International Journal of modern physics B, ( ISI ), Volume (33), No (8), Year (2019-3) , Pages (1950063-1950063)

Title : ( LiMn2O4 nanopowders synthesized via gelatin-assisted sol–gel method: Optimization of pH and calcination temperature )

Authors: Nasrin Azad , Hadi Arabi , Shaban Reza Ghorbani , Ali Davoodi ,

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Abstract

In this research, LiMn2O4 nanopowders were synthesized via sol-gel method using gelatin as a novel chelating agent. The effect of temperature and pH on the structure, morphology and particle size of synthesized powders has been investigated by the differential thermal analysis -DTA-, the X-ray diffraction -XRD-, the Fourier transform infrared -FTIR-, and the field-emission scanning electron microscope -FESEM-. The crystal structure of LiMn2O4 has completely formed without any impurity phase at a calcination temperature of 750 ˚C. The peak intensity ratio of I400/I311, which presents the stability of LiMn2O4 structure, is bigger for the sample with pH= 4 than that of the samples with pH= 7 and 8. The sample with pH= 4 has smaller particles about 70 nm with more homogeneity and less agglomeration than that of the other samples. At calcination temperature to 850 ˚C, the size of particles, has become bigger and the particle surfaces show more clarity in all samples. The effect of pH value on electrochemical properties was studied by galvanostatic charge/discharge tests. The results show more capacity lost for the sample with pH=8 regards to the other samples.

Keywords

, LiMn2O4; sol, gel; structural properties; gelatin; pH; electrochemical properties
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@article{paperid:1073854,
author = {Azad, Nasrin and Arabi, Hadi and Ghorbani, Shaban Reza and Davoodi, Ali},
title = {LiMn2O4 nanopowders synthesized via gelatin-assisted sol–gel method: Optimization of pH and calcination temperature},
journal = {International Journal of modern physics B},
year = {2019},
volume = {33},
number = {8},
month = {March},
issn = {0217-9792},
pages = {1950063--1950063},
numpages = {0},
keywords = {LiMn2O4; sol-gel; structural properties; gelatin; pH; electrochemical properties},
}

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%0 Journal Article
%T LiMn2O4 nanopowders synthesized via gelatin-assisted sol–gel method: Optimization of pH and calcination temperature
%A Azad, Nasrin
%A Arabi, Hadi
%A Ghorbani, Shaban Reza
%A Davoodi, Ali
%J International Journal of modern physics B
%@ 0217-9792
%D 2019

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