Li3MxV22x(PO4)3/C (M=Fe, Co) composite cathodes with extended solubility limit and improved electrochemical behavior
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Li3MxV22x(PO4)3/C (M=Fe, Co) composite cathodes with extended solubility limit and improved electrochemical behavior
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| Creator |
Nathiya, K.
Bhuvaneswari, D. Gangulibabu, . Nirmala, D. Kalaiselvi, N. |
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| Subject |
Lithium batteries
Electrochemical Power Sources |
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| Description |
A first attempt has been made to prepare Li3MxV22x(PO4)3/C (M=Fe, Co) composite solutions by
adopting a novel oxalic dihyrazide assisted combustion (ODHAC) method. The pillaring effect of Fe
in Li3FexV22x(PO4)3/C and the possible electrochemical activity of the Co3+/4+ redox couple of
Li3CoxV22x(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
Li3MxV22x(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
Li3FexV22x(PO4)3/C compounds. The study demonstrates the suitability of the ODHAC synthesis
approach in preparing a wide variety of phase pure Li3MxV22x(PO4)3/C cathodes. Further, the
superiority of Li3Co0.10V1.90(PO4)3/C in exhibiting the highest capacity (178 mAh g21) 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
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| Publisher |
The Royal Society of Chemistry
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| Date |
2012
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3108/1/058-2012.pdf
Nathiya, K. and Bhuvaneswari, D. and Gangulibabu, . and Nirmala, D. and Kalaiselvi, N. (2012) Li3MxV22x(PO4)3/C (M=Fe, Co) composite cathodes with extended solubility limit and improved electrochemical behavior. RSC Advances, 2. pp. 6885-6889. ISSN ESSN 2046-2069 |
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| Relation |
http://www.rsc.org/advances
http://cecri.csircentral.net/3108/ |
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