Jump to main content
Jump to site search

Issue 17, 2012
Previous Article Next Article

Li3MxV2−x(PO4)3/C (M=Fe, Co) composite cathodes with extended solubility limit and improved electrochemical behavior

Author affiliations

Abstract

A first attempt has been made to prepare Li3MxV2−x(PO4)3/C (M=Fe, Co) composite solutions by adopting a novel oxalic dihyrazide assisted combustion (ODHAC) method. The pillaring effect of Fe in Li3FexV2−x(PO4)3/C and the possible electrochemical activity of the Co3+/4+ redox couple of Li3CoxV2−x(PO4)3/C at a 4.8 V limit increases the structural and cycling stability of the native Li3V2(PO4)3/C cathode respectively, thereby ultimately improving the electrochemical behaviour of Li3MxV2−x(PO4)3/C solid solutions. An extended solubility limit of x = 0.10 for Fe dopant has been achieved for the first time through the present study against the reported value of x = 0.05 in Li3FexV2−x(PO4)3/C compounds. The study demonstrates the suitability of the ODHAC synthesis approach in preparing a wide variety of phase pure Li3MxV2−x(PO4)3/C cathodes. Further, the superiority of Li3Co0.10V1.90(PO4)3/C in exhibiting the highest capacity (178 mAh g−1) and negligible fade (4%) and the demonstrated cyclability under the influence of 10 C rate has been understood as a function of the synergistic effect of the ODHAC synthesis method and the optimum concentration of Co dopant chosen for the study.

Graphical abstract: Li3MxV2−x(PO4)3/C (M=Fe, Co) composite cathodes with extended solubility limit and improved electrochemical behavior

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 21 May 2012, accepted on 21 May 2012 and first published on 13 Jun 2012


Article type: Paper
DOI: 10.1039/C2RA20998E
Citation: RSC Adv., 2012,2, 6885-6889
  •   Request permissions

    Li3MxV2−x(PO4)3/C (M=Fe, Co) composite cathodes with extended solubility limit and improved electrochemical behavior

    K. Nathiya, D. Bhuvaneswari, Gangulibabu, D. Nirmala and N. Kalaiselvi, RSC Adv., 2012, 2, 6885
    DOI: 10.1039/C2RA20998E

Search articles by author