Recycled Cobalt from Spent Li-ion Batteries as a Superhydrophobic Coating for Corrosion Protection of Plain Carbon Steel

Abstract

A new recycling and film formation scheme is developed for spent Li-ion batteries, which involves the combination of ascorbic-assisted sulfuric leaching and electrodeposition to fabricate a corrosion resistance superhydrophobic coating. The idea behind the simultaneous use of sulfuric and ascorbic is to benefit from the double effect of ascorbic acid, as a leaching reducing agent and as morphological modifier during electrodeposition. Quantum chemical calculations based on the density functional theory are performed to explain the cobalt-ascorbate complexation during the electrocristalization. The optimum parameters for the leaching step are directly utilized in the preparation of an electrolyte for the electrodeposition process, to fabricate a superhydrophobic film with a contact angle of >150° on plain carbon steel. The potentiodynamic polarization measurments in 3.5 wt % NaCl showed that boric-pulsed electrodeposited cobalt film has 20-times lower corrosion current density and higher corrosion potential than those on the non-coated substrate.

Green Recycling Methods to Treat Lithium‐Ion Batteries E‐Waste: A Circular Approach to Sustainability

“…Moreover, by adjusting the electrodeposition parameters, electrodeposited metal properties such as thickness, morphology, and crystal structure can be easily controlled. [120] Therefore, due to their varying physical and chemical properties, electrochemically extracted metals/metal compounds or their mixtures may not only be used as precursors to regenerate LIBs [121] but to generate materials that have a variety of other applications such as electrochemical supercapacitors, [122,123] superhydrophobic coatings, [124] electrochromic compounds, [125] magnetic alloys, [120] etc. (Figure 7).…”

“…[122] Later, Garcia et al proposed the application of recycled Co in interconnects for solid oxide fuel cells (SOFC). [145] Rafsanjani-Abbasi et al [124] developed a new electrochemical Co recycling process fabricating low resistivity superhydrophobic Co coating on a carbon steel surface when using ascorbic acid-assisted H 2 SO 4 leaching system.…”

“…[ 145 ] Rafsanjani‐Abbasi et al. [ 124 ] developed a new electrochemical Co recycling process fabricating low resistivity superhydrophobic Co coating on a carbon steel surface when using ascorbic acid‐assisted H 2 SO 4 leaching system.…”

A Facile Method to Prepare a Superhydrophobic Magnesium Alloy Surface

“…The excellent performance of superhydrophobic surfaces offer potential applications in many fields, such as microfluidic control [ 19 ], corrosion inhibition [ 20 ], nondestructive transportation [ 21 ], drag reduction [ 22 ], and so on. Superhydrophobic technology can be applied on the metal surface to slow down the corrosion rate of the metal surface to a certain extent [ 23 ].…”

Reciclagem de baterias de veículos elétricos: obtenção dos metais a partir de um processo hidrometalúrgico utilizando ácidos orgânicos.

“…Bae et al realizou um processo que separa o lítio do óxido de lítio e cobalto através da passagem do material por uma superfície permeável, em seguida, o lítio é depositado na forma metálica em uma superfície eletrizada e por fim, é transformado em carbonato de lítio para a sua manipulação(Bae et al, 2016;Martins et al, 2021). cátodo da LIBs(Rafsanjani-Abbasi et al, 2018). Falqueto et al lixiviou o cátodo da bateria e em seguida utilizou a solução do lixiviado como eletrólito para fazer uma eletrodeposição.…”