Nano-/Microstructured Si/C Composite with High Tap Density as an Anode Material for Lithium-Ion Batteries

Published

Journal Article

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Nanostructured Si materials are plagued by having a limited electrochemical performance and low tap density. Hence, we synthesized a nano-/microstructured Si/C composite with Si nanoparticles uniformly embedded into a carbon matrix, which had a tap density 5.3 times higher than that of Si nanoparticles. The nano-/microstructured Si/C composite shows a superior structural stability, which ensures a long cycle life with a capacity of 600mAhg-1 after 1000 cycles at 420mAg-1 . Moreover, the carbon matrix can provide three-dimensional electron-transfer pathways for Si nanoparticles to improve the electronic conductivity. Therefore, the Si/C composite anode material also exhibits an outstanding rate capability, which can still deliver a capacity of 510mAhg-1 at 5C. Thus, the nano-/microstructured Si/C composite with a high tap density possesses great potential in view of practical applications.

Full Text

Duke Authors

Cited Authors

  • Liu, J; Zhang, Q; Wu, ZY; Li, JT; Huang, L; Sun, SG

Published Date

  • April 15, 2015

Published In

Volume / Issue

  • 2 / 4

Start / End Page

  • 611 - 616

Electronic International Standard Serial Number (EISSN)

  • 2196-0216

Digital Object Identifier (DOI)

  • 10.1002/celc.201402347

Citation Source

  • Scopus