Journal
JOURNAL OF POWER SOURCES
Volume 96, Issue 2, Pages 376-384Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0378-7753(00)00652-2
Keywords
spinel; Al-doped spinel; cycleability; the intensity ratio of (311)/(400) peaks; lithium battery
Ask authors/readers for more resources
LiAlxMn2-xO4 has been synthesized using various aluminum starting materials, such as Al(NO3)(3), Al(OH)(3). AlF3 and Al2O3 at 600-800 degreesC for 20 h in air or oxygen atmosphere. A melt-impregnation method was used to synthesize Al-doped spinel with good battery performance in this research. The Al-doped content and the intensity ratio of (3 1 1)/(4 0 0) peaks can be important parameters in synthesizing Al-doped spinel which satisfies the requirements of high discharge capacity and good cycleability at the same time, The decrease in Mn3+ ion by Al substitution induces a high average oxidation state of Mn ion in the LiAlxMn2-xO4 material. The electrochemical behavior of all samples was studied in Li/LiPF6-EC/DMC (1:2 by volume)/LiAlxMn2-xO4 cells. Especially, the initial and last discharge capacity of LiAl0.09Mn1.97O4 using LiOH, Mn3O4 and Al(OH)(3) complex were 128.7 and 115.5 mAh/g after 100 cycles. The Al substitution in LiMn2O4 was an excellent method of enhancing the cycleability of stoichiometric spinel during electrochemical cycling. (C) 2001 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available