Facile self-assembly of sandwich-like MXene V2CTx/Ag/rGO/MWCNTs layered multiscale structure nanocomposite. Issue 2 (15th January 2023)

• Record Type: Journal Article
• Authors: Zhang, Yan; Lu, WenBin; Zhou, JianPing; Sun, DaQian; Li, HongMei
• Is Part Of: Ceramics international. Volume 49:Issue 2(2023)
• Page Start: 1911
• Page End: 1921
• Publication Date: 2023-01-15
• Subjects: MXene -- Multiscale structure -- Compound materials -- Synergistic effect; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.09.156
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: MXene is widely used in the supercapacitors, fuel cells and other fields due to its excellent conductivity and hydrophilicity. V has multiple oxidation states that allow V2 CTx to participate in more redox reactions, and has good energy storage potential. Ag particles, rGO and MWCNTs are used to modify V2 CTx to fully exploit the electrochemical properties of V2 CTx . The doping of Ag particles, rGO and MWCNTs can well prevent the collapse and accumulation of V2 CTx . A number of Ag particles, rGO and MWCNTs enter into the layers of V2 CTx, which can increase the layer spacing. The expansion of interlayer spacing can expose more active contact sites and shorten the diffusion path of electrolyte ions. Ag particles, rGO and MWCNTs transform the original two-dimensional structure into a three-dimensional structure, which can provide a fast transport channel for charge transport and ion diffusion. Moreover, the close contact of Ag particles, rGO and MWCNTs enables the cross-boundary transport of carriers more rapid and convenient. The capacitance contribution rate of V2 CTx + Ag + rGO + MWCNTs composite that is modified with Ag particles, rGO and MWCNTs reaches 86.6%. The results show that the electrochemical performance of V2 CTx + Ag + rGO + MWCNTs composites has a more promising future.