Preparation of 3D flower-like Ti3C2Tx microspheres by W/O emulsion-assisted assembly and their application for supercapacitors. Issue 8 (15th April 2022)

• Record Type: Journal Article
• Authors: Bu, Jidong; Zhang, Wenqian; Su, Yan; Xu, Lijian; Hou, Shifeng
• Is Part Of: Ceramics international. Volume 48:Issue 8(2022)
• Page Start: 10834
• Page End: 10842
• Publication Date: 2022-04-15
• Subjects: Ti3C2Tx -- W/O emulsion-assisted assembly -- 3D microspheres -- Supercapacitors; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.12.300
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, we proposed in situ controlled preparation of 3D flower-like Ti3 C2 Tx microspheres (FMXMSs) by water-in-oil (W/O) emulsion-assisted assembly. Polyethyleneimine (PEI), as a large molecule, can effectively stabilize the emulsion system. Ethylenediamine (EDA), as a weak cross-link agent, contains rich amino groups, which can effectively induce the assembly of Ti3 C2 Tx in spherical droplets and eventually form 3D flower-like Ti3 C2 Tx microspheres. By adjusting the water-oil volume ratio, the size of micro-emulsion droplets can be controlled, thus the structure and size of microspheres can finally be controlled. The structure has a large specific surface area (108.31 m 2 g -1 ) which can provide an effective ion diffusion pathway. As the supercapacitors electrode, the specific capacitance of FMXMSs is up to 224.57 F g -1 at 5 mV s -1 and 193.67 F g -1 at 0.5 A g -1 . Moreover, they also show good long-term cyclic stability. After 5000 cycles, the specific capacitance does not decay. The results indicate that W/O emulsion-assisted assembly is feasible for preparing MXenes microspheres with high electrochemical performance. Graphical abstract: Image 1