| 1 | N-Doped Carbon Nanofibers Encapsulating CoO@Co_(9)S_(8) Nanoparticles:Preparation from S-Rich Co_(32) Coordination Cluster Precursors by Electrospinning and Application for Superior Li-ion Storage显示文摘Thiacalixarene-supported Co_(32) nanoclusters encapsulated in polyacrylonitrile nanofibers(Co_(32)@PAN-NFs)by electrospinning have been utilized as precursors to fabricate N-doped CoO@Co_(9)S_(8) carbon nanofibers(CoO@Co_(9)S_(8)@CNFs)for superior Li-ion storage.The S-rich Co_(32) clusters capped by organic sheets afforded the well dispersed cobalt oxide/sulfide nanoparticles embedded in carbon nanofiber composites by direct calcination.The N-doped CoO@Co_(9)S_(8)@CNFs nanocomposites have been utilized as anode materials for lithium ion battery with the reversible capabilities being of 1051.8,967.6,894.7,782.7,669.5 and 525.4 mA·h/g at 0.1,0.2,0.5,1,2 and 3 A/g,respectively.The CoO@Co_(9)S_(8)@CNFs also showed a relatively high stable capacity of 551.7 mA·h/g at the current density of 1 A/g after 200 cycles of rate experiments.The as-obtained N-doped CoO@Co_(9)S_(8)@CNFs nanocomposites exhibited superior reversible capacity,rate performance,Coulomb efficiency(74.5%vs.63.9%)and cyclic stability comparing with the CoO@Co_(9)S_(8)@C derived from simple annealing of Co_(32) templates. | YANG Siran AI Feixue LI Ziping ZHAO Guiyan BI Yanfeng | 2022 | Chemical Research in Chinese Universities2022，38，2： | 1 |
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