NDLI: Investigation on LiCoPO4 powders as cathode materials annealed under different atmospheres

Content Provider	Springer Nature Link
Author	Dimesso, Lucangelo Jacke, Susanne Spanheimer, Christina Jaegermann, Wolfram
Copyright Year	2011
Abstract	An uncomplicated Pechini-assisted sol–gel process in aqueous solutions is used for the synthesis of Li–Co phosphate powders as cathode materials. The powders are annealed under different conditions in flowing nitrogen and in flowing air. The structural, morphological, and electrochemical properties are strongly dependent upon the annealing conditions. After the treatment in air, the X-ray diffraction (XRD) patterns reveal the presence of LiCoPO4 as a single phase. The morphology of the powders consists of a homogeneous and good interconnected blend of grains with different sizes; the cyclic voltammetry (CV) curves show a very good reversibility with very close values of the mean peak maxima in the cathodic region. The electrochemical measurements deliver a discharge specific capacity of 37 mAhg−1 at a discharge rate of C/25 at room temperature. After annealing in nitrogen, the XRD analysis detects the formation of Li4P2O7 and to Co2P as secondary phases; the morphological investigation indicated that the LiCoPO4 particles took shape of prisms with an average size of 2 μm. The CV curves are associated with a large polarization and poor irreversibility. The electrochemical measurements deliver a discharge specific capacity of 42 mAh g−1 at a discharge rate of C/25 at room temperature and lower capacity fade (approx. 35%).
Starting Page	911
Ending Page	919
Page Count	9
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	16
Issue Number	3
e-ISSN	14330768
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-06-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sol–gel Cathode materials Lithium cobalt phosphate Annealing Nitrogen Air Electrochemistry Characterization and Evaluation of Materials Energy Storage Analytical Chemistry Physical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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