Nanosized LiMn{sub 2}O{sub 4} from mechanically activated solid-state synthesis
- Dipartimento di Chimica Fisica 'M. Rolla' e IENI-CNR, viale Taramelli 16, 27100 Pavia (Italy)
The synthesis of pure and Cr-doped nanosized LiMn{sub 2}O{sub 4} particles has been carried out by solid-state process on high-energy ground mixtures. In situ X-ray analysis demonstrates the spinel forms as single phase at 623 K passing through the Mn{sub 3}O{sub 4} precursor at temperatures as low as 573 K. In the doped high-energy ground mixture Li-rich spinel phase forms at 623 K and Cr ions insert in the spinel octahedral site only at 723 K. A mean particle size value of 60 A, quite independent of the reaction time, is obtained for T<673 K. For higher temperature the growing of the particles as a function of time is observed, independent of doping. The mechanical grinding seems to be the most suitable way to obtain impurity-free spinel phases at lower temperature and with smaller particle size with respect to manually ground mixtures by solid-state reaction and via sol-gel synthesis.
- OSTI ID:
- 20784899
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 2; Other Information: DOI: 10.1016/j.jssc.2005.11.019; PII: S0022-4596(05)00558-X; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
Similar Records
M{sup 3+}-modified LiMn{sub 2}O{sub 4} spinel intercalation cathodes. 1: Admetal effects on morphology and electrochemical performance
Copper-zinc-cobalt-chromium hydroxycarbonates and oxides