Influence of different fuel agents on the combustion synthesis of the nanostructured Li1.05Mn2O4 oxide

• Main Author: Amaral,F. A.
• Publication Date: 2014
• Other Authors: Guerra,R. F., Santana,L. K., Canobre,S. C.
• Format: Article
• Language: eng
• Source: Materials research (São Carlos. Online)
• Download full: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700026
• topic: Solution Combustion Synthesis; cathode; Li1.05Mn2O4 spinel; lithium ion batteries

In this work nanostructured Li1.05Mn2O4 oxide was obtained by Solution Combustion Synthesis (SCS) using three different fuel agents in order to obtain a unique phase with a crystalline cubic structure belonging to the Fd3m spatial group. The phase of interest could be obtained, following the order: glycine (at 600 °C for 2 h) < urea (at 750 °C for 2 h) < maleic anhydride (at 750 °C for 4 h), with crystallite size in the range from 4.6 to 9.7 nm (nanometric character) and the unit cell parameter of the calcined samples at 750 °C for 2 h were similar to the JCPDS 35-0782 with cubic structure (a = 8.247 Å). Charge and discharge tests from the samples obtained by glycine fuel (at 750 °C for 4 h) presented the highest experimental specific capacities of 115 mA h g-1 and 92% of retention after 10 cycles.