钢铁钒钛2025，Vol.46Issue(6)：98-105,8.DOI:10.7513/j.issn.1004-7638.2025.06.012
Mg-Ti共掺杂LiNi0.5Mn1.5O4对提高材料结构稳定和电化学性能的协同效应研究
Synergistic effect of Mg-Ti co-doped LiNi0.5Mn1.5O4 on improving material structural stability and electrochemical performance
摘要
Abstract
Mg-Ti co-doped LNMO samples LiNi0.5-xMgxTiyMn1.5-yO4(x=0,0.02;y=0,0.03)were syn-thesized using self-aggregation method,as spinel cathod materil.Through XRD,FTIR,SEM,and EDS material characterization,as well as electrochemical performance testing,the correlation between the crystal morphology,particle size,distribution uniformity,charge discharge rate performance,and cyc-ling capacity stability of Mg-Ti co doped LiNi0.5Mn1.5O4 samples were systematically analyzed and stud-ied.The results show that Mg-Ti co-doping can appropriately increase the Mn3+content,enhance the dis-order degree of Fd3m space group,reduce the crystal particle size and make the distribution more uni-form,which help to improve the rate performance and cycling capacity stability.At 1C and 10C rates,the discharge capacities of LiNi0.48Mg0.02Ti0.03Mn1.47O4 material were 133 mAh/g and 102 mAh/g,re-spectively.After 200 cycles of 1C at room temperature,the discharge capacity remained at 123 mAh/g,with a capacity retention rate of 92.5％.The results of the influence of crystal structure and morphology on the electrochemistry of materials indicate that Mg-Ti co-doped has a synergistic effect,which signi-ficantly affects the rate performance and cycling stability of LiNi0.5Mn15O4.关键词
Mg-Ti共掺杂/协同效应/LiNi0.5Mn1.5O4/充放电倍率性能Key words
Mg-Ti co-doped/synergistic effect/LiNi0.5Mn1.5O4/charge discharge rate performance分类
信息技术与安全科学引用本文复制引用
黄振德,彭迪..Mg-Ti共掺杂LiNi0.5Mn1.5O4对提高材料结构稳定和电化学性能的协同效应研究[J].钢铁钒钛,2025,46(6):98-105,8.基金项目
广西自然科学基金项目(2018GXXNSFAA294042) （2018GXXNSFAA294042）
广西高校中青年教师科研基础能力提升项目(2021KY1280). （2021KY1280）
