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      https://www.ias.ac.in/article/fulltext/boms/044/0243

    • Keywords

       

      Spinel; carbon composite; purity; conductivity; robust electrical performance.

    • Abstract

       

      The need for large-scale batteries impels the development of high-performance cathode material for advanced lithium-ion batteries (LIBs). The existing cathode materials such as LiCoO$_2$, LiNiO$_2$ and LiMnO$_2$ were rated as potentially viable cathodes for commercial applications. Among these, LiMn$_2$O$_4$ and its composites was considered a sound cathode material for high-performance LIBs. In this study, the multi-walled carbon nanotube (MWCNT)-wrapped spinel LiMn$_2$O$_4$ nanocathode was synthesized via simple sol–gel method and characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), Raman, Impedance and galvanostatic charge/discharge analyses to study their structural, morphological, optical and electrochemical properties, respectively. XRD results reveal that the pure and MWCNT-embedded LiMn$_2$O$_4$ nanocathode exhibited similar cubic structure with space group of Fd3m. The as-fabricated MWCNT/LiMn$_2$O$_4$ battery showed the excellent reversible capacity (114 mAh g$^{–1}$) with higher coulombic efficiency after multiple cycles. Herein, simple wrapping methodology was adopted to overcome the drawbacks of the pure spinel. Incorporated MWCNT uniformly entwined in the LiMn$_2$O$_4$ and lead to prevent the volume expansion, and pulverization in surface of the active LiMn$_2$O$_4$ particles, which confirmed from post FESEM analysis and their results are discussed. Interestingly, MWCNT addition showed that the enriched electrochemical properties in LiMn$_2$O$_4$ nanoparticles are able to hold as a potential cathode for high voltage LIBs.

    • Author Affiliations

       

      P PERUMAL1 K P ABHILASH2 P CHRISTOPHER SELVIN1 ZDENEK SOFER2

      1. Luminescence and Solid State Ionics Laboratory, Department of Physics, Bharathiar University, Coimbatore 641046, India
      2. Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 166 26 Prague 6, Czech Republic
    • Dates

       
  • Bulletin of Materials Science | News

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