Synthesis, Characterization and Electrochemical Analysis of FeNbO4 Phase with α-PbO2 Structure

The Nanometer and micrometer sized samples of FeNbO 4 were prepared by sol-gel polymeric precursor and solid state reaction methods. Electrochemical lithium insertion was performed into both samples. Structural changes during the lithium insertion were followed by ex-situ XRD. The electrochemical ch...

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Bibliographic Details
Published inRussian journal of electrochemistry Vol. 55; no. 3; pp. 168 - 174
Main Author Saritha, D.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.03.2019
Springer Nature B.V
Subjects
Chemistry
Chemistry and Materials Science
Discharge
Electrochemical analysis
Electrochemistry
Insertion
Lead oxides
Lithium
Physical Chemistry
Prepolymers
Sol-gel processes
sol-gel synthesis
electrode material
FeNbO
lithium insertion
charge-discharge studies
XRD
electrochemical studies
capacity
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Summary:The Nanometer and micrometer sized samples of FeNbO 4 were prepared by sol-gel polymeric precursor and solid state reaction methods. Electrochemical lithium insertion was performed into both samples. Structural changes during the lithium insertion were followed by ex-situ XRD. The electrochemical charge discharge curves shows insertion of 0.3 Li is obtained in micrometer sized samples when discharged to 1.0 V and extraction of 0.1 Li is observed during charge. On the other hand, in the nano structured sample, insertion of 3Li/FeNbO 4 were observed and during the first discharge, 2.2Li is extracted when charged to 3 V. A reversible capacity of 120 mA h/g is observed after 20 cycles.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193519020071