TY - JOUR
T1 - Surface coating of LiMn2O4 spinel via in situ hydrolysis route
T2 - Effect of the solution
AU - Yao, Jinhan
AU - Shen, Chaoqi
AU - Zhang, Pinjie
AU - Gregory, Duncan H.
AU - Wang, Lianbang
N1 - Funding Information:
Acknowledgments This work was supported by the International Science and Technology Cooperation Program of China (2012DFG42100), and the Doctoral Program of Higher Education of China (2011010113003), Zhejiang Provincial Natural Science Foundation of China (grant no. LQ12B01003), Zhejiang University of Technology start-up fund (grant no.101009529), National Natural Science Foundation of China (NSFC, grant nos.20506024 and 21173190) and the State Key Development Program for Basic Research of china (grant no. 2007CB216409).
PY - 2013/5
Y1 - 2013/5
N2 - 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.
AB - 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.
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U2 - 10.1007/s11581-012-0802-0
DO - 10.1007/s11581-012-0802-0
M3 - Article
AN - SCOPUS:84876109340
SN - 0947-7047
VL - 19
SP - 739
EP - 745
JO - Ionics
JF - Ionics
IS - 5
ER -