Abstract
In this paper, the application of recycled Li-ion battery spent cathodes (LIB-SC) combined with a NaHCO3/H2O2 system is presented for the first time in the literature as an alternative for the degradation of potentially toxic organic molecules. The model pollutant choice was methylene blue molecule. The spent cathode composition corresponds to LiCoO2, which was proved by the XRD and EDX. Regarding the decolorization of methylene blue solution, the addition of NaHCO3, in comparison with only H2O2, reduces the complete decolorization time by 96%. This reduction occurs because the radical CO 3 . is more stable than OH. In this way, the application of the system proposed in this article is aimed at solving two major global problems: the disposal of cell phone batteries and the pollution of liquid effluents.
Highlights
One of the first papers reporting the Li-ion battery (LIB) is dated 1962 [1]
The characterization of Li-ion battery spent cathodes (LIB-SC) is very important, since composition composition varies with the make, and even with the model [11]
The presence of graphite is justified because its the main phase identified was in the LiCoO2
Summary
One of the first papers reporting the Li-ion battery (LIB) is dated 1962 [1]. Approximately 30 years passed before its introduction to the commercial market by Sony® [2]. In order to give a sense of the dimensions of LIB presence in the market, in 2012, world sales of LIBs were estimated at $12 billion, and this number was more than double that in 2015 ($30 billion) [5]. Another application that has increased is hybrid devices between supercapacitors and Li-ion batteries. In these devices, the batteries’ faradaic processes are combined with the capacitive processes of the supercapacitors, generating a new class of energy source. This new prospect for application is mainly related to the advent of electric vehicles [6,7,8]
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