| Autor: |
Mao Sen Fu, Ning Du, Lei Ni |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Journal of Alloys and Compounds. 591:65-71 |
| ISSN: |
0925-8388 |
| DOI: |
10.1016/j.jallcom.2013.12.177 |
| Popis: |
Porous hierarchical SnO 2 ceramics is achieved by oxidizing the flowerlike SnS 2 precursors, which are obtained via hydrothermal reaction between SnCl 4 and thioacetamide. The release rate of the sulfur ions from the sulfur source plays the most important role in the formation of flowerlike microstructures which define the morphology of the resulted SnO 2 . The obtained SnO 2 by annealing exhibits a porous hierarchical microstructure with large surface-to-volume ratio because of the large and small pores between and in the flowers. The porous hierarchical SnO 2 ceramics shows a promising capacity of 1645.5 mA h g −1 at the current of 100 mA g −1 , and remains 660.5 mA h g −1 after 20 cycles when used as anode of lithium-ion batteries. The enhanced cycling performance than SnO 2 nanoparticles should be due to that the porous hierarchical microstructure could provide more reaction sites and give channels making Li + transport more efficiently. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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