Improved rate capability of carbon coated Li3.9Sn 0.1Ti5O12 porous electrodes for Li-ion batteries

Biao Zhang, Zhen Dong Huang, Sei Woon Oh, Jang Kyo Kim

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

A new sol-gel process is developed to modify the Li4Ti 5O12 anode material for improved rate capability. The new process brings about the following effects, namely (i) doping of Sn2+ to form Li3.9Sn0.1Ti5O12, (ii) carbon coating and (iii) creation of a porous structure. The doping of Sn 2+ results in the lattice distortion without changing the phase composition. A thin layer of amorphous carbon is coated on the doped particles that contain numerous nanopores. The rate capability of the anode material made from the modified powder is significantly improved when discharged at high current rates due to the reduced charge transfer resistance.

Original languageBritish English
Pages (from-to)10692-10697
Number of pages6
JournalJournal of Power Sources
Volume196
Issue number24
DOIs
StatePublished - 15 Dec 2011

Keywords

  • Anode
  • Doping
  • Li-ion batteries
  • Lithium titanate

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