Facile synthesis of N-doped carbon-coated Li4Ti 5O12 microspheres using polydopamine as a carbon source for high rate lithium ion batteries

Hongsen Li, Laifa Shen, Kuibo Yin, Jing Ji, Jie Wang, Xiaoyan Wang, Xiaogang Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Nitrogen-doped (N-doped) carbon-coated Li4Ti5O 12 microspheres are synthesized by a solution method combined with heat treatment, in which polydopamine-coated TiO2 is first prepared and subsequently transformed in situ into N-doped carbon-coated Li 4Ti5O12 microspheres. Importantly, neither templates nor rigorous reaction conditions are needed in this process that makes it simple, effective and general. The thickness of the resulting N-doped carbon coating layer can be tailored by controlling the coating time of dopamine. The optimum designed N-doped carbon-coated Li4Ti5O 12 microspheres with a continuous and high electronically conducting network demonstrated superior rate performance (123 mA h g-1 at 30 C) and excellent capacity retention (136.5 mA h g-1 after 200 cycles at 10 C) when used as anode material, indicating their promising application in high-rate lithium ion batteries.

Original languageEnglish
Pages (from-to)7270-7276
Number of pages7
JournalJournal of Materials Chemistry A
Volume1
Issue number24
DOIs
Publication statusPublished - 2013 Jun 28
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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