Metal-sulfur batteries are recognized as a promising candidate for next generation electrochemical energy storage systems owing to their high theoretical energy density,low cost and environmental friendliness.However,...Metal-sulfur batteries are recognized as a promising candidate for next generation electrochemical energy storage systems owing to their high theoretical energy density,low cost and environmental friendliness.However,sluggish redox kinetics of sulfur species and the shuttle effect lead to large polarization and severe capacity decay.Numerous approaches from physical barrier,chemical adsorption strategies to electrocatalysts have been tried to solve these issues and pushed the rate and cycle performance of sulfur electrodes to higher levels.Most recently,single-atom catalysts(SACs)with high catalytic efficiency have been introduced into metal-sulfur systems to achieve fast redox kinetics of sulfur conversion.In this review,we systematically summarize the current progress on SACs for sulfur electrodes from aspects of synthesis,characterization and electrochemical performance.Challenges and potential solutions for designing SACs for high-performance sulfur electrodes are discussed.展开更多
Room temperature sodium–sulfur(RT Na-S)battery with high theoretical energy density and low cost has spurred tremendous interest,which is recognized as an ideal candidate for large-scale energy storage applications.H...Room temperature sodium–sulfur(RT Na-S)battery with high theoretical energy density and low cost has spurred tremendous interest,which is recognized as an ideal candidate for large-scale energy storage applications.However,serious sodium polysulfide shutting and sluggish reaction kinetics lead to rapid capacity decay and poor Coulombic efficiency.Recently,catalytic materials capable of adsorbing and catalyzing the conversion of polysulfides are profiled as a promising method to improve electrochemical performance.In this review,the research progress is summarized that the application of catalytic materials in RT Na-S battery.For the role of catalyst on the conversion of sulfur species,specific attention is focused on the influence factors of reaction rate during different redox processes.Various catalytic materials based on lightweight and high conductive carbon materials,including heteroatom-doped carbon,metals and metal compounds,single-atom and heterostructure,promote the reaction kinetic via lowered energy barrier and accelerated charge transfer.Additionally,the adsorption capacity of the catalytic materials is the key to the catalytic effect.Particular attention to the interaction between polysulfides and sulfur host materials is necessary for the exploration of catalytic mechanism.Lastly,the challenges and outlooks toward the desired design of efficient catalytic materials for RT Na-S battery are discussed.展开更多
A series of novel quinolinyl imidazolidin-2-imine nickel complexes with different substituents on the imidazolidin-2-imine ligand were synthesized and characterized.The complexes in the presence of methylaluminoxane(M...A series of novel quinolinyl imidazolidin-2-imine nickel complexes with different substituents on the imidazolidin-2-imine ligand were synthesized and characterized.The complexes in the presence of methylaluminoxane(MAO)as a cocatalyst catalyzed the copolymerization of norbornene(N)and styrene(S)or para-chlorostyrene(CS)with high activity(up to 1070 kg·mol^-1·h^-1).The installation of sterically bulky substituents on the imidazolidine-2-imine ligand was effective for the increase of the molecular weight and the comonomer content,affording high molecular weight copolymers with tunable CS content(0.57 mol%-11.7 mol%),in which the existence of CI group can provide reaction site for the further functionalization of copolymers as well as the synthesis of graft or cross-linked polymers.The linear relationship between the comonomer content and the glass transition temperature of the copolymers and the monomer reactivity ratios in the copolymerization indicated the formation of the expected functionalized cyclic olefin copolymers(COC).展开更多
基金supported by the National Natural Science Foundation of China(No.51972313,51525206 and 51927803)the Ministry of Science and Technology of China(2016YFA0200100 and 2016YFB0100100)+7 种基金the Strategic Priority Research Program of Chinese Academy of Science(No.XDA22010602)Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.Y201942)the Key Research Program of Chinese Academy of Sciences(No.KGZD-EW-T06)the Special Projects of the Central Government in Guidance of Local Science and Technology Development(No.2020JH6/10500024)the Program for Guangdong Introducing Innovative and Entrepreneurial Teamsthe Development and Reform Commission of Shenzhen Municipality for the development of the “Low-Dimensional Materials and Devices”discipline and the EconomicThe Bureau of Industry and Information Technology of Shenzhen for the“2017 Graphene Manufacturing Innovation Center Project”(No.201901171523)China Petrochemical Cooperation(No.218025)。
文摘Metal-sulfur batteries are recognized as a promising candidate for next generation electrochemical energy storage systems owing to their high theoretical energy density,low cost and environmental friendliness.However,sluggish redox kinetics of sulfur species and the shuttle effect lead to large polarization and severe capacity decay.Numerous approaches from physical barrier,chemical adsorption strategies to electrocatalysts have been tried to solve these issues and pushed the rate and cycle performance of sulfur electrodes to higher levels.Most recently,single-atom catalysts(SACs)with high catalytic efficiency have been introduced into metal-sulfur systems to achieve fast redox kinetics of sulfur conversion.In this review,we systematically summarize the current progress on SACs for sulfur electrodes from aspects of synthesis,characterization and electrochemical performance.Challenges and potential solutions for designing SACs for high-performance sulfur electrodes are discussed.
