| Autor: |
Murali, N., Margarette, S.J., Rao, V. Kondala, Sailaja, J. Madhuri, Mammo, Tulu Wegayehu, Himakar, P., Babu, B. Kishore, Veeraiah, V. |
| Zdroj: |
South African journal of chemical engineering; December 2017, Vol. 24 Issue: 1 p213-221, 9p |
| Abstrakt: |
Layered structure LiNi0.45M0.1Mn0.45O2(MCu and Al) cathode materials for lithium-ion batteries are synthesized by sol–gel auto combustion method. The structural, morphological, electrical and magnetic properties are examined by X-ray diffraction (XRD), field effect scanning electron microscope FESEM, FT-IR, EIS and ESR. XRD data revealed the rhombohedral and α-NaFeO2structure with a space group R-3m. The electrical conductivity, dielectric constant, and dielectric loss are measured in the room temperature at a frequency ranging from 20 Hz to 1 MHz. The electrical conductivity of the compound is measured by AC impedance. An effective improvement in the electrical conductivity of order 5.42 × 10−6 S/cm is observed for the copper doped LNMO compounds. ESR spectra is recorded at room temperature on a Bruker EMX model X-band spectrometer operating at a frequency of 9.50 GHz. The critical dopants of Cu, with minimum g-factor and maximum line-width (W) are observed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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