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Green and scalable electrochemical routes for cost‐effective mass production of MXenes for supercapacitor electrodes

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Carbon Energy 2023年第10期5卷 13-24页

作者： Zimo Huang Jiadong Qin Yuxuan Zhu Kelin He Hao Chen Hui Ying Hoh Munkhbayar Batmunkh Tania MBenedetti Qitao Zhang Chenliang Su Shanqing Zhang Yu Lin Zhong Queensland Micro‐and Nanotechnology Centre School of Environment and ScienceGriffith UniversityQueenslandNathanAustralia Centre for Catalysis and Clean Energy School of Environment and ScienceGriffith UniversityQueenslandGold CoastAustralia International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhenChina

One of the most unique properties of two-dimensional carbides and nitrides of transition metals(MXenes)is their excellent water dispersibility and yet possessing superior electrical conductivity but their industrial-scale application is limited by their costly chemical synthesis *** this work,the niche feature of MXenes was capitalized in the packed-bed electrochemical reactor to produce MXenes at an unprecedented reaction rate and yield with minimal chemical waste.A simple NH4F solution was employed as the green electrolyte,which could be used repeatedly without any loss in its ***,both fluoride and ammonium were found to play critical roles in the electrochemical etching,functionalization,and expansion of the layered parent materials(MAXs)through which the liberation of ammonia gas was *** electrochemically produced MXenes with excellent conductivity,applied as supercapacitor electrodes,could deliver an ultrahigh volumetric capacity(1408 F cm^(−3))and a volumetric energy density(75.8 Wh L^(−1)).This revolutionary green,energy-efficient,and scalable electrochemical route will not only pave the way for industrial-scale production of MXenes but also open up a myriad of versatile electrochemical modifications for improved functional MXenes.

关键词： packed‐bed electrochemical reactor electrochemical etching MXene supercapacitor

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