Tuning the Electrochemical Performance of Titanium Carbide MXene by Controllable In Situ Anodic Oxidation

Tang，Jun1,2,3; Mathis，Tyler S.1; Kurra，Narendra1; Sarycheva，Asia1; Xiao，Xu1; Hedhili，Mohamed N.4; Jiang，Qiu5; Alshareef，Husam N.5; Xu，Baomin2; Pan，Feng3; Gogotsi，Yury1

2019

10.1002/anie.201911604

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   影响因子和分区

1433-7851

1521-3773

MXenes are a class of two-dimensional (2D) transition metal carbides, nitrides and carbonitrides that have shown promise for high-rate pseudocapacitive energy storage. However, the effects that irreversible oxidation have on the surface chemistry and electrochemical properties of MXenes are still not understood. Here we report on a controlled anodic oxidation method which improves the rate performance of titanium carbide MXene (TiCT T refers to -F, =O, -Cl and -OH) electrodes in acidic electrolytes. The capacitance retention at 2000 mV s (with respect to the lowest scan rate of 5 mV s) increases gradually from 38 % to 66 % by tuning the degree of anodic oxidation. At the same time, a loss in the redox behavior of TiCT is evident at high anodic potentials after oxidation. Several analysis methods are employed to reveal changes in the structure and surface chemistry while simultaneously introducing defects, without compromising electrochemically active sites, are key factors for improving the rate performance of TiCT. This study demonstrates improvement of the electrochemical performance of MXene electrodes by performing a controlled anodic oxidation.

anodic oxidation high-rate energy storage MXenes pseudocapacitance surface chemistry

SCI ; EI

英语

NI期刊

其他

Peacock Team Project funding from Shenzhen Science and Technology Innovation Committee[KQTD2015033110182370]

Chemistry

Chemistry, Multidisciplinary

WOS:000494097600001

WILEY-V C H VERLAG GMBH

20194507644617

Carbides ; Carbon nitride ; Chemical analysis ; Electrochemical electrodes ; Energy storage ; Surface chemistry ; Titanium carbide ; Transition metals ; Tuning

Energy Storage:525.7 ; Metallurgy and Metallography:531 ; Protection Methods:539.2.1 ; Physical Chemistry:801.4 ; Inorganic Compounds:804.2

CHEMISTRY

2-s2.0-85074537547

Scopus

1.A.J. Drexel Nanomaterials Institute and Department of Materials Science and EngineeringDrexel University,Philadelphia,19104,United States
2.Department of Materials Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China
3.School of Advanced MaterialsPeking University Shenzhen Graduate SchoolPeking University,Shenzhen,518055,China
4.King Abdullah University of Science and Technology (KAUST),Thuwal,Core Labs,23955-6900,Saudi Arabia
5.Materials Science and EngineeringPhysical Science and Engineering DivisionKing Abdullah University of Science and Technology (KAUST),Thuwal,23955-6900,Saudi Arabia

Tang，Jun,Mathis，Tyler S.,Kurra，Narendra,et al. Tuning the Electrochemical Performance of Titanium Carbide MXene by Controllable In Situ Anodic Oxidation[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2019,58(49):17849-17855.

Tang，Jun.,Mathis，Tyler S..,Kurra，Narendra.,Sarycheva，Asia.,Xiao，Xu.,...&Gogotsi，Yury.(2019).Tuning the Electrochemical Performance of Titanium Carbide MXene by Controllable In Situ Anodic Oxidation.ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,58(49),17849-17855.

Tang，Jun,et al."Tuning the Electrochemical Performance of Titanium Carbide MXene by Controllable In Situ Anodic Oxidation".ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 58.49(2019):17849-17855.