Issue 32, 2018

Molecular self-assembly of a nanorod N-Li4Ti5O12/TiO2/C anode for superior lithium ion storage

Abstract

Spinel lithium titanate (Li4Ti5O12, LTO) is one of the most appealing anode materials for lithium-ion batteries (LIBs) due to its long cycle life and high safety performance. However, its low intrinsic electronic conductivity limits its high rate capability. Herein, we develop a novel one-pot in situ molecular self-assembly approach to prepare a dual N- and anatase-TiO2- modified Li4Ti5O12/C nanorod material (NT-LTO/C). Polypyrrole (PPy), as a pivotal carbon and nitrogen source, is introduced to confine the morphology and particle size of the NT-LTO/C anode. Due to the synergistic effects of the multilevel particle structure, uniform carbon coating, N doping, anatase TiO2 pseudopotential effect and such benefits, the NT-LTO/C electrode delivers a high reversible capacity of 196.3 mA h gāˆ’1 at 0.5C, and it maintains 105.5 mA h gāˆ’1 even at an ultrahigh rate of 100C with progressive cycling of more than 3000 cycles. In addition, the three electrode pouch full-cell shows much smaller polarization than the pristine one. This novel and facile molecular self-assembly method has broad advanced functional material applications including for ceramics, polymer/carbon-based metal alloys and inorganic non-metallic materials.

Graphical abstract: Molecular self-assembly of a nanorod N-Li4Ti5O12/TiO2/C anode for superior lithium ion storage

Supplementary files

Article information

Article type
Paper
Submitted
19 Jun 2018
Accepted
17 Jul 2018
First published
17 Jul 2018

J. Mater. Chem. A, 2018,6, 15755-15761

Molecular self-assembly of a nanorod N-Li4Ti5O12/TiO2/C anode for superior lithium ion storage

S. Luo, P. Zhang, T. Yuan, J. Ruan, C. Peng, Y. Pang, H. Sun, J. Yang and S. Zheng, J. Mater. Chem. A, 2018, 6, 15755 DOI: 10.1039/C8TA05860A

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