摘要
Three kinds of processes, high temperature solid state reaction, precipitation and solgel technique were used to synthsize spinel phase LiMn2O4. XRD, DTATG results show that phasepure spinel LiMn2O4 could be synthesized under the lowest calcined temperature by the solgel technique compared to the precipitation method and solid state reaction. BET, SEM and electrochemical measurements results demonstrate that the features of the powders affect directly the electrochemical capacities; large specific area and small homogeneous grain size are of advantage for the lithium ion insertion and extraction in the charge and discharge process.
Three kinds of processes, high temperature solid state reaction, precipitation and solgel technique were used to synthsize spinel phase LiMn2O4. XRD, DTATG results show that phasepure spinel LiMn2O4 could be synthesized under the lowest calcined temperature by the solgel technique compared to the precipitation method and solid state reaction. BET, SEM and electrochemical measurements results demonstrate that the features of the powders affect directly the electrochemical capacities; large specific area and small homogeneous grain size are of advantage for the lithium ion insertion and extraction in the charge and discharge process.
