4.5 Article

2D black TiO2-x nanoplate-decorated Ti3C2 MXene hybrids for ultrafast and elevated stable lithium storage

期刊

FLATCHEM
卷 20, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.flatc.2020.100152

关键词

Lithium ion battery; Anode material; Hybrid material; MXene; TiOx

资金

  1. Research Fund of the Natural Science Foundation of Jiangsu Province [BK20181056]
  2. Jiangsu Province Cultivation base for State Key Laboratory of Photovoltaic Science and Technology [SKLPST201901]
  3. Natural Science Foundation of Jiangsu Province-General Program [BK20171273]
  4. Natural Science Foundation of the Jiangsu Higher Education Institutions of China [19KJA540001]
  5. Six Talent Peak High-level Talent Project [JNHB-068]

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Novel 2D black TiO2-x nanoplate-decorated Ti3C2 MXene (TiO2-x/Ti3C2) hybrids were rationally designed and prepared by a facile wet process. The MXene nanosheets, serving as the carriers, not only enable the rapid electron and ion transport at the interface, but also avoid the aggregation of TiO2-x nanoplate during lithiation and de-lithiation. On the other hand, the presence of TiO2-x nanoplate also acts as the spacer to avert the MXene nanosheets from severe restacking. The successful formation of TiO2-x/Ti3C2 were examined by X-ray diffraction (XRD) analysis, fourier transform infrared spectroscopy (FT-IR), scanning electron spectroscopy (SEM), transmission electron spectroscopy (TEM) and X-ray photoelectron spectroscopy (XPS). When served as anodes in lithium ion batteries (LIBs), the resulting TiO2-x/Ti3C2 hybrid electrode delivers high specific capacity of 131 mA h g(-1) even cycling at a high current density of 5 A g(-1) (17 C) for 500 times and superior rate capability (even at a current density of 34 C, the specific capacity still remains at 115 mA h g(-1)), which highlight its great promise in the fields of energy storage and conversion.

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