Authors: M B J G Freitas E M Garcia V G Celante
Publish Date: 2008/11/01
Volume: 39, Issue: 5, Pages: 601-607
Abstract
In this work cobalt from spent Liion batteries of cellular phones was recycled using electrochemical techniques The efficiency structure and morphology of deposits were influenced by the pH solution and charge density Maximum efficiency is obtained for pH = 540 for all charge densities analyzed The presence of the cobalt hcp phase for both pH solutions 540 and 270 and charge density conditions 100 and 500 C cm−2 used in the electrodeposition process was detected by Xray diffraction The growth of the cobalt deposit is favored in the crystallographic direction 002 for pH = 540 and in the direction 110 for pH = 270 when the charge density is 100 C cm−2 The 100 and 101 crystallographic directions of hcp phase were detected by Xray diffractogram for both pH conditions when the charge density was increased to 500 C cm−2 The potentiodynamic dissolution of the cobalt depends on its structural composition
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