Enhanced rate capability of lithium deficient spinel via controlling cooling rate
| Autor: | Jorge A. Calderón, Jorge Enrique Thomas, Ferley A. Vásquez |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Ethylene
Materials science Spinel Analytical chemistry 02 engineering and technology General Chemistry Cooling rates engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Cooling rate chemistry Impurity Lattice (order) engineering General Materials Science 0210 nano-technology |
| Zdroj: | Solid State Ionics. 345:115199 |
| ISSN: | 0167-2738 |
| DOI: | 10.1016/j.ssi.2019.115199 |
| Popis: | Lithium-deficient and Lithium-excess spinels LixMn1.6Ni0.4O4 (x = 1.05, 0.9) were synthesized by co-precipitation method assisted by ethylene glycol-oxalic acid. Control of cooling rates was performed in order to improve the crystallographic order, the lattice parameters and avoid the impurity precipitation. The samples were characterized physically and electrochemically. The best electrochemical performances were obtained for lithium-deficient spinels cooled at intermediate rates (2.2 °C min−1). For this optimized material, the discharge capacity was 122 mA h g−1 at 0.5C rate, retaining >83% of capacity at 10C rate and having good cycle life with >93.5% of initial capacity after 100 cycles at 0.5C rate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect