Abstract
The enthalpy of formation of Li 2MnO 3 was measured by high temperature oxide solution calorimetry in a sodium molybdate solvent and the heat capacity of the compound was determined using differential scanning calorimetry. The enthalpy of formation of Li 2MnO 3 from the elements is slightly less exothermic than that of the orthorhombic and monoclinic modifications of LiMnO 2 but more exothermic than that of LiNiO 2, LiCoO 2, the LiNi 1-xCo xO 2 solid solutions and the Li 1+xMn 2-xO 4 spinels. The heat capacity of Li 2MnO 3 is also slightly lower than the estimated heat capacity based on stoichiometric amounts of Li 2O and MnO 2 according to the Neumann-Kopp approximation. The slight differences in heat capacities are attributed to the differences in the bonding environments of Li + ions in Li 2MnO 3 and the constituent binary oxide Li 2O. The thermochemical data presented here are essential for the advanced thermodynamic modeling of multicomponent electrode materials based on the promising xLi 2MnO 3·(1-x)LiMO 2 nano-composite cathode system.
| Original language | English |
|---|---|
| Pages (from-to) | 1072-1082 |
| Number of pages | 11 |
| Journal | Journal of the Ceramic Society of Japan |
| Volume | 124 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2016 |
Austrian Fields of Science 2012
- 104003 Inorganic chemistry
- 104011 Materials chemistry
Keywords
- Li2MnO3
- Enthalpy of Formation
- Heat Capacity
- HIGH-TEMPERATURE CALORIMETRY
- LITHIUM-ION BATTERIES
- RICH OXIDE CATHODE
- LIMO2 M
- MN
- SPINEL
- PHASE
- NI
- DIRECTIONS
- PROGRESS
- Li MnO