基金financial support from National Natural Science Foundation of China(Nos.52020105010,51972313,51927803,52072378,51902316 and 51525206)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA22010602)+2 种基金LiaoNing Revitalization Talents Program(No.XLYC1908015)Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.Y201942)the Special Projects of the Central Government in Guidance of Local Science and Technology Development(No.2020JH6/10500024)。
文摘Room temperature sodium–sulfur(RT Na-S)battery with high theoretical energy density and low cost has spurred tremendous interest,which is recognized as an ideal candidate for large-scale energy storage applications.However,serious sodium polysulfide shutting and sluggish reaction kinetics lead to rapid capacity decay and poor Coulombic efficiency.Recently,catalytic materials capable of adsorbing and catalyzing the conversion of polysulfides are profiled as a promising method to improve electrochemical performance.In this review,the research progress is summarized that the application of catalytic materials in RT Na-S battery.For the role of catalyst on the conversion of sulfur species,specific attention is focused on the influence factors of reaction rate during different redox processes.Various catalytic materials based on lightweight and high conductive carbon materials,including heteroatom-doped carbon,metals and metal compounds,single-atom and heterostructure,promote the reaction kinetic via lowered energy barrier and accelerated charge transfer.Additionally,the adsorption capacity of the catalytic materials is the key to the catalytic effect.Particular attention to the interaction between polysulfides and sulfur host materials is necessary for the exploration of catalytic mechanism.Lastly,the challenges and outlooks toward the desired design of efficient catalytic materials for RT Na-S battery are discussed.
基金the National Natural Science Foundation of China(No.21774018)the Fundamental Research Funds for the Central Universities(No.2232020A-05)the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning.
文摘A series of novel quinolinyl imidazolidin-2-imine nickel complexes with different substituents on the imidazolidin-2-imine ligand were synthesized and characterized.The complexes in the presence of methylaluminoxane(MAO)as a cocatalyst catalyzed the copolymerization of norbornene(N)and styrene(S)or para-chlorostyrene(CS)with high activity(up to 1070 kg·mol^-1·h^-1).The installation of sterically bulky substituents on the imidazolidine-2-imine ligand was effective for the increase of the molecular weight and the comonomer content,affording high molecular weight copolymers with tunable CS content(0.57 mol%-11.7 mol%),in which the existence of CI group can provide reaction site for the further functionalization of copolymers as well as the synthesis of graft or cross-linked polymers.The linear relationship between the comonomer content and the glass transition temperature of the copolymers and the monomer reactivity ratios in the copolymerization indicated the formation of the expected functionalized cyclic olefin copolymers(COC).
基金We gratefully acknowledge the financial support by the National Natural Science Foundation of China （No. 51672043）, the Natural Science Foundation of Shanghai （No. 15ZR1401200）, Program for Professor of Special Appointment （Eastern Scholar） at Shanghai Institutions of Higher Learning, Program of Shanghai Academic Research Leader （No. 16XD1400100）, Science and Technology Commission of Shanghai Municipality （No. 16JC1400700）, Innovation Program of Shanghai Municipal Education Commission （No. 2017-01-07-00-03- E00055） and the Program of Introducing Talents ofDiscipline to Universities （No. 111-2-04）. C. Y. H. thanks the Shanghai ChenGuang Program （No. 15CG33）, the Natural Science Foundation of Shanghai （No. 16ZR1401500）, and the Shanghai Sailing Program （No. 16YF1400400）.
