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

通信作者：Guo, JB[1];Wu, HM[2];Song, JL[3];Guo, JB[3]

机构：[1]Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China;[2]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;[3]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Peoples R China;[4]Guiyang Univ, Coll Chem & Mat Engn, Guiyang 550005, Peoples R China;[5]Guizhou Qiancai S&T Dev Co Ltd, Guiyang 550003, Peoples R China

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

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China;corresponding author), Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;corresponding author), Guizhou Qiancai S&T Dev Co Ltd, Guiyang 550003, Peoples R China.

年份：0

外文期刊名：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000780685300001)】；

基金：Authors gratefully acknowledge financial support from Natural Science Foundation of China (52063005), Science and Technology Project of Guizhou (2016/5667) and (2021488), Science and Technology Foundation of Guizhou Province (2019/5635).

语种：英文

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.