Controllable fabrication of C/Sn and C/SnO/Sn composites as anode materials for high-performance lithium-ion batteries
| Autor: | Yong Cheng, Zheng Yi, Chunli Wang, Limin Wang, Yaoming Wu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Fabrication
Nanocomposite Materials science General Chemical Engineering Composite number Nanoparticle chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Anode chemistry Environmental Chemistry Lithium Composite material 0210 nano-technology Dispersion (chemistry) Current density |
| Zdroj: | Chemical Engineering Journal. 330:1035-1043 |
| ISSN: | 1385-8947 |
| Popis: | The C/Sn and C/SnO/Sn nanocomposites with high performance are of great interest as anode materials for lithium-ion batteries (LIBs). In this paper, we employ a continuous-controllable method to fabricate the C/Sn and C/SnO/Sn composites in which nanometer-sized Sn(SnO) particles are uniformly dispersed and encapsulated into the porous carbon matrix. When evaluated as anode materials for LIBs, the C/Sn10 composite displays a reversible capacity of 501 mAh g−1 at a current density of 100 mA g−1 after 500 cycles. A high capacity of 425 mAh g−1 can be also obtained even at a current density of 1000 mA g−1. Further, the C/SnO/Sn-6h composite delivers a high reversible capacity of 504 mAh g−1 at a current density of 1000 mA g−1 after 1000 cycles and an excellent rate capacity of 300 mAh g−1 even at a very high current density of 10 A g−1. These outstanding performances can be due to the well dispersion of nanometer-sized Sn(SnO) particles in the porous carbon matrix, which can accommodate the large volume change and prevent Sn(SnO) nanoparticles from aggregating. |
| Databáze: | OpenAIRE |
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