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

Jinhan Yao, Chaoqi Shen, Pinjie Zhang, Duncan H. Gregory, Lianbang Wang

Research output: Contribution to journalArticle

8 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)739-745
Number of pages7
JournalIonics
Volume19
Issue number5
DOIs
Publication statusPublished - Jan 1 2013

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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