文献类型：期刊文献

英文题名：A hydrothermal synthesis of Ru-doped LiMn1.5Ni0.5O4 cathode materials for enhanced electrochemical performance

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

第一作者：周登凤;Zhou, Dengfeng

通信作者：Li, JQ[1];Guo, JB[1];Guo, JB[2]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Peoples R China;[3]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;[4]Mat Technol Innovat Base Guizhou Prov, Guizhou Mat Ind Technol Inst, Guiyang 550014, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;corresponding author), Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000637953200012)】；

基金：This work is fnancially supported by National Natural Science Foundation of China (51774012), Program of Application and Industrialization of Scientific and Technological Achievements of Guizhou (2016-4538), High-level Innovative Talents Training Project of Guizhou (2016/5667, 2019/5035), and Natural Science Research Project of Guizhou Department of Education ([2019] 068).

语种：英文

外文关键词：Cathodes - Crystallinity - Electric discharges - Electrochemical properties - Electrochemistry - Fourier transform infrared spectroscopy - Particle size - Particle size analysis - Scanning electron microscopy - Spectrum analysis - X ray diffraction - X ray photoelectron spectroscopy

摘要：An Ru-doped spinel-structured LiNi0.5Mn1.5O4 (LNMO) cathode has been prepared via a simple hydrothermal synthesis method. The as-prepared cathode is characterized via Fourier 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 disordered Fd3m space 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.