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Vol. 4, No. 2 (Spring 2018) 27-31   

Link: http://www.acerp.ir/Vol4/No2/4.pdf
 
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  Binder-free copper hexacyanoferrate electrode prepared by pulse galvanostatic electrochemical deposition for aqueous-based Al-ion batteries
 
P. Parvizi and M. Kazazi*
 
( Received: December 23, 2018 – Accepted in Revised Form: March 12, 2019 )
 
 

Abstract    Copper hexacyanoferrate (CuHCF) nanoparticles with tunnel-like Prussian blue structure were deposited on graphite substrate via pulse galvanostatic electrochemical deposition at 25 mA cm-2 with both on-time and off-time periods of 0.1 s, which presented the ability to intercalation/de-intercalation of Al ions reversibly in aqueous solution. The crystal structure of the as-prepared CuHCF film was characterized by X-ray diffraction (XRD) analysis. The surface morphology of the film was examined by a field-emission scanning electron microscope (FESEM). Moreover, the electrochemical energy storage performance of the prepared binder-free electrode was examined by cyclic voltammetry and galvanostatic charge-discharge measurements at various rates in aqueous aluminum sulfate electrolyte. CuHCF was verified to be a promising cathode material for aqueous Al-ion batteries. The prepared CuHCF electrode exhibited a high specific capacity of 77.7 mAh g-1 at a current density of 50 mA g-1 and a good rate capability with 67.1% capacitance retention rate at a high current density of 400 mA g-1.

 

Keywords    Electrochemical deposition, Copper hexacyanoferrate, Al-ion batteries, Aqueous electrolyte, Cathode

 

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