Shen C.-HGundakaram RRU-SHI LIUSheu H.-S.2022-12-142022-12-1420011470479Xhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0035819433&doi=10.1039%2fb007120j&partnerID=40&md5=d123f24f7ca5600f4fa71dd5e8309a40https://scholars.lib.ntu.edu.tw/handle/123456789/626205The phase transition in spinel LiMn2O4 was investigated using powder synchrotron radiation diffraction. A transition from cubic (Fd3m) to orthorhombic (Fddd) was observed around T = 220 K. Increasing the average valence of Mn by doping Co into the [Mn2O4] framework, LiMn1.9Co0.1O4, reduced the concentration of Mn3+ ions, suppressed the Jahn-Teller distortion and the cubic phase was retained at low temperature. © The Royal Society of Chemistry 2001.Cobalt; Doping (additives); Energy dispersive spectroscopy; Low temperature effects; Phase transitions; Synchrotron radiation; Synthesis (chemical); X ray powder diffraction; Solid state reactions; Lithium compoundsjournal article10.1039/b007120j2-s2.0-0035819433