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A safe and fast-charging lithium-ion battery anode using MXene supported Li3VO4

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Abstract

During fast charging, the commonly used Li-ion battery anode material, graphite, has a significant shortcoming, that is, its discharge potential is too low to guarantee the safety of batteries. Li3VO4 (LVO), an alternative anode material, has a safe discharge potential window of 0.5 V to 1.0 V vs. Li+/Li and high theoretical capacity (∼394 mA h g−1). However, the poor conductivity of LVO (∼10−10 S m−1) constrains its further applications. In this paper, we innovatively embedded uniform LVO onto a multilayered material, Ti3C2Tx MXene, by a sol–gel method. The Ti3C2Tx MXene nanolayers with high electrical conductivity (2.4 × 105 S m−1) served as a scaffold to load LVO nanoparticles. The LVO/Ti3C2Tx MXene composite exhibited remarkable electrochemical performance in terms of rate capability and long-term cycle stability in comparison with bare LVO and commercial graphite anodes. The LVO/Ti3C2Tx MXene composite delivered an initial capacity of ∼187 mA h g−1 and 146 mA h g−1 after 1000 cycles at 5C, compared to bare LVO (an initial capacity of ∼41 mA h g−1 and ∼40 mA h g−1 after 1000 cycles at 5C) and graphite (∼71 mA h g−1 after 1000 cycles at 5C). This work opens new possibilities of anode materials for safe and fast-charging Li-ion batteries.

Graphical abstract: A safe and fast-charging lithium-ion battery anode using MXene supported Li3VO4

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Publication details

The article was received on 23 Feb 2019, accepted on 04 Apr 2019 and first published on 04 Apr 2019


Article type: Paper
DOI: 10.1039/C9TA02037C
Citation: J. Mater. Chem. A, 2019, Advance Article

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    A safe and fast-charging lithium-ion battery anode using MXene supported Li3VO4

    Y. Huang, H. Yang, Y. Zhang, Y. Zhang, Y. Wu, M. Tian, P. Chen, R. Trout, Y. Ma, T. Wu, Y. Wu and N. Liu, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA02037C

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