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Morphology and Characteristic change of $LiMn_2O_4$ Powder Prepared by Precipitation-Evaporation Method  

Kim, Guk-Tae (Division of Materials Science Engineering, Gyeongsang National University)
Shim, Young-Jae (Division of Materials Science Engineering, Gyeongsang National University)
Publication Information
Korean Journal of Crystallography / v.15, no.1, 2004 , pp. 44-50 More about this Journal
Abstract
Spinel structured lithium managanese oxide $(LiMn_2O_4)$ powder with well defined facetted morphology was prepared by precipitation-evaporation method. {111}, {110}, and {100} planes are mainly observed in the $LiMn_2O_4$ powder. And powder shape of tetradecahedron and octahedron was observed depending on the calcinations temperature. The observed powder morphology observed seemed to be related to the nonstoichiometry of the oxygen in the $LiMn_2O_4$ spinel structure. Oxygen nonstoichiometry might be responsible for the Jahn-teller effect and structure transition which in turn affects the surface energy of the {111}, {110}, and {100} planes. Powder shape transition from tetradecahedron to octahedron seemed to be related to the surface energy of the {111}, {110}, and {100} planes with oxygen nonstoichiometry.
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