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      https://www.ias.ac.in/article/fulltext/boms/038/01/0141-0149

    • Keywords

       

      Lithium ion battery; LiMn2O4; cation doping; surface modifications; electrochemical cycling performance.

    • Abstract

       

      Spinel LiMn2O4 and multidoped spinel LiMn1.9Co0.025Cr0.025Ni0.025Fe0.025O4 were synthesized by the glycine-nitrate method and coated with lithium borosilicate (LBS) in order to enhance the electrochemical performance at room temperature. The structure and electrochemical performance of all samples were characterized by inductively coupled plasma-mass spectrometer (ICP-MS), X-ray diffraction (XRD), differential thermal analysis/thermogravimetry (DTA/TG), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), atomic force microscopy (AFM) and galvanostatic charge–discharge measurements. The XRD analysis shows that the samples exhibit a pure spinel phase. The SEM results indicated that LBS particles had encapsulated the surface of the undoped and multidoped LiMn2O4 without causing any structural change. The charge–discharge tests showed that LiMn1.9Co0.025Cr0.025Ni0.025Fe0.025O4 displays better cycling performance than the pristine LiMn2O4 at room temperature. However, in the same conditions, LBS-coated LiMn1.9Co0.025Cr0.025Ni0.025Fe0.025O4 and LiMn2O4 have better cycling performance than uncoated samples. The results suggest that multidoped and LBS-coated LiMn2O4 could develop into a promising cathode material for lithium ion batteries.

    • Author Affiliations

       

      Halil Şahan1 Mehmet Nurullah Ateş2 Fatma Kiliç Dokan1 Ahmet Ülgen1 Şaban Patat1

      1. Department of Chemistry, Faculty of Science, Erciyes University, 38039 Kayseri, Turkey
      2. Northeastern University Center for Renewable Energy Technology, Department of Chemistry and Chemical Biology, 317 Egan Center, 360 Huntington Avenue, Boston, MA 02115, USA
    • Dates

       
  • Bulletin of Materials Science | News

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