Structural, impedance, dielectric and modulus analysis of LiNi1-x-y-0.02Mg0.02CoxZnyO2 cathode materials for lithium-ion batteries
p. 233-244
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oai:112.137.131.14:VNU_123-582142017-09-30T20:40:37Z Structural, impedance, dielectric and modulus analysis of LiNi1-x-y-0.02Mg0.02CoxZnyO2 cathode materials for lithium-ion batteries Murali, N. Margarette, S.J. Kondala Rao, V. Veeraiah, V. X-ray diffraction FESEM Dielectric Impedance Electric modulus p. 233-244 Mg, Co and Zn co-substituted layer-structured cathode materials LiNiCoxZnyMg0.02O2 (x - y - 0.0, 0.02 and 0.04) were prepared by a solid-state reaction method. The materials were systematically charac-terized by X-ray diffraction (XRD),field effect scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FT-IR), and electrical impedance spectroscopy (EIS) techniques. XRD analyses revealed the formation of a rhombohedral structure in the prepared materials with a typicala-NaFeO2 layered structure within R3mspace group. The grain size was determined by FESEM in the range from 3.19 to 3.85mm for all materials synthesized. The site of the local cation (LieO) and of the transition metal cations (MeO) in the materials were identified by FT-IR. The complex impedance and modulus studies suggested the presence of a non-Debye type of multiple relaxations in these materials. The dielectric constant was found to increase with increasing Co and Zn concentrations. The ac conductivity studies revealed a typical negative temperature coefficient of resistance (NTCR) behavior, and the conductivity values varied from 1.58 x 10-5 to 8.46 x 10-6 Scm-1. The activation energy determined from the Arrhenius plots at 50 Hz was in the range of 0.23e0.78 eV. 2017-08-24T04:16:27Z 2017-08-24T04:16:27Z 2017 Article 2468-2284 http://repository.vnu.edu.vn/handle/VNU_123/58214 other application/pdf H. : ĐHQGHN |
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Vietnam National University, Hanoi |
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X-ray diffraction FESEM Dielectric Impedance Electric modulus |
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X-ray diffraction FESEM Dielectric Impedance Electric modulus Murali, N. Margarette, S.J. Kondala Rao, V. Veeraiah, V. Structural, impedance, dielectric and modulus analysis of LiNi1-x-y-0.02Mg0.02CoxZnyO2 cathode materials for lithium-ion batteries |
| description |
p. 233-244 |
| format |
Article |
| author |
Murali, N. Margarette, S.J. Kondala Rao, V. Veeraiah, V. |
| author_facet |
Murali, N. Margarette, S.J. Kondala Rao, V. Veeraiah, V. |
| author_sort |
Murali, N. |
| title |
Structural, impedance, dielectric and modulus analysis of LiNi1-x-y-0.02Mg0.02CoxZnyO2 cathode materials for lithium-ion batteries |
| title_short |
Structural, impedance, dielectric and modulus analysis of LiNi1-x-y-0.02Mg0.02CoxZnyO2 cathode materials for lithium-ion batteries |
| title_full |
Structural, impedance, dielectric and modulus analysis of LiNi1-x-y-0.02Mg0.02CoxZnyO2 cathode materials for lithium-ion batteries |
| title_fullStr |
Structural, impedance, dielectric and modulus analysis of LiNi1-x-y-0.02Mg0.02CoxZnyO2 cathode materials for lithium-ion batteries |
| title_full_unstemmed |
Structural, impedance, dielectric and modulus analysis of LiNi1-x-y-0.02Mg0.02CoxZnyO2 cathode materials for lithium-ion batteries |
| title_sort |
structural, impedance, dielectric and modulus analysis of lini1-x-y-0.02mg0.02coxznyo2 cathode materials for lithium-ion batteries |
| publisher |
H. : ĐHQGHN |
| publishDate |
2017 |
| url |
http://repository.vnu.edu.vn/handle/VNU_123/58214 |
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1680964424871968768 |