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

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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.

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Acknowledgements

This work was financially supported by the National Key R&D Program of China (No. 2021YFB2401900).

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Authors and Affiliations

  1. School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Yiguang Zhou, Shuhao Xiao, Rui Wu, Xiaobin Niu & Jun Song Chen

  2. Chongqing Medical and Pharmaceutical College, Chongqing, 401331, China

    Jinxia Jiang

  3. Institute for Advanced Study, Chengdu University, Chengdu, 610106, China

    Jun Song Chen

  4. Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, 518110, China

    Jun Song Chen

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  1. Yiguang Zhou
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  2. Shuhao Xiao
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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 Res. 16, 1513–1521 (2023). https://doi.org/10.1007/s12274-022-4706-7

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