Study on Modification of spinel LiMn_2O_4 by Overcoating

Authors

Ren-gang ZHANG
Shi-xi ZHAO
Jung-lei XIA
Han-xing LIU

Corresponding Author

Ren_gang ZHANG

Abstract

The surface of spinel LiMn 2O 4 was modified by the sol_gel process with LiCoO 2_coated LiMn 2O 4 and studied by XRD,SEM and EPMA.The results have shown that the surface of the coated grains heated at 700 ℃ for 10h,which is cubic spinel,were Co_rich.The amount of Co 3+ in the grains changed owing to different place of the grain and decreased from surface to inner parts. Using the coated as the cathode of Li_ion cells,the initial capacity deceased slightly,but the amount of Mn 2+ solving in electrolyte decreased,Jahn_Teller effect was suppressed to a certain extent.The LiCoO 2_coated LiMn 2O 4 showed better cycling performance than the bare spinel LiMn 2O 4.

Keywords

Spinel LiMn 2O 4, Sol_gel, Surface coating, Cycling performance

DOI Link

https://doi.org/10.61558/2993-074X.3296

Publication Date

2002-08-28

Online Available Date

2002-08-28

Revised Date

2002-08-28

Received Date

2002-08-28

Recommended Citation

Ren-gang ZHANG, Shi-xi ZHAO, Jung-lei XIA, Han-xing LIU. Study on Modification of spinel LiMn_2O_4 by Overcoating[J]. Journal of Electrochemistry, 2002 , 8(3): Article 11.
DOI: 10.61558/2993-074X.3296
Available at: https://jelectrochem.xmu.edu.cn/journal/vol8/iss3/11