Nitrogen-doped carbon coated Li 4Ti 5O 12 nanocomposite: Superior anode materials for rechargeable lithium ion batteries

Hongsen Li, Laifa Shen, Xiaogang Zhang, Jie Wang, Ping Nie, Qian Che, Bing Ding

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)

Abstract

Nitrogen-doped carbon coated Li 4Ti 5O 12 (NC-LTO) nanocomposite as an anode material for lithium-ion batteries (LIBs) is prepared with acetyl glucosamine as carbon source by pre-coating process combined with ball milling. X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy are used to characterize the NC-LTO materials. The results show that NC-LTO samples exhibit the obvious improvements in rate capability and cycling performance compared with the LTO samples coated by carbon (C-LTO) derived from sugar and pure LTO samples. The carbon pre-coating process could significantly decrease the agglomeration of TiO 2 precursors and the uniformly coated nitrogen-doped carbon increase the interfacial stability and electric conductivity of LTO. At the charge-discharge rate of 0.2 C, 5.0 C and 10.0 C and 20.0 C, the discharge capacities of NC-LTO samples are 167.4, 146.3, 133.4 and 128.2 mAh g -1, respectively. After 1000 cycles at 1 C, its capacity retention is 95.9% with nearly ignored capacity fading.

Original languageEnglish
Pages (from-to)122-127
Number of pages6
JournalJournal of Power Sources
Volume221
DOIs
Publication statusPublished - 2013 Jan 1
Externally publishedYes

Keywords

  • High rate capability
  • Lithium ion battery
  • Lithium titanate
  • Nitrogen-doped carbon

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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