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Title: Capacitance of Ti3C2Tx MXene in Ionic Liquid Electrolyte

Journal Article · · Journal of Power Sources

Ti3C2Tx MXene, a two-dimensional (2D) early transition metal carbide, has shown an extremely high volumetric capacitance in aqueous electrolytes, but in a narrow voltage window (less than 1.23 V). The utilization of MXene materials in ionic liquid electrolytes with a large voltage window has never been addressed. Here, we report the preparation of the Ti3C2Tx MXene ionogel film by vacuum filtration for use as supercapacitor electrodes operating in 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMI-TFSI) neat ionic liquid electrolyte. Due to the disordered structure of the Ti3C2Tx hydrogel film and a stable spacing after vacuum drying, achieved through ionic liquid electrolyte immersion of the Ti3C2Tx hydrogel film, the Ti3C2Tx surface became accessible to EMI+ and TFSI- ions. A capacitance of 70 F g-1 together with a large voltage window of 3 V was obtained at a scan rate of 20 mV s-1 in neat EMI-TFSI electrolyte. The electrochemical signature indicates a capacitive behavior even at a high scan rate (500 mV s-1) and a high power performance. This work opens up the possibilities of using MXene materials with various ionic liquid electrolytes.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1346632
Alternate ID(s):
OSTI ID: 1359471
Journal Information:
Journal of Power Sources, Vol. 326; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 177 works
Citation information provided by
Web of Science

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Beyond Graphene Anode Materials for Emerging Metal Ion Batteries and Supercapacitors journal October 2018
Clay-Inspired MXene-Based Electrochemical Devices and Photo-Electrocatalyst: State-of-the-Art Progresses and Challenges journal January 2018
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Ultrathin MXene Nanosheets Decorated with TiO 2 Quantum Dots as an Efficient Sulfur Host toward Fast and Stable Li-S Batteries journal September 2018
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Functional MXene Materials: Progress of Their Applications journal August 2018
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Tracking Ionic Rearrangements and Interpreting Dynamic Volumetric Changes in Two‐Dimensional Metal Carbide Supercapacitors: A Molecular Dynamics Simulation Study journal January 2018
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Highly Stretchable and Compressible Self-Healing P(AA- co -AAm)/CoCl 2 Hydrogel Electrolyte for Flexible Supercapacitors journal November 2018
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Recent progress in layered transition metal carbides and/or nitrides (MXenes) and their composites: synthesis and applications journal January 2017
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Tracking Ionic Rearrangements and Interpreting Dynamic Volumetric Changes in Two‐Dimensional Metal Carbide Supercapacitors: A Molecular Dynamics Simulation Study journal March 2018
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Electrochemical and in-situ X-ray diffraction studies of Ti 3 C 2 T x MXene in ionic liquid electrolyte journal November 2016
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Two-Dimensional MXene with Controlled Interlayer Spacing for Electrochemical Energy Storage journal February 2017