基于Ti_(3)C_(2)T_(x)材料在钠离子电池中的应用进展

Progress in application of Ti_(3)C_(2)T_(x) materials in sodium-ion batteries

MXene由于具有独特的层状结构、高电子导电性和丰富的表面化学特性,在储能、电磁干扰屏蔽、催化、医药等方面有广泛的应用前景。Ti_(3)C_(2)T_(x)作为最早发现的MXene材料,其固有的金属导电特征、宽层间距和丰富的表面官能团,引起了钠离子电池领域研究人员的关注。本文综述了近年来Ti_(3)C_(2)T_(x)基材料在钠离子电池中的研究进展。首先从Ti_(3)C_(2)T_(x)材料的制备展开,概述多层和少层两类Ti_(3)C_(2)T_(x)材料的结构与电化学特性。随后结合研究的应用趋势,总结两类Ti_(3)C_(2)T_(x)材料的层间距改性、掺杂改性、形貌调控等手段对其储钠行为的影响。同时也分析了两类Ti_(3)C_(2)T_(x)基复合材料应用于钠离子电池负极的结构设计思路,指出合理的结构设计对电池性能至关重要。最后对Ti_(3)C_(2)T_(x)基复合材料在钠离子电池领域中面临的问题和挑战提出了一些建议。

MXene has a wide application prospect in energy storage,electromagnetic interference shielding,catalysis,medicine and other fields due to its unique layered structure,high electronic conductivity and rich surface chemical properties.Ti_(3)C_(2)T_(x),as the earliest discovered MXene material,has the possibility to achieve both high energy density and power density in the field of sodium ion batteries because of its inherent metal conductive characteristics,wide layer spacing and abundant surface functional groups,which is attracted by many researchers.Based on this,the research progress of Ti_(3)C_(2)T_(x) based materials in sodium ion batteries in recent years was reviewed in this paper.Firstly,the structure and electrochemical properties of Ti_(3)C_(2)T_(x) materials with multi-layer and few-layer were summarized by introducing the preparation of Ti_(3)C_(2)T_(x).Then,combined with the application trend of the study,the influences of layer spacing modification,doping modification and morphology regulation on the sodium storage behavior of the two kinds of Ti_(3)C_(2)T_(x) materials were summarized.The structural design ideas of the two kinds of Ti_(3)C_(2)T_(x) based composites applied to the anode of the sodium ion battery were also analyzed.It was pointed out that the reasonable structural design is vital to the battery performance.Finally,some suggestions for the problems and challenges faced by Ti_(3)C_(2)T_(x) based composites in the field of sodium ion batteries were given.