Microstructural, impedance and conductivity studies of magnesium doped lithium titanate materials for Li-ion batteries
| Autor: | G. Chandana, K. Surendra, B. Vikram Babu, A. Rama Krishna, K. Samatha, M. Sushma Reddi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Magnesium Doping Spinel Analytical chemistry chemistry.chemical_element 02 engineering and technology engineering.material Conductivity 021001 nanoscience & nanotechnology 01 natural sciences Grain size Anode chemistry.chemical_compound chemistry Electrical resistivity and conductivity 0103 physical sciences engineering 0210 nano-technology Lithium titanate |
| Zdroj: | Materials Today: Proceedings. 43:1539-1544 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2020.09.366 |
| Popis: | In this research, we present the results on the effect of the partial doping of divalent Mg2 + in the place of monovalent Li + in LTO (lithium titanate, Li4Ti5O12) material. For the mother compound as well as Mg doped with the formula Li4-xMgxTi5O12 (x = 0 and 0.05), the partial influence of magnesium on structural, impedance and conductivity properties have been investigated. A systematic presentation of the results of the structural and electrical properties of the anode materials are studied through TG/DTG, XRD, FESEM with EDS and LCR. The observed diffraction peaks are in full agreement with the ordered LTO spinel structure belonging to the Fd-3 m space group. The doped material is quite large with grain size upto above 1.1 μm in diameter and also has a wide distribution range. The impedance properties of the Li4-xMgxTi5O12 (X = 0, 0.05) anode materials are studied in the temperature ranging from room temperature to 120 °C and frequency ranging from 20 Hz to 1 MHz by employing complex impedance spectroscopy (CIS). The conductivity studies reveal that the Mg doped material Li3.95 Mg0.05Ti5O12 exhibits highest electrical conductivity of 3.03 × 10–5 S/cm. |
| Databáze: | OpenAIRE |
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