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Title: Asymmetric Flexible MXene-Reduced Graphene Oxide Micro-Supercapacitor

Current microfabrication of micro–supercapacitors often involves multistep processing and delicate lithography protocols. In this study, simple fabrication of an asymmetric MXene–based micro–supercapacitor that is flexible, binder–free, and current–collector–free is reported. Here, the interdigitated device architecture is fabricated using a custom–made mask and a scalable spray coating technique onto a flexible, transparent substrate. The electrode materials are comprised of titanium carbide MXene (Ti 3C 2T x) and reduced graphene oxide (rGO), which are both 2D layered materials that contribute to the fast ion diffusion in the interdigitated electrode architecture. This MXene–based asymmetric micro–supercapacitor operates at a 1 V voltage window, while retaining 97% of the initial capacitance after ten thousand cycles, and exhibits an energy density of 8.6 mW h cm –3 at a power density of 0.2 W cm –3. Further, these micro–supercapacitors show a high level of flexibility during mechanical bending. Utilizing the ability of Ti 3C 2T xMXene electrodes to operate at negative potentials in aqueous electrolytes, it is shown that using Ti 3C 2T x as a negative electrode and rGO as a positive one in asymmetric architectures is a promising strategy for increasing both energy and power densities of micro–supercapacitors.
Authors:
 [1] ;  [1] ; ORCiD logo [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [4] ; ORCiD logo [1]
  1. Drexel Univ., Philadelphia, PA (United States)
  2. Drexel Univ., Philadelphia, PA (United States); King Abdullah Univ. of Science and Technology (KAUST), Thuwal (Kingdom of Saudi Arabia)
  3. Drexel Univ., Philadelphia, PA (United States); CIC energiGUNE, Alava (Spain)
  4. King Abdullah Univ. of Science and Technology (KAUST), Thuwal (Kingdom of Saudi Arabia)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Advanced Electronic Materials
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2199-160X
Publisher:
Wiley
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; asymmetric architectures; flexible electronics; graphene; micro-supercapacitors; MXene
OSTI Identifier:
1483176
Alternate Identifier(s):
OSTI ID: 1410379

Couly, Cedric, Alhabeb, Mohamed, Van Aken, Katherine L., Kurra, Narendra, Gomes, Luisa, Navarro-Suárez, Adriana M., Anasori, Babak, Alshareef, Husam N., and Gogotsi, Yury. Asymmetric Flexible MXene-Reduced Graphene Oxide Micro-Supercapacitor. United States: N. p., Web. doi:10.1002/aelm.201700339.
Couly, Cedric, Alhabeb, Mohamed, Van Aken, Katherine L., Kurra, Narendra, Gomes, Luisa, Navarro-Suárez, Adriana M., Anasori, Babak, Alshareef, Husam N., & Gogotsi, Yury. Asymmetric Flexible MXene-Reduced Graphene Oxide Micro-Supercapacitor. United States. doi:10.1002/aelm.201700339.
Couly, Cedric, Alhabeb, Mohamed, Van Aken, Katherine L., Kurra, Narendra, Gomes, Luisa, Navarro-Suárez, Adriana M., Anasori, Babak, Alshareef, Husam N., and Gogotsi, Yury. 2017. "Asymmetric Flexible MXene-Reduced Graphene Oxide Micro-Supercapacitor". United States. doi:10.1002/aelm.201700339. https://www.osti.gov/servlets/purl/1483176.
@article{osti_1483176,
title = {Asymmetric Flexible MXene-Reduced Graphene Oxide Micro-Supercapacitor},
author = {Couly, Cedric and Alhabeb, Mohamed and Van Aken, Katherine L. and Kurra, Narendra and Gomes, Luisa and Navarro-Suárez, Adriana M. and Anasori, Babak and Alshareef, Husam N. and Gogotsi, Yury},
abstractNote = {Current microfabrication of micro–supercapacitors often involves multistep processing and delicate lithography protocols. In this study, simple fabrication of an asymmetric MXene–based micro–supercapacitor that is flexible, binder–free, and current–collector–free is reported. Here, the interdigitated device architecture is fabricated using a custom–made mask and a scalable spray coating technique onto a flexible, transparent substrate. The electrode materials are comprised of titanium carbide MXene (Ti3C2Tx) and reduced graphene oxide (rGO), which are both 2D layered materials that contribute to the fast ion diffusion in the interdigitated electrode architecture. This MXene–based asymmetric micro–supercapacitor operates at a 1 V voltage window, while retaining 97% of the initial capacitance after ten thousand cycles, and exhibits an energy density of 8.6 mW h cm–3 at a power density of 0.2 W cm–3. Further, these micro–supercapacitors show a high level of flexibility during mechanical bending. Utilizing the ability of Ti3C2Tx–MXene electrodes to operate at negative potentials in aqueous electrolytes, it is shown that using Ti3C2Tx as a negative electrode and rGO as a positive one in asymmetric architectures is a promising strategy for increasing both energy and power densities of micro–supercapacitors.},
doi = {10.1002/aelm.201700339},
journal = {Advanced Electronic Materials},
number = 1,
volume = 4,
place = {United States},
year = {2017},
month = {11}
}

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