文献类型：期刊文献

英文题名：A hydrothermal synthesis of Ru-doped LiMn1.5Ni0.5O4cathode materials for enhanced electrochemical performance

作者：Zhou, Dengfeng Li, Junqi Chen, Can Lin, Fangchang Wu, Hongming Guo, Jianbing

第一作者：周登风;Zhou, Dengfeng

通信作者：Li, Junqi

机构：[1] College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China; [2] School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [3] National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China; [4] Guizhou Material Industrial Technology Institute, Material Technology Innovation Base of Guizhou Province, Guiyang, 550014, China

第一机构：College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

通信机构：College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

年份：2021

卷号：11

期号：21

起止页码：12549-12558

外文期刊名：RSC Advances

收录：EI(收录号：20211510208138);Scopus(收录号：2-s2.0-85103903975)

语种：英文

外文关键词：Fourier transform infrared spectroscopy - Particle size - Particle size analysis - X ray photoelectron spectroscopy - Electrochemical properties - Manganese compounds - Lithium compounds - Nickel compounds - Ruthenium - Ruthenium compounds - Scanning electron microscopy - Crystallinity - Electrochemical impedance spectroscopy - Electric discharges - Hydrothermal synthesis - X ray diffraction

摘要：An Ru-doped spinel-structured LiNi0.5Mn1.5O4(LNMO) cathode has been preparedviaa simple hydrothermal synthesis method. The as-prepared cathode is characterizedviaFourier transform infrared (FTIR) spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size distribution analysis, X-ray photoelectron spectroscopy (XPS) and electrochemistry performance tests. The FTIR spectroscopy and XRD analyses show that the Ru-doped LNMO has a good crystallinity with a disorderedFd3ˉmspace group structure. The disordered structure in the cathode increased and the LixNi1?xO impurity phase decreased when Ru addition increased. SEM shows that all samples are octahedral particles with homogeneous sizes distribution, and the particle size analysis shows that the Ru-doped samples have smaller particle size. XPS confirms the existence of Ru ions in the sample, and reveals that the Ru induce to part of Mn4+transfers to Mn3+in the LNMO. The electrochemical property indicated that the Ru-doped cathode exhibits better electrochemical properties in terms of discharge capacity, cycle stability and rate performance. At a current density of 50 mA g?1, the discharge specific capacity of the Ru-4 sample is 140 mA h g?1, which is much higher than that of the other samples. It can be seen from the rate capacity curves that the Ru-doped samples exhibit high discharge specific capacity, particularly at high current density. ? The Royal Society of Chemistry 2021.