MOF-Derived Hollow Co9S8Nanoparticles Embedded in Graphitic Carbon Nanocages with Superior Li-Ion Storage
| Autor: | Joachim Maier, Chao Wu, Peter Kopold, Peter A. van Aken, Dongdong Xiao, Lin Gu, Yan Yu, Jun Liu |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
chemistry.chemical_element Nanoparticle Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cobalt sulfide 0104 chemical sciences Ion Biomaterials chemistry.chemical_compound Nanocages chemistry Chemical engineering General Materials Science 0210 nano-technology Capacity loss Carbon Current density Biotechnology Zeolitic imidazolate framework |
| Zdroj: | Small. 12:2354-2364 |
| ISSN: | 1613-6810 |
| DOI: | 10.1002/smll.201503821 |
| Popis: | Novel electrode materials consisting of hollow cobalt sulfide nanoparticles embedded in graphitic carbon nanocages (HCSP⊂GCC) are facilely synthesized by a top-down route applying room-temperature synthesized Co-based zeolitic imidazolate framework (ZIF-67) as the template. Owing to the good mechanical flexibility and pronounced structure stability of carbon nanocages-encapsulated Co9 S8 , the as-obtained HCSP⊂GCC exhibit superior Li-ion storage. Working in the voltage of 1.0-3.0 V, they display a very high energy density (707 Wh kg(-1) ), superior rate capability (reversible capabilities of 536, 489, 438, 393, 345, and 278 mA h g(-1) at 0.2, 0.5, 1, 2, 5, and 10C, respectively), and stable cycling performance (≈26% capacity loss after long 150 cycles at 1C with a capacity retention of 365 mA h g(-1) ). When the work voltage is extended into 0.01-3.0 V, a higher stable capacity of 1600 mA h g(-1) at a current density of 100 mA g(-1) is still achieved. |
| Databáze: | OpenAIRE |
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