Self-assembled 3-D flower-shaped SnO2 nanostructures with improved electrochemical performance for lithium storage
✍ Scribed by Rong Yang; Yingan Gu; Yaoqi Li; Jie Zheng; Xingguo Li
- Book ID
- 103998990
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 756 KB
- Volume
- 58
- Category
- Article
- ISSN
- 1359-6454
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✦ Synopsis
Flower-shaped SnO 2 nanoplates were successfully synthesized via a simple hydrothermal treatment of a mixture of tin(II) dichloride dihydrate (SnCl 2 Á2H 2 O) and sodium citrate (Na 3 C 6 H 5 O 7 Á2H 2 O) in alkali solution. The obtained SnO 2 nanoplates were less than 5 nm thick and self-assembled into flower-shaped nanostructures. The introduction of citrate was essential for the preparation of the SnO 2 nanoplates. The nanoscale shape and self-assembled architecture of SnO 2 nanoparticles were mainly controlled by the alkalinity of the solution. When the self-assembled SnO 2 nanostructures were used as anode materials in Li-ion batteries, they exhibit a reversible capacity of 670 mA h g À1 after 30 cycles and an average capacity fading of 0.95% per cycle after the second cycle. The good electrochemical performance of the SnO 2 sample prepared via the hydrothermal synthesis indicates the possibility of fabricating specific self-assembled three-dimensional nanostructures for Li-ion batteries.