K,Na–Vanadium Oxide Compounds for Lithium-Ion Batteries: Synthesis and Electrochemical Performance in a Redox Reaction with Lithium

Heterogeneous vanadium oxide compounds (bronzes and vanadates) attract designers of lithium-ion batteries due to their superior structural integrity in a redox reaction with lithium compared to V 2 O 5 , a standard intercalation electrode material for lithium-ion batteries. The structural stability...

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Bibliographic Details
Published in:Surface engineering and applied electrochemistry 2021-11, Vol.57 (6), p.644-650
Main Authors: Apostolova, R. D., Shembel’, E. M.
Format: Article
Language:English
Subjects:
Chemical precipitation
Chemical synthesis
Electrochemical analysis
Electrode materials
Engineering
Lithium
Lithium batteries
Lithium-ion batteries
Machines
Manufacturing
Potassium
Precipitates
Processes
Rechargeable batteries
Redox reactions
Sodium
Sodium compounds
Structural integrity
Structural stability
Vanadates
Vanadium compounds
Vanadium oxides
Vanadium pentoxide
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Summary:Heterogeneous vanadium oxide compounds (bronzes and vanadates) attract designers of lithium-ion batteries due to their superior structural integrity in a redox reaction with lithium compared to V 2 O 5 , a standard intercalation electrode material for lithium-ion batteries. The structural stability favors improved discharge behavior of lithium-ion batteries based on potassium- and sodium-containing vanadium oxide compounds. We investigate the effect that the copresence of potassium and sodium ions has on the electrochemical transformation of vanadium oxide compounds in electrodes for rechargeable lithium-ion batteries. Results of X-ray diffraction analysis suggest that dispersed precipitates deposited at the anode depend on the electrolyte composition. The precipitates containing the vanadates Na 5 V 12 O 32 and KV 5 O 13 are formed in potassium metavanadate solutions containing sodium ions, and the vanadates Na 10 V 24 O 64 and KV 5 O 13 are formed in vanadyl sulfate solutions containing potassium and sodium ions. The evaluation of electrochemical behavior of the synthesized material suggests that it has potential for use in lithium-ion batteries. The vanadates prepared in vanadyl sulfate solutions and incorporated in thin-layer matrix-free electrodes of a lithium battery display superior cycling efficiency compared to V 2 O 5 . Implementations of thin-layer lithium batteries based on the Na,K–vanadium oxide compound synthesized in vanadyl sulfate solution may benefit from the positive effect resulting from the copresence of potassium and sodium.
ISSN:1068-3755
1934-8002
DOI:10.3103/S1068375521060028