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Seawater electrolyte-mediated high volumetric MXene-based electrochemical symmetric supercapacitors

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Abstract

The structure and morphology of titanium carbide (Ti3C2Tx) MXene, a new class of two dimensional (2D) materials, are investigated and reported. Ti3AlC2 MAX, treated with a hydrofluoric acid etching process, is used as a promising electrode material for electrochemical supercapacitor studies. The electrochemical supercapacitor performance of Ti3C2Tx as a negatrode in a natural seawater electrolyte solution, tested in a three-electrode system, demonstrated a specific capacitance of 67.7 F g−1 at a current density of 1 A g−1 which is in accordance with the volumetric specific capacitance of 121.8 F cm−3. A symmetric supercapacitor assembled with a Ti3C2Tx//Ti3C2Tx electrode configuration revealed a volumetric specific capacitance of 27.4 F cm−3 at 0.25 A g−1, and 96.6% capacitance retention even after 5000 cycles, which is superior to those reported previously in similar systems, suggesting the importance of abundant and cost-effective seawater as a natural electrolyte in developing energy storage devices.

Graphical abstract: Seawater electrolyte-mediated high volumetric MXene-based electrochemical symmetric supercapacitors

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Publication details

The article was received on 09 Apr 2018, accepted on 02 Jun 2018 and first published on 04 Jun 2018


Article type: Communication
DOI: 10.1039/C8DT01375F
Citation: Dalton Trans., 2018, Advance Article
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    Seawater electrolyte-mediated high volumetric MXene-based electrochemical symmetric supercapacitors

    Q. X. Xia, N. M. Shinde, T. Zhang, J. M. Yun, A. Zhou, R. S. Mane, S. Mathur and K. H. Kim, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT01375F

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