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Recent progress in layered transition metal carbides and/or nitrides (MXenes) and their composites: synthesis and applications




Since their inception in 2011, from the inaugural synthesis of multi-layered TiCTby etching TiAlCwith hydrofluoric acid (HF), novel routes with a myriad of reducing agents, etchants and intercalants have been explored and many new members have been added to the two-dimensional (2D) material constellation. Despite being endowed with the rare combination of good electronic conductivity and hydrophilicity, their inherent low capacities, for instance, temper their prospect for application for electrodes in energy storage systems. MXene-based composites, however, with a probable synergistic effect in agglomeration prevention, facilitating electronic conductivity, improving electrochemical stability, enhancing pseudocapacitance and minimizing the shortcomings of individual components, exceed the previously mentioned capacitance ceiling. In this review, we summarise the development and progress in the synthesis of various multi-layered carbides, carbonitrides and nitrides, and intercalants, as well as the subsequent processing in order to delaminate them into single- and/or few-layered and incorporate into MXene-based composites, focusing on their performance and application as transparent conductive films, environmental remediation, electromagnetic interference (EMI) absorption and shielding, electrocatalysts, Li-ion batteries (LIBs), supercapacitors and other electrochemical storage systems. © The Royal Society of Chemistry.



[Zhou, Kun]School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore; 639798, Singapore;
[Huang, Hui]Singapore Institute of Manufacturing Technologies (SIMTech), 71 Nanyang Drive, Singapore; 638075, Singapore;
[Xu, Jason Zhichuan;Hong Ng, Vincent Ming;Kong, Ling Bing;Lee, Pooi See]School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore; 639798, Singapore;
[Que, Wenxiu]Electronic Materials Research Laboratory, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, China;
[Ng, Vincent Ming Hong; Lee, Pooi See; Xu, Jason Zhichuan; Kong, Ling Bing] Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore
[Huang, Hui] Singapore Inst Mfg Technol SIMTech, 71 Nanyang Dr, Singapore 638075, Singapore
[Zhou, Kun] Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore
[Que, Wenxiu] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Elect Mat Res Lab, Xian, Peoples R China