Surface coating of LiMn₂O₄ spinel via in situ hydrolysis route: effect of the solution

Yao, J., Shen, C., Zhang, P., Gregory, D.H. and Wang, L. (2013) Surface coating of LiMn₂O₄ spinel via in situ hydrolysis route: effect of the solution. Ionics, 19(5), pp. 739-745. (doi: 10.1007/s11581-012-0802-0)

Abstract

Thin SiO2 shell consisting of nano-SiO2 particles can be deposited on to LiMn2O4 through the facile hydrolysis of tetraethoxysilane (TEOS) as a solution in either methanol or ethanol. The structure and surface morphologies of the modified and pristine materials were characterized by means of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The choice of solvent (methanol vs. ethanol) for TEOS hydrolysis has a profound effect on the physical and electrochemical properties of the resultant SiO2-coated LiMn2O4. Coated LiMn2O4 demonstrated an improved cycling ability compared to the uncoated counterpart. Moreover, samples coated using a TEOS–methanol solution showed better cycling ability in extended potential windows and at an elevated temperature than that coated using ethanol.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Yao, Mr Jinhan and Gregory, Professor Duncan
• Authors: Yao, J., Shen, C., Zhang, P., Gregory, D.H., and Wang, L.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Ionics
• ISSN: 0947-7047
• ISSN (Online): 1862-0760