Fast Solution-Combustion Synthesis of Nitrogen-Modified Li4Ti5O12 Nanomaterials with Improved Electrochemical Performance

A series of nitrogen-modified Li4Ti5O12 (N-LTO) nanomaterials with hierarchical micro/nanoporous structures are first synthesized via a facile one-step combustion process using thermal decomposition of urea. Successful deposition of a TiN thin layer onto the LTO surface was confirmed by transmission...

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Veröffentlicht in:ACS applied materials & interfaces 2014-05, Vol.6 (10), p.7895-7901
Hauptverfasser: Li, Xue, Lin, Huang-chang, Cui, Wang-jun, Xiao, Qian, Zhao, Jin-bao
Format: Artikel
Sprache:eng
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Zusammenfassung:A series of nitrogen-modified Li4Ti5O12 (N-LTO) nanomaterials with hierarchical micro/nanoporous structures are first synthesized via a facile one-step combustion process using thermal decomposition of urea. Successful deposition of a TiN thin layer onto the LTO surface was confirmed by transmission electron microscopy with energy-dispersive X-ray analysis, X-ray photoelectron spectroscopy, Raman spectroscopy, and thermogravimetric measurements. The electrochemical performances of the N-LTO nanomaterials are also investigated in this work. Compared with pristine LTO, the N-LTO nanomaterial with 1.1 wt % nitrogen exhibits a higher rate capability and better reversibility. At charge/discharge rates of 1, 2, 8, and 15 C, the discharge capacities of the N-LTO electrode were 159, 150, 128, and 108 mAh g–1, respectively. After 200 cycles at 1 C, its capacity retention was 98.5% with almost no capacity fading.
ISSN:1944-8244
1944-8252
DOI:10.1021/am501220f