Comparative study of Co, Cr and Al-doped LiMnO2 prepared by ion exchange

Bulletin of materials science

Run Xiu Li¹  Ming Fei Xu²  Shang Chen¹  Xian Ming Wu¹  Ze Qiang He¹ 

[1] College of Chemistry and Chemical Engineering, Jishou University, Jishou Hunan, 416000, PR China$$College of Chemistry and Chemical Engineering, Jishou University, Jishou Hunan, 416000, PR ChinaCollege of Chemistry and Chemical Engineering, Jishou University, Jishou Hunan, 416000, PR China$$;College of Metallurgical Science and Engineering, Central South University, Changsha 410083, PR China$$College of Metallurgical Science and Engineering, Central South University, Changsha 410083, PR ChinaCollege of Metallurgical Science and Engineering, Central South University, Changsha 410083, PR China$$

关键词: Lithium ion;    doping;    electrochemistry.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The Co, Cr and Al-doped LiMnO₂ powders were prepared by ion exchange. Phase identification, surface morphology and electrochemical properties were studied by X-ray diffraction, scanning electron microscopy and galvanostatic chargeâ€�?�discharge experiments. The results show that the doped LiMnO₂ keeps the structure of LiMnO₂. As compared to LiMnO₂, Co, Cr and Al-doped LiMnO₂ offers higher discharge capacity and better cycling performance. The discharge capacities of Co, Cr and Al-doped LiMnO₂ decreases yet the cycling performance improves with the increase of doping concentration. For these doped LiMnO₂ at the same doping concentration, Cr-doping shows the highest discharge capacity and best cycling performance, Aldoping offers the lowest discharge capacity and Co-doping shows the worst cycling performance.

【 授权许可】

Unknown