’and‘electrochemical’pathways,by utilizing CO_(2)from the atmosphere or industrial emission point and returning it to the natural carbon cycle.In the thermochemical pathway CO_(2)acts as a carbon source(carboxylation and polymerization)or active reaction assistant in the biomass conversion(CO_(2)-assisted conversion),without altering its oxidation state,facilitating the synthesis of valuable products and polymers.Conversely,in the electrochemical pathway,CO_(2)can be used as a carbon source(electrocarboxylation)to give the corresponding carboxylic acid,or it can undergo reduction,yielding methanol,carbon monoxide(CO),formic acid,and analogous compounds,while on the other side,furanic compounds undergo oxidation yielding high-value-added chemicals.Finally,potential future research directions are suggested to promote CO_(2)utilization and fixation in the valorization of biomass-derived furanic compounds,and challenges facing further research are highlighted.
基金supported by the National Natural Science Foundation of China(no.52574348)the Natural Science Foundation of Hebei Province(no.B2024501004)+2 种基金the Fundamental Research Funds for the Central Universities(no.N2423013)the Shijiazhuang Basic Research Project(no.241790667A)the Performance Subsidy Fund for Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province(no.22567627H).
文摘NASICON-type Na_(3)V_(2)(PO_(4))_(3)(NVP)materials are seen as highly promising cathode materials in the field of sodium-ion batteries due to their low cost,a solid three-dimensional skeleton and good theoretical capacity,as well as high ionic conductivity.Nevertheless,the problem of low intrinsic electronic conductivity and energy density has limited the practical application of the materials.To address this issue,the relevant research team has successfully achieved remarkable research results through unremitting exploration and practical innovation.In this work,the crystal structure,ion migration mechanism and sodium storage mechanism of NVP cathode materials are systematically reviewed,with a focus on summarizing the latest progress of V-site doping modification research,classifying and exploring V-site doping from the perspectives of electronic structure,lattice strain and entropy,and briefly describing the optimization mechanism of V-site doping on electrochemical performance.In addition,the challenges and prospects for the future development of NVP cathode materials are presented,which are believed to provide new thinking for the design and development of high-performance NVP cathode materials and contribute to the large-scale application of sodium-ion batteries.
