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Title: Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides

Abstract

In this study, the use of fast surface redox storage (pseudocapacitive) mechanisms can enable devices that store much more energy than electrical double-layer capacitors (EDLCs) and, unlike batteries, can do so quite rapidly. Yet, few pseudocapacitive transition metal oxides can provide a high power capability due to their low intrinsic electronic and ionic conductivity. Here we demonstrate that two-dimensional transition metal carbides (MXenes) can operate at rates exceeding those of conventional EDLCs, but still provide higher volumetric and areal capacitance than carbon, electrically conducting polymers or transition metal oxides. We applied two distinct designs for MXene electrode architectures with improved ion accessibility to redox-active sites. A macroporous Ti 3C 2T x MXene film delivered up to 210 F g –1 at scan rates of 10 V s –1, surpassing the best carbon supercapacitors known. In contrast, we show that MXene hydrogels are able to deliver volumetric capacitance of ~1,500 F cm –3 reaching the previously unmatched volumetric performance of RuO 2.

Authors:
 [1]; ORCiD logo [2];  [3];  [2];  [4];  [4];  [2];  [3];  [2];  [3]; ORCiD logo [2]
  1. Drexel Univ., Philadelphia, PA (United States); Dept. of Chemical Engineering, Stanford, CA (United States)
  2. Drexel Univ., Philadelphia, PA (United States)
  3. Univ. Paul Sabatier, Toulouse (France); Reseau sur le Stockage Electrochimique de l'Energie (RS2E) (France)
  4. Bar-Ilan Univ., Ramat-Gan (Israel)
Publication Date:
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)
OSTI Identifier:
1399236
DOE Contract Number:
AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nature Energy; Journal Volume: 2; Journal Issue: 8
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE

Citation Formats

Lukatskaya, Maria R., Kota, Sankalp, Lin, Zifeng, Zhao, Meng -Qiang, Shpigel, Netanel, Levi, Mikhael D., Halim, Joseph, Taberna, Pierre -Louis, Barsoum, Michel W., Simon, Patrice, and Gogotsi, Yury G. Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides. United States: N. p., 2017. Web. doi:10.1038/nenergy.2017.105.
Lukatskaya, Maria R., Kota, Sankalp, Lin, Zifeng, Zhao, Meng -Qiang, Shpigel, Netanel, Levi, Mikhael D., Halim, Joseph, Taberna, Pierre -Louis, Barsoum, Michel W., Simon, Patrice, & Gogotsi, Yury G. Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides. United States. doi:10.1038/nenergy.2017.105.
Lukatskaya, Maria R., Kota, Sankalp, Lin, Zifeng, Zhao, Meng -Qiang, Shpigel, Netanel, Levi, Mikhael D., Halim, Joseph, Taberna, Pierre -Louis, Barsoum, Michel W., Simon, Patrice, and Gogotsi, Yury G. Mon . "Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides". United States. doi:10.1038/nenergy.2017.105.
@article{osti_1399236,
title = {Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides},
author = {Lukatskaya, Maria R. and Kota, Sankalp and Lin, Zifeng and Zhao, Meng -Qiang and Shpigel, Netanel and Levi, Mikhael D. and Halim, Joseph and Taberna, Pierre -Louis and Barsoum, Michel W. and Simon, Patrice and Gogotsi, Yury G.},
abstractNote = {In this study, the use of fast surface redox storage (pseudocapacitive) mechanisms can enable devices that store much more energy than electrical double-layer capacitors (EDLCs) and, unlike batteries, can do so quite rapidly. Yet, few pseudocapacitive transition metal oxides can provide a high power capability due to their low intrinsic electronic and ionic conductivity. Here we demonstrate that two-dimensional transition metal carbides (MXenes) can operate at rates exceeding those of conventional EDLCs, but still provide higher volumetric and areal capacitance than carbon, electrically conducting polymers or transition metal oxides. We applied two distinct designs for MXene electrode architectures with improved ion accessibility to redox-active sites. A macroporous Ti3C2Tx MXene film delivered up to 210 F g–1 at scan rates of 10 V s–1, surpassing the best carbon supercapacitors known. In contrast, we show that MXene hydrogels are able to deliver volumetric capacitance of ~1,500 F cm–3 reaching the previously unmatched volumetric performance of RuO2.},
doi = {10.1038/nenergy.2017.105},
journal = {Nature Energy},
number = 8,
volume = 2,
place = {United States},
year = {Mon Jul 10 00:00:00 EDT 2017},
month = {Mon Jul 10 00:00:00 EDT 2017}
}