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Two-dimensional MXenes for lithium-sulfur batteries

InfoMat 2020年第4期2卷 613-638页

作者： Chuanfang(John)Zhang Linfan Cui Sina Abdolhosseinzadeh jakob heier Laboratory for Functional Polymers EmpaSwiss Federal Laboratories for Materials Science and TechnologyDubendorfSwitzerland Department of Electronics and Nanoengineering Aalto UniversityAaltoFinland Institute of Materials Science and Engineering Ecole Polytechnique Federale de Lausanne(EPFL)LausanneSwitzerland

Rechargeable lithium-sulfur(Li-S)batteries have attracted significant research attention due to their high capacity and energy ***,their commercial applications are still hindered by challenges such as the shuttle effect of soluble lithium sulfide species,the insulating nature of sulfur,and the fast capacity decay of the *** efforts are devoted to address these problems through questing more conductive hosts with abundant polysulfide chemisorption sites,as well as modifying the separators to physically/chemically retard the polysulfides *** dimensional transition metal carbides,carbonitrides and nitrides,so-called MXenes,are ideal for confining the polysulfides shuttling effects due to their high conductivity,layered structure as well as rich surface *** such,MXenes have thus been widely studied in Li-S batteries,focusing on the conductive sulfur hosts,polysulfides interfaces,and ***,in this review,we summarize the significant progresses regarding the design of multifunctional MXene-based Li-S batteries and discuss the solutions for improving electrochemical performances in *** addition,challenges and perspectives of MXenes for Li-S batteries are also outlined.

关键词： flexible electronics Li-S battery MXene polysulfides shuttling two dimensional materials

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Two-Dimensional Transition Metal Carbides and Nitrides(MXenes): Synthesis, Properties, and Electrochemical Energy Storage Applications

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Energy & Environmental Materials 2020年第1期3卷 29-55页

作者： Chuanfang (John) Zhang Yonglu Ma Xuetao Zhang Sina Abdolhosseinzadeh Hongwei Sheng Wei Lan Amir Pakdel jakob heier Frank Nüesch Laboratory for Functional Polymers EmpaSwiss Federal Laboratories for Materials Science and TechnologyUberlandstrasse 129CH-8600Dubendorf Switzerland Key Laboratory of Special Function Materials and Structure Design Ministry of EducationSchool of Physical Science and TechnologyLanzhou UniversityLanzhou 730000China Institute of Materials Science and Engineering Ecole Polytechnique Federale de Lausanne(EPFL)Station 12CH-1015Lausanne Switzerland Assoc.Prof.A.Pakdel School of Chemistry University College Dublin (UCD) Belfield Dublin 4 Ireland

A family of 2D transition metal carbides and nitrides known as MXenes has received increasing attention since the discovery of Ti3C2 in 2011. To date, about 30 different MXenes with well-defined structures and properties have been synthesized, and many more are theoretically predicted to exist. Due to the numerous assets including excellent mechanical properties, metallic conductivity,unique in-plane anisotropic structure, tunable band gap, and so on, MXenes rapidly positioned themselves at the forefront of the 2D materials world and have found numerous promising applications. Particular interest is devoted to applications in electrochemical energy storage, whereby 2D MXenes work either as electrodes,additives, separators, or hosts. This review summarizes recent advances in the synthesis, fundamental properties and composites of MXene and highlights the state-of-the-art electrochemical performance of MXene-based electrodes/*** progresses in the field of supercapacitors and Li-ion batteries, Li-S batteries, Naand other alkali metal ion batteries are reviewed, and current challenges and new opportunities for MXenes in this surging energy storage field are presented. In the focus of interest is the possibility to boost device-level performance, particularly that of rechargeable batteries, which are of utmost importance in future energy technologies. Very recently, the 2019 Nobel Prize in Chemistry was awarded to the inventors of the Li-ion battery. For sure, this will provide an additional stimulation to study fundamental aspects of electrochemical energy storage.

关键词： battery energy storage MXene supercapacitor transition metal carbide

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