Strategies for Fabricating High‐Performance Electrochemical Energy‐Storage Devices by MXenes. Issue 11 (10th May 2021)

• Record Type: Journal Article
• Authors: Yu, LePing; Lu, Lu; Zhou, XiaoHong; Xu, Lyu; Alhalili, Zahrah; Wang, FengJun
• Is Part Of: ChemElectroChem. Volume 8:Issue 11(2021)
• Page Start: 1948
• Page End: 1987
• Publication Date: 2021-05-10
• Subjects: MXenes -- energy-storage devices -- supercapacitors -- batteries -- materials science; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202100385
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: Since 2011, MXenes, a family of two‐dimensional transition‐metal carbides, nitrides, and carbonitrides, have been investigated as electrodes, additives, separators, and hosts for energy‐storage devices (ESDs, including supercapacitors and metal‐ion batteries) due to their unique properties. This report focuses on the present technical issues in the field of energy storage and the corresponding solutions involving MXenes. It begins with a series of synthesis approaches (including top‐down and bottom‐up strategies) with a brief description of the structural properties, covering crystal lattice, structural defects, and surface chemistries. In addition, the impact of surface functional groups, composition of transition metals temperature and external pressure on the electrical properties of MXenes is discussed. Then, current issues of ESDs are listed with several MXene‐based solutions, including intercalation, modification of the terminating groups, chemical doping, vacancy engineering and the design of nanocomposites. Finally, the challenges in MXene‐based ESDs are summarised with some potential research directions in the future. Abstract : The application of electrochemical energy storage devices (ESDs) is hindered by some technical issues (e. g., poor electrical conductivity of the active materials). MXenes, with unique layered structure and exceptional electrical conductivity, are promising in fabricating high‐performance ESDs. This manuscript focuses on various MXene‐based strategies to improve the power density, energy density, and lifespan of ESDs.