文献类型：期刊文献

英文题名：The CeF4-coated spinel LiNi0.5Mn1.5O4 with improved electrochemical performance for 5?V lithium-ion batteries

作者：Chen, Tianci Wu, Hongming Zhou, Dengfeng Zhou, Ying Yan, Wei Song, Jiling Guo, Jianbing

第一作者：Chen, Tianci

机构：[1] Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China; [2] National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China; [3] School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [4] College of Chemistry and Materials Engineering, Guiyang University, Guiyang, 550005, China; [5] Guizhou Qiancai S&T Development Co., Ltd., Guiyang, 550003, China

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

通信机构：Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China;National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China;Guizhou Qiancai S&T Development Co., Ltd., Guiyang, 550003, China

年份：2022

卷号：33

期号：15

起止页码：11712-11724

外文期刊名：Journal of Materials Science: Materials in Electronics

收录：EI(收录号：20221611963737);Scopus(收录号：2-s2.0-85127972364)

语种：英文

外文关键词：Cerium compounds - Lithium-ion batteries - Cathodes - Manganese compounds - Crystal structure - Electric discharges - Nickel compounds - Electrolytes - Lithium compounds - Microstructure

摘要：The LiNi0.5Mn1.5O4 (LNMO) is an ideal cathode material of lithium-ion battery due to its high operating voltage. However, the corrosion of the electrolyte at high voltage is also a key issue for the LNMO cathode. In current work, the CeF4 were used to coat LNMO pristine via a simple calcining synthesis process. The microstructure and morphology of the pristine and CeF4-coated samples were studied by XRD, FTIR, XPS SEM, and TEM. The microstructure and morphology analysis show that CeF4 successfully coats on the surface of LNMO and forms a uniform coating layer. The CeF4 layers have little effect on the crystal structure of the LNMO and surface characters keep stable. The electrochemical performance study revealed that the CeF4-coated samples owned higher rate capacity and galvanostatic change–discharge capacity at 5C because the CeF4 layer was benefit to Li+ diffusion that decrease the polarization resistance. Moreover, the CeF4-3 has best cycling performance and rate capacity among all samples. After 100 charge–discharge cycles, the specific discharge capacity of CeF4-3 is still maintained 120 mAh/g with 97.6% capacity retention, while the pristine LNMO is only 97 mAh/g with 94.0% capacity retention. Therefore, CeF4 can be regarded as a promising anode modification material to improve the electrochemical performance. ? 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.