By leveraging the intrinsic advantages of electrical conductivity,enhancedπ-electron transfer,synergistic active sites,tunable electronic structures,and improved stability,a butterfly-shaped conjugatedπ-d copper-cat...By leveraging the intrinsic advantages of electrical conductivity,enhancedπ-electron transfer,synergistic active sites,tunable electronic structures,and improved stability,a butterfly-shaped conjugatedπ-d copper-catecholate-based metal-organic framework(Cu-DBC MOF),is constructed and delivered as a novel anodic electrode for lithium-ion batteries.The uniqueπ-d conjugation between copper ions and catecholate ligands in Cu-DBC significantly enhances its electrical conductivity and facilitates lithium-ion transport,addressing key limitations of conventional MOF-based anodes.As a result,Cu-DBC demonstrates exceptional electrochemical behavior,achieving a reversible capacity of 550 mAh g^(-1)within 100 mA g^(-1),showcasing excellent rate-capability properties with 192 mAh g^(-1)under 1000 mA g^(-1),and maintaining prolonged cycling stability,delivering 410±10 mAh g^(-1)after 100 cycles within 100 mA g^(-1)and 170±10 mAh g^(-1)after 2500 cycles even under 1000 mA g^(-1),respectively,based on the lithiation-delithiation reactions involving both redox reactions of Cu^(2+)/Cu^(+)and[Cu(OR)_(4)]^(3-)/[Cu(OR)_(4)]^(2-)couples.展开更多
基金supported by the Foundation of Sichuan University of Science&Engineering(2023RC02 and 202510622030)support from the National Natural Science Foundation of China(62304148)+4 种基金the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(22KJB150037)National Natural Science Foundation of China(22279061)the Natural Science Foundation of Jiangsu Province(BK20180514)support from City University of Hong Kong(9380117,7005620 and 7020040)Hong Kong Institute for Advanced Study,City University of Hong Kong,Hong Kong,P.R.China。
文摘By leveraging the intrinsic advantages of electrical conductivity,enhancedπ-electron transfer,synergistic active sites,tunable electronic structures,and improved stability,a butterfly-shaped conjugatedπ-d copper-catecholate-based metal-organic framework(Cu-DBC MOF),is constructed and delivered as a novel anodic electrode for lithium-ion batteries.The uniqueπ-d conjugation between copper ions and catecholate ligands in Cu-DBC significantly enhances its electrical conductivity and facilitates lithium-ion transport,addressing key limitations of conventional MOF-based anodes.As a result,Cu-DBC demonstrates exceptional electrochemical behavior,achieving a reversible capacity of 550 mAh g^(-1)within 100 mA g^(-1),showcasing excellent rate-capability properties with 192 mAh g^(-1)under 1000 mA g^(-1),and maintaining prolonged cycling stability,delivering 410±10 mAh g^(-1)after 100 cycles within 100 mA g^(-1)and 170±10 mAh g^(-1)after 2500 cycles even under 1000 mA g^(-1),respectively,based on the lithiation-delithiation reactions involving both redox reactions of Cu^(2+)/Cu^(+)and[Cu(OR)_(4)]^(3-)/[Cu(OR)_(4)]^(2-)couples.
