• B JANARTHANAN

      Articles written in Bulletin of Materials Science

    • Impedance analysis of zirconium-doped lithium manganese oxide

      SAM MANOVA VEDHANAYAGAM SHARMILA SAMINATHAN B JANARTHANAN J CHANDRASEKARAN

      More Details Abstract Fulltext PDF

      In recent days, portable electronic devices are indispensable to improve the standard of living, which led to the demand for energy storage devices with good performance. Among the storage devices, rechargeable lithium ion batteries play a vital role due to the good electrical conductivity. In this study, impedance and electrical performance were studied for zirconium-doped Li$_4$Mn$_5$O$_{12}$ at different concentrations (0.1, 0.2, 0.3 and 0.4 mol). The structural andmorphological properties of the material were studied by powder X-ray diffractometer spectra and scanning electron microscopy analysis. Morphological properties exhibit the combination of polyhedral and needle-shaped particles, which were in micron size. The Nyquist plot indicates the absence of grain boundary effect and explained the bulk property, i.e., the negative temperature co-efficient of resistance property of the material. Zirconium-doped lithium manganese oxide (0.2 mol) exhibits good electrical property than other concentrations. Maximum conductivity was ($1.4 \times 10^{-5}$ S cm$^{-1}$)observed at 160$^{\circ}$C for the same. These results suggested that 0.2 mol of zirconium will enhance the electrical property of lithium manganese oxide (Li$_4$Mn$_5$O$_{12}$).

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.