Authors: P Sivakumar Prasant Kumar Nayak Judith Grinblat Nina Perkas Boris Markovsky Doron Aurbach Aharon Gedanken
Publish Date: 2016/03/17
Volume: 20, Issue: 6, Pages: 1683-1695
Abstract
Li and Mnrich layered Li12Ni013Co013Mn054O2 cathode material was synthesized using sonochemical method followed by annealing at 700 800 and 900 °C for 10 h The material was characterized by Xray diffraction XRD scanning electron microscope SEM transmission electron microscopy TEM Raman spectroscopy and electrochemical techniques Its performance as a cathode material for Liion batteries was examined With the sample annealed at 900 °C an initial specific capacity of 240 mAh g−1 was obtained which decreased to 215 mAh g−1 after 80 cycles thus retaining about 90 of its initial capacity In contrast samples annealed at lower temperatures exhibited lower capacity retention upon cycling Thus the final annealing temperature was found to have a significant effect on the electrochemical stability of this material in terms of capacity average voltage and rate capability The advantage of this synthesis which includes a sonochemical stage compared with a conventional coprecipitation synthesis was also confirmedP Sivakumar thanks the Council for Higher Education the State of Israel for the PBC scholarship for outstanding postdoctoral researchers from China and India This work was partially supported by the Israel Science FoundationISF as part of the INREP project
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