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Structural and conductivity studies of LiNi0.5Mn0.5O2 cathode materials for lithium-ion batteries

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Layered oxide LiMO2 (Ni, Co, Mn) have been proposed as cathode materials for lithium-ion batteries. Mainly LiNiO2 is accepted as an attractive cathode material because of its various advantages such as low cost, high discharge capacity, good reversibility. The LiNi0.5 Mn0.5 O2 powders are synthesized by a sol-gel method using citric acid as a chelating agent. The structure of the synthesized material is analyzed by using XRD, FT-IR and the microstructures of the samples are observed by using FESEM. The intensities and positions of the peaks are in a good agreement with the previous results. The morphological changes are clearly observed as a result of manganese substitution. The Fourier transform infrared (FT-IR) spectra obtained with KBr pellet data reveal the structure of the oxide lattice constituted by LiO6 and NiO6 octahedra. The conductivity studies are characterized by (EIS) in the frequency range of 42 Hz to 1 MHz at room temperature to 120 °C. The dielectric properties are analyzed in the framework of complex dielectric permittivity and complex electric modulus formalisms. It indicates that the conductivity increases with increasing temperature. The fitting data of EIS plots replicate the non-Debye relaxation process with negative temperature coefficient of resistance (NTCR) behavior.
Słowa kluczowe
Wydawca
Rocznik
Strony
404--411
Opis fizyczny
Bibliogr. 49 poz., rys., tab.
Twórcy
autor
  • Advanced Analytical Laboratory, Andhra University, Visakhapatnam-530003, India
autor
  • Advanced Analytical Laboratory, Andhra University, Visakhapatnam-530003, India
autor
  • Department of Physics, Andhra University, Visakhapatnam-530003, India
autor
  • Department of Physics, Andhra University, Visakhapatnam-530003, India
Bibliografia
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Uwagi
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-d465a826-06b1-4f53-a3b4-4ce456e4f029
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