Simplified Synthesis of Fluoride-Free Ti3C2Tx via Electrochemical Etching toward High-Performance Electrochemical Capacitors

Chen，Jizhang1; Chen，Minfeng1; Zhou，Weijun1; Xu，Xinwu1; Liu，Bo2; Zhang，Wenqing3; Wong，Chingping4

2022-02-22

10.1021/acsnano.1c09004

ACS Nano   影响因子和分区

1936-0851

1936-086X

MXenes have been intensively studied for electrochemical energy storage and other applications. However, time-consuming multistep procedures involving hypertoxic HF or alike are utilized in conventional synthesis methods of MXenes. Besides, −F terminal functional groups inevitably exist in these MXenes, detrimental to supercapacitor and battery performances. Herein, we develop a facile and time-saving electrochemical etching method to synthesize F-free and Cl-containing TiCT in a mixed LiOH and LiCl aqueous solution with an etching efficiency of 92.2%. During the synthesis, sonification alone is able to delaminate TiCT without using any hazardous organic intercalant. The obtained delaminated TiCT flakes are ∼3.8 μm in lateral size and ∼3.9 nm in thickness, and can be stable in an aqueous dispersion for at least 15 days. The filtrated TiCT film is 20.5 MPa in tensile strength, 13.4 GPa in Young’s modulus, and 1663 S cm in electrical conductivity, and exhibits specific capacitances of 323.7 F g, 1.39 F cm, and 1160 F cm for supercapacitors. Also, a flexible zinc-ion hybrid capacitor with energy density values of 20.8 mWh cm and 249.9 μWh cm is assembled by using the TiCT film as the cathode, and can maintain almost all its capacity under bending.

electrochemical etching fluoride-free synthesis MXenes supercapacitors Zn-ion hybrid capacitors

SCI ; EI

英语

ESI高被引 ; NI论文

其他

National Natural Science Foundation of China[51902165,12004145] ; Program of High-Level Talents in Six Industries of Jiangsu Province[XCL-040]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000776691400065

AMER CHEMICAL SOC

20220611602918

Chlorine compounds ; Elastic moduli ; Electrochemical etching ; Fluorine compounds ; Lithium compounds ; Tensile strength ; Titanium compounds

Electric Components:704.1 ; Materials Science:951

2-s2.0-85124120377

Scopus

1.College of Materials Science and Engineering,Nanjing Forestry University,Nanjing,210037,China
2.College of Mathematics and Physics,Jinggangshan University,Ji'an,343009,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.School of Materials Science and Engineering,Georgia Institute of Technology,Atlanta,30332,United States

Chen，Jizhang,Chen，Minfeng,Zhou，Weijun,et al. Simplified Synthesis of Fluoride-Free Ti3C2Tx via Electrochemical Etching toward High-Performance Electrochemical Capacitors[J]. ACS Nano,2022,16(2):2461-2470.

Chen，Jizhang.,Chen，Minfeng.,Zhou，Weijun.,Xu，Xinwu.,Liu，Bo.,...&Wong，Chingping.(2022).Simplified Synthesis of Fluoride-Free Ti3C2Tx via Electrochemical Etching toward High-Performance Electrochemical Capacitors.ACS Nano,16(2),2461-2470.

Chen，Jizhang,et al."Simplified Synthesis of Fluoride-Free Ti3C2Tx via Electrochemical Etching toward High-Performance Electrochemical Capacitors".ACS Nano 16.2(2022):2461-2470.