Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn 2 O 4 cathode materials
| Autor: | Jinghe Wu, Qishan Hu, Xiaoxiong Zeng |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope Solid-state reaction route Biomedical Engineering Analytical chemistry chemistry.chemical_element Bioengineering 02 engineering and technology engineering.material 010402 general chemistry Electrochemistry 01 natural sciences law.invention law General Materials Science Magnesium Spinel 021001 nanoscience & nanotechnology Condensed Matter Physics Cathode 0104 chemical sciences chemistry Electron diffraction Chemical engineering X-ray crystallography engineering 0210 nano-technology |
| Zdroj: | Micro & Nano Letters. 11:789-791 |
| ISSN: | 1750-0443 |
| DOI: | 10.1049/mnl.2016.0445 |
| Popis: | The lithium-ion battery cathode materials spinel LiMn2O4 and LiMg0.05Mn1.95O3.9Cl0.1 samples are synthesised by solid state reaction route, the effects of magnesium and chlorine co-doping on the structure, morphology and electrochemical performance of material LiMn2O4 are studied by X-ray diffraction, scanning electron microscope, electron diffraction spectroscope and galvanostatic charge–discharge, respectively. The results indicate that appropriate amount doping of magnesium and chlorine does not change the spinel structure of LiMn2O4, and the results reveal that the LiMg0.05Mn1.95O3.9Cl0.1 has an initial discharge capacity of 125.2 mAh/g at 0.2C, and the capacity retention is still as high as 89.3% even after 100 cycles, which is significantly higher than 79.6% of LiMn2O4. Especially, the LiMg0.05Mn1.95O3.9Cl0.1 shows the discharge capacity of 91.2 mAh/g at 10C, which higher than that of LiMn2O4 (64.3 mAh/g). The LiMg0.05Mn1.95O3.9Cl0.1 exhibits excellent cycling performance and rate capability than that of LiMn2O4. Thus, this is a very effective way for comprehensive improving LiMn2O4 electrochemical performance. |
| Databáze: | OpenAIRE |
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