A Supercapacitor Electrode Synthesis Strategy: Proton Acid‐Treated Ti3C2TX Film with Single‐walled Carbon Nanotubes as a Reinforcement. Issue 27 (14th July 2022)

• Record Type: Journal Article
• Authors: Liu, Xingmin; Zhou, Reng; Yang, Dongxu; Lu, Shaowei; Wang, Jijie; Liu, Chunzhong; Wang, Sai
• Is Part Of: ChemistrySelect. Volume 7:Issue 27(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-07-14
• Subjects: Ti3C2TX -- SWCNTs -- Supercapacitors -- Mechanical properties -- Electrochemistry; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202200690
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: High‐performance electrode materials are the key to advances in the energy storage area. 2D transition metal carbide Ti3 C2 TX is the most widely studied MXene with a unique two‐dimensional structure, exhibiting excellent electrochemical properties and becoming a new choice electrode material for supercapacitors in many studies However, the poor mechanical properties of pure the Ti3 C2 TX film has become the bottlenecks for the application. Ti3 C2 TX with less Li + was prepared by proton acid colloid treatment, and then the single‐walled carbon nanotubes (SWCNTs) were used as interlayer barriers in the films to prevent Ti3 C2 TX layers from restacking to prepare Ti3 C2 TX and SWCNTs composite films. The composite films were tested and analyzed by different electrochemical techniques. The results showed that the film formed by MXene colloidal filtration after proton acid treatment was denser and the electrical conductivity reached 608700 S/m, which was 3.2 times higher than that of the original Ti3 C2 TX film. The composite film was prepared by mixing MXene colloidal proton acid treatment and SWCNTs, followed by filtration showd good capacitive capacity, reaching 270.5 F/g by testing in the 1 m H2 SO4 electrolyte with the CV cycle of 5 mV/s. And the specific capacitance retention reaches 97.6 % under 5000 CV cycles. The tensile test of composite film shows that the ultimate strength up to 50.3 MPa, which is about 2.3 times compared to original Ti3 C2 TX film. Abstract : Ti3 C2 TX dispersion prepared by HCl and LiF, what were treated with proton acid and then single‐walled carbon nanotubes were added. The composite film was prepared by using vacuum filtration method. The composite film has good mechanical and electrochemical properties and was good electrode materials for supercapacitors. The composite film with excellent overall performance provides feasibility for other fillers to be introduced into Ti3 C2 TX after proton acid treatment in the future.