Shen Changjie, Wang Libo, Zhou Aiguo, Wang Bo, Wang Xiaolong, Lian Weiwei, Hu Qianku, Qin Gang, Liu Xuqing
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China.
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
Nanomaterials (Basel). 2018 Jan 31;8(2):80. doi: 10.3390/nano8020080.
MXene is a new type of two-dimensional layered material. Herein, a GO/Ti₃C₂T nanocomposite was prepared by a simple liquid phase method, and the obtained GO/Ti₃C₂T was transformed into RGO/Ti₃C₂T under high temperature with Ar/H The prepared samples were characterized using X-ray diffraction (XRD), Raman measurement, scanning electron microscopy (SEM), energy disperse spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). As an electrode material in lithium-ion batteries, the RGO/Ti₃C₂T nanocomposite exhibited an excellent electrochemical performance and an excellent rate performance. Compared to pure Ti₃C₂T, the nanocomposite had a better reversible capacity at different current densities and had no attenuation after 200 cycles, which is one time higher than pure Ti₃C₂T. The improvement in the specific capacity was due to the excellent electrical conductivity and the unique structure of RGO, in which a charge transfer bridge was built among the Ti₃C₂T flakes. Such a bridge shortened the transmission distance of the electrons and ions and effectively controlled the restacking of the laminated materials.
MXene是一种新型二维层状材料。在此，通过简单的液相法制备了氧化石墨烯/碳化钛纳米复合材料（GO/Ti₃C₂T），并在高温下用氩气/氢气将所得的GO/Ti₃C₂T转化为还原氧化石墨烯/碳化钛（RGO/Ti₃C₂T）。使用X射线衍射（XRD）、拉曼测量、扫描电子显微镜（SEM）、能量色散光谱（EDS）和X射线光电子能谱（XPS）对制备的样品进行了表征。作为锂离子电池的电极材料，RGO/Ti₃C₂T纳米复合材料表现出优异的电化学性能和倍率性能。与纯Ti₃C₂T相比，该纳米复合材料在不同电流密度下具有更好的可逆容量，并且在200次循环后没有衰减，比纯Ti₃C₂T高出一倍。比容量的提高归因于RGO优异的导电性和独特结构，其中在Ti₃C₂T薄片之间建立了电荷转移桥。这种桥缩短了电子和离子的传输距离，并有效地控制了层状材料的重新堆叠。
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