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Issue 14, 2016
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H2O2 assisted room temperature oxidation of Ti2C MXene for Li-ion battery anodes

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Abstract

Herein we demonstrate that a prominent member of the MXene family, Ti2C, undergoes surface oxidation at room temperature when treated with hydrogen peroxide (H2O2). The H2O2 treatment results in opening up of MXene sheets and formation of TiO2 nanocrystals on their surface, which is evidenced by the high surface area of H2O2 treated MXene and X-ray diffraction (XRD) analysis. We show that the reaction time and the amount of hydrogen peroxide used are the limiting factors, which determine the morphology and composition of the final product. Furthermore, it is shown that the performance of H2O2 treated MXene as an anode material in Li ion batteries (LIBs) was significantly improved as compared to as-prepared MXenes. For instance, after 50 charge/discharge cycles, specific discharge capacities of 389 mA h g−1, 337 mA h g−1 and 297 mA h g−1 were obtained for H2O2 treated MXene at current densities of 100 mA g−1, 500 mA g−1 and 1000 mA g−1, respectively. In addition, when tested at a very high current density, such as 5000 mA g−1, the H2O2 treated MXene showed a specific capacity of 150 mA h g−1 and excellent rate capability. These results clearly demonstrate that H2O2 treatment of Ti2C MXene improves MXene properties in energy storage applications, such as Li ion batteries or capacitors.

Graphical abstract: H2O2 assisted room temperature oxidation of Ti2C MXene for Li-ion battery anodes

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Publication details

The article was received on 05 Jan 2016, accepted on 07 Mar 2016 and first published on 08 Mar 2016


Article type: Paper
DOI: 10.1039/C6NR00002A
Nanoscale, 2016,8, 7580-7587

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    H2O2 assisted room temperature oxidation of Ti2C MXene for Li-ion battery anodes

    B. Ahmed, D. H. Anjum, M. N. Hedhili, Y. Gogotsi and H. N. Alshareef, Nanoscale, 2016, 8, 7580
    DOI: 10.1039/C6NR00002A

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