Chemical characterisation of spent rechargeable batteries

Hydrometallurgical route to recover nickel, cobalt and cadmium from spent Ni–Cd batteries

“…Table 1 presents the concentrations of the elements in the leachates. Data agree with literature data [4,37,38], except for iron, which is present in lower amounts.…”

Chemical and electrochemical recycling of the nickel, cobalt, zinc and manganese from the positives electrodes of spent Ni–MH batteries from mobile phones

“…3 shows the XRD results for the NieMH cathode material. The diffractogram shows peaks that, when compared with those reported in the JCPDS database, correspond to b-Ni(OH) 2 are additives that stabilize the a-Ni(OH) 2 phase and improve the capacity of the electrodes, respectively. a-Ni(OH) 2 became bNi(OH) 2 during the charge-and-discharge cycling [23,24].…”

“…Co / Co 2þ þ 2e (2) ii. In anodic peak II (figure B), the hydrogen ions desorb, which causes an increase in acidity at the metalesolution interface, as described in equation (3):…”

Monosegmented Flow Analysis Exploiting Aqueous Two-phase Systems for the Determination of Cobalt

“…Cobalt concentrations within the range of Table 5 The analysis of variance for the results obtained using CCD 5.00 to 500 μmol kg -1 gave linear responses (R = 0.9998, n = 13), which shows the suitability of this method for the determination of cobalt in Ni-Cd batteries, given that the content commonly found by leaching analysis was approximately 7.88 mmol kg -1 and dependent on the battery brand. 5,33 This method has great potential due to the ability of ATPS to concentrate the analyte into a small volume of phase and because, the ATPS-MSFA method gives excellent limits of detection and quantification, 2.17 and 7.24 μmol kg -1 , respectively, which are lower than the amount of cobalt present in Ni-Cd batteries. 5 Moreover, the coefficient of variation (CV) obtained for 30.0 μmol kg -1 of Co(II) (n = 7) was 1.14%.…”