skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Dual Phase Li 4Ti 5O 12–TiO 2 Nanowire Arrays As Integrated Anodes For High-rate Lithium-ion Batteries

Abstract

Lithium titanate (Li 4Ti 5O 12) is well known as a zero strain material inherently, which provides excellent long cycle stability as a negative electrode for lithium ion batteries. However, the low specific capacity (175 mA h g -1) limits it to power batteries although the low electrical conductivity is another intrinsic issue need to be solved. In this work, we developed a facile hydrothermal and ion-exchange route to synthesize the self-supported dual-phase Li 4Ti 5O 12–TiO 2 nanowire arrays to further improve its capacity as well as rate capability. The ratio of Li 4Ti 5O 12 to TiO 2 in the dual phase Li 4Ti 5O 12–TiO 2 nanowire is around 2:1. The introduction of TiO 2 into Li 4Ti 5O 12 increases the specific capacity. More importantly, by interface design, it creates a dual-phase nanostructure with high grain boundary density that facilitates both electron and Li ion transport. Compared with phase-pure nanowire Li 4Ti 5O 12 and TiO 2 nanaowire arrays, the dual-phase nanowire electrode yielded superior rate capability (135.5 at 5 C, 129.4 at 10 C, 120.2 at 20 C and 115.5 mA h g -1 at 30 C). In-situ transmission electron microscope clearly shows the nearmore » zero deformation of the dual phase structure, which explains its excellent cycle stability.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1170470
Report Number(s):
PNNL-SA-105729
48170
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nano Energy, 9:383-391
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Liao, Jin, Chabot, Victor, Gu, Meng, Wang, Chong M., Xiao, Xingcheng, and Chen, Zhongwei. Dual Phase Li4Ti5O12–TiO2 Nanowire Arrays As Integrated Anodes For High-rate Lithium-ion Batteries. United States: N. p., 2014. Web. doi:10.1016/j.nanoen.2014.06.032.
Liao, Jin, Chabot, Victor, Gu, Meng, Wang, Chong M., Xiao, Xingcheng, & Chen, Zhongwei. Dual Phase Li4Ti5O12–TiO2 Nanowire Arrays As Integrated Anodes For High-rate Lithium-ion Batteries. United States. doi:10.1016/j.nanoen.2014.06.032.
Liao, Jin, Chabot, Victor, Gu, Meng, Wang, Chong M., Xiao, Xingcheng, and Chen, Zhongwei. Tue . "Dual Phase Li4Ti5O12–TiO2 Nanowire Arrays As Integrated Anodes For High-rate Lithium-ion Batteries". United States. doi:10.1016/j.nanoen.2014.06.032.
@article{osti_1170470,
title = {Dual Phase Li4Ti5O12–TiO2 Nanowire Arrays As Integrated Anodes For High-rate Lithium-ion Batteries},
author = {Liao, Jin and Chabot, Victor and Gu, Meng and Wang, Chong M. and Xiao, Xingcheng and Chen, Zhongwei},
abstractNote = {Lithium titanate (Li4Ti5O12) is well known as a zero strain material inherently, which provides excellent long cycle stability as a negative electrode for lithium ion batteries. However, the low specific capacity (175 mA h g-1) limits it to power batteries although the low electrical conductivity is another intrinsic issue need to be solved. In this work, we developed a facile hydrothermal and ion-exchange route to synthesize the self-supported dual-phase Li4Ti5O12–TiO2 nanowire arrays to further improve its capacity as well as rate capability. The ratio of Li4Ti5O12 to TiO2 in the dual phase Li4Ti5O12–TiO2 nanowire is around 2:1. The introduction of TiO2 into Li4Ti5O12 increases the specific capacity. More importantly, by interface design, it creates a dual-phase nanostructure with high grain boundary density that facilitates both electron and Li ion transport. Compared with phase-pure nanowire Li4Ti5O12 and TiO2 nanaowire arrays, the dual-phase nanowire electrode yielded superior rate capability (135.5 at 5 C, 129.4 at 10 C, 120.2 at 20 C and 115.5 mA h g-1 at 30 C). In-situ transmission electron microscope clearly shows the near zero deformation of the dual phase structure, which explains its excellent cycle stability.},
doi = {10.1016/j.nanoen.2014.06.032},
journal = {Nano Energy, 9:383-391},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 19 00:00:00 EDT 2014},
month = {Tue Aug 19 00:00:00 EDT 2014}
}