期刊
ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 9, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202108798
关键词
covalent organic frameworks; high capacity; lithium-ion batteries; redox-active carbonyl sites
类别
资金
- National Natural Science Foundation of China [21671205, U1804126, 21771164, 52103277, U1804129]
- Key Projects of Science and Technology of Henan Province [212102210208, 212102210182]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Korean Government (MSIT) [2016R1A5A1009926, 2018M3D1A1058744, 2021R1A2B5B03001615]
- Development of ICT Materials, Components and Equipment Technologies),Technology Innovation Program - Ministry of Trade, Industry & Energy (MOTIE, Korea) [20012216]
In this study, a redox-active COF (TP-OH-COF) capable of accommodating 30 Li+ ions was synthesized for use as a high-capacity lithium-ion battery electrode material. With a unique chemical/structural feature, the TP-OH-COF demonstrated a high specific capacity of 764.1 mAh g(-1) and 63% capacity retention after 8000 cycles at a fast current density of 5.0 A g(-1).
Covalent organic frameworks (COFs) have attracted considerable attention as a facile and versatile design platform for advanced energy storage materials owing to their structural diversity, ordered porous structures, and chemical stability. In this study, a redox-active COF (TP-OH-COF) that can accommodate 30 Li+ ions is synthesized for potential use as an ultralong cyclable high-capacity lithium-ion battery electrode material. The TP-OH-COF is synthesized using triformylpholoroglucinol and 2,5-diaminohydroquinone dihydrochloride under solvothermal conditions. The accommodation of such exceptional Li+ ion content in the TP-OH-COF is achieved by alternately tethering redox-active hydroxyl and carbonyl sites on the pore walls. Owing to this unique chemical/structural feature, the TP-OH-COF delivers a high specific capacity of 764.1 mAh g(-1), and capacity retention of 63% after 8000 cycles at a fast current density of 5.0 A g(-1).
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