TY - JOUR
T1 - Metal Cation Pre-Intercalated Ti3C2TxMXene as Ultra-High Areal Capacitance Electrodes for Aqueous Supercapacitors
AU - Prenger, Kaitlyn
AU - Sun, Yangunli
AU - Ganeshan, Karthik
AU - Al-Temimy, Ameer
AU - Liang, Kun
AU - Dun, Chaochao
AU - Urban, Jeffrey J.
AU - Xiao, Jie
AU - Petit, Tristan
AU - Van Duin, Adri C.T.
AU - Jiang, De En
AU - Naguib, Michael
N1 - Funding Information:
This research is supported by the Fluid Interface Reactions, Structures, and Transport (FIRST) Center, an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under contract no. DE-AC02-05CH11231. XPS study at the Molecular Foundry User Facility was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under contract no. DE-AC01-05CH11231.
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/8/22
Y1 - 2022/8/22
N2 - Two-dimensional transition-metal carbides and nitrides "MXenes" have demonstrated great potential as electrode materials for electrochemical energy storage systems. This is especially true for delaminated Ti3C2Tx, which already shows outstanding gravimetric and volumetric capacitance, with areal capacitance limited by thickness (only a few microns). However, the performance of multilayer Ti3C2Txhas been more modest. Here, we report on using metal cation (viz., Na+, K+, and Mg2+) pre-intercalated multilayer Ti3C2Txas electrodes for aqueous supercapacitors. These electrodes are scalable and amenable to roll-to-roll manufacturing, with adjustable areal loadings of 5.2 to 20.1 mg/cm2. K-Ti3C2Txexhibited the highest capacitances at different scan rates. A gravimetric capacitance comparable to that of delaminated MXene of up to 300 F/g was achieved for multilayer K-Ti3C2Txbut with an outstanding ultra-high areal capacitance of up to 5.7 F/cm2, which is 10-fold higher than the 0.5 F/cm2of delaminated MXene and exceeds the 4.0 F/cm2of microengineered MXene electrodes.
AB - Two-dimensional transition-metal carbides and nitrides "MXenes" have demonstrated great potential as electrode materials for electrochemical energy storage systems. This is especially true for delaminated Ti3C2Tx, which already shows outstanding gravimetric and volumetric capacitance, with areal capacitance limited by thickness (only a few microns). However, the performance of multilayer Ti3C2Txhas been more modest. Here, we report on using metal cation (viz., Na+, K+, and Mg2+) pre-intercalated multilayer Ti3C2Txas electrodes for aqueous supercapacitors. These electrodes are scalable and amenable to roll-to-roll manufacturing, with adjustable areal loadings of 5.2 to 20.1 mg/cm2. K-Ti3C2Txexhibited the highest capacitances at different scan rates. A gravimetric capacitance comparable to that of delaminated MXene of up to 300 F/g was achieved for multilayer K-Ti3C2Txbut with an outstanding ultra-high areal capacitance of up to 5.7 F/cm2, which is 10-fold higher than the 0.5 F/cm2of delaminated MXene and exceeds the 4.0 F/cm2of microengineered MXene electrodes.
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U2 - 10.1021/acsaem.2c00653
DO - 10.1021/acsaem.2c00653
M3 - Article
AN - SCOPUS:85136546221
SN - 2574-0962
VL - 5
SP - 9373
EP - 9382
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 8
ER -