Structural, Electrical and Electrochemical Characterization of LiLa0.01Cr0.13Mn1.86O4 Cathode Material for Lithium-ion Battery

  • a Department of Physics, College of Natural Science, Arba Minch University, Arba Minch, Ethiopia

  • b Department of Physics, College of Science and Technology, Andhra University, Visakhapatnam, India


Well-crystallized cathode material is successfully synthesized.

The room temperature bulk conductivity is 2.7×10−5 S/cm.

The bulk conductivity obeys Arrhenius law with activation energy of 0.34 eV.

The sample shows the negative temperature coefficient of resistance (NTCR) type behavior.

The cathode material exhibits acceptable capacity retention performance.


The LiLa0.01Cr0.13Mn1.86O4 cathode material is successfully synthesized by solid-state reaction method. The X-ray diffraction (XRD) pattern reveals that the synthesized sample belongs to FdView the MathML sourcem space group with spinel structure. From FT-IR study of the material, two distinct strong absorption peaks are detected. From the electrical properties studies, it is found that the bulk conductivity of LiLa0.01Cr0.13Mn1.86O4 obeys Arrhenius principle with activation energy of 0.34 eV. The value of the real impedanceZdecreases at lower frequency with increasing temperature, indicating the negative temperature coefficient of resistance (NTCR) type behavior of the sample. The variation of the bulk resistance and dc conductivity as a function of temperature, and the variation of the ac conductivity and the real dielectric constant εas a function of frequency are also reported. The charge/discharge curves show two plateaus with initial discharge capacity of 107.6 mAh g−1. After 15 cycles, LiLa0.01Cr0.13Mn1.86O4 cathode is able to retain 95.1% of its initial capacity.