Synthesis and Characterization of Stoichiometric Spinel-LiMn2O4

T. Y.S Panca Putra (Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Indonesia)
D Deswita (Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Indonesia)
A. Insani (Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Indonesia)
H. Mugiraharjo (Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Indonesia)
E. Sukirman (Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Indonesia)
A.K. Jahja (Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Indonesia)
T.H. Priyanto (Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency, Kawasan Puspiptek Serpong, Tangerang Selatan 15314, Indonesia)
S. Lee (High-Flux Advanced Neutron Application Reactor, Korea Atomic Energy Research Institute (KAERI), 150-1 Deokjin-Dong, 1045 Daedeokdaero, Yuseong-gu, Daejeon 305-600, Korea)
T. Kamiyama (High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan)

Atom Indonesia Journal
Vol 43, No 3 (2017): December 2017

In this study, spinel LiMn2O4 powder was synthesized from LiOH.H2O and MnOx by conventional and mechanical alloying (MA) methods, followed by heat treatment at 800 °C in O2 for four hours with cooling to room temperature in the furnace at 60 °C/h. It is found that both samples do not show phase transition in low temperature, and this occurred for different reasons. In the MA sample, the presence of Fe as contamination increased the Mn valence and hindered the occurrence of phase transition. The conventional sample does not show phase transition at low temperature due to stoichiometric content, without any contamination. In general, the absence of phase transition occurred due to synthesis condition employed in this study.