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Title: Capacitance of Ti 3C 2T x MXene in Ionic Liquid Electrolyte

Ti 3C 2T x 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 Ti 3C 2T x 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 Ti 3C 2T x hydrogel film and a stable spacing after vacuum drying, achieved through ionic liquid electrolyte immersion of the Ti 3C 2T x hydrogel film, the Ti 3C 2T x 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.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [1]
  1. Univ. Paul Sabatier, Toulouse (France)
  2. Drexel Univ., Philadelphia, PA (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 326; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Supercapacitors; MXene; Ti3C2Tx; Ionogel; Ionic liquid
OSTI Identifier:
1346632
Alternate Identifier(s):
OSTI ID: 1359471

Lin, Zifeng, Barbara, Daffos, Taberna, Pierre-Louis, Van Aken, Katherine, Anasori, Babak, Gogotsi, Yury G., and Simon, Patrice. Capacitance of Ti3C2Tx MXene in Ionic Liquid Electrolyte. United States: N. p., Web. doi:10.1016/j.jpowsour.2016.04.035.
Lin, Zifeng, Barbara, Daffos, Taberna, Pierre-Louis, Van Aken, Katherine, Anasori, Babak, Gogotsi, Yury G., & Simon, Patrice. Capacitance of Ti3C2Tx MXene in Ionic Liquid Electrolyte. United States. doi:10.1016/j.jpowsour.2016.04.035.
Lin, Zifeng, Barbara, Daffos, Taberna, Pierre-Louis, Van Aken, Katherine, Anasori, Babak, Gogotsi, Yury G., and Simon, Patrice. 2016. "Capacitance of Ti3C2Tx MXene in Ionic Liquid Electrolyte". United States. doi:10.1016/j.jpowsour.2016.04.035. https://www.osti.gov/servlets/purl/1346632.
@article{osti_1346632,
title = {Capacitance of Ti3C2Tx MXene in Ionic Liquid Electrolyte},
author = {Lin, Zifeng and Barbara, Daffos and Taberna, Pierre-Louis and Van Aken, Katherine and Anasori, Babak and Gogotsi, Yury G. and Simon, Patrice},
abstractNote = {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.},
doi = {10.1016/j.jpowsour.2016.04.035},
journal = {Journal of Power Sources},
number = ,
volume = 326,
place = {United States},
year = {2016},
month = {4}
}