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Research Article

In-situ construction of Li4Ti5O12/rutile TiO2 heterostructured nanorods for robust and high-power lithium storage

Yiguang Zhou1, Shuhao Xiao1, Jinxia Jiang2( ), Rui Wu1, Xiaobin Niu1, Jun Song Chen1,3,4( )
School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
Institute for Advanced Study, Chengdu University, Chengdu 610106, China
Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen 518110, China
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Graphical Abstract

Nanorods with heterostructure of Li4Ti5O12/rutile TiO2 have been facilely constructed with long cycle life and superior high-rate performance for lithium storage.

Abstract

Li4Ti5O12 is considered as a safe and stable anode material for high-power lithium-ion batteries due to its “zero-strain” characteristic during the charge/discharge. However, the intrinsically low electronic conductivity leads to a deterioration in high-rate performance, impeding its intensive application. Herein, the Li4Ti5O12/rutile TiO2 (LTO/RT) heterostructured nanorods with tunable oxide phases have been in-situ fabricated by annealing the electrospun nanofiber precursor. By constructing such a heterostructured interface, the as-prepared sample delivers a high capacity of 160.3 mAh·g–1 at 1 C after 200 cycles, 125.5 mAh·g–1 at 10 C after 500 cycles and a superior capacity retention of 90.3% after 1,000 cycles at 30 C, outperforming the heterostructure-free counterparts of pure LTO, RT and the commercial LTO product. Density Functional Theory calculation suggests a possible synergistic effect of the LTO/RT interface that would improve the electronic conductivity and Li-ion diffusion.

Keywords

heterostructureLi4Ti5O12/rutile TiO2nanorodsdensity functional theorylithium storage

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Nano Research
Volume 16 Issue 1,
January 2023
Pages 1513-1521
DOI: 10.1007/s12274-022-4706-7
Cite this article:
Zhou Y, Xiao S, Jiang J, et al. In-situ construction of Li4Ti5O12/rutile TiO2 heterostructured nanorods for robust and high-power lithium storage. Nano Research, 2023, 16(1): 1513-1521. https://doi.org/10.1007/s12274-022-4706-7
Topics:
SynthesisNanorods

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Received: 15 May 2022
Revised: 05 June 2022
Accepted: 26 June 2022
Published: 08 July 2022
© Tsinghua University Press 2022
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