Cathodes of spent Li-ion batteries: Dissolution with phosphoric acid and recovery of lithium and cobalt from leach liquors

By E. Pinna, M. C. Ruiz, M. Ojeda, M. Rodríguez. 2017

254 citations recorded by the source corpus.

Abstract This paper presents the study of an innovative process: the reductive dissolution of mixed lithium cobalt oxide contained in the cathodes of spent Li-ion batteries with phosphoric acid. The studied parameters were: reaction time, temperature, stirring speed, solid-liquid ratio and concentrations of the leaching agent (H3PO4) and the reducing agent (H2O2). Reactants and products were characterized by atomic absorption spectroscopy (AAS), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that the reducing dissolution process with phosphoric acid is an efficient way for the extraction of lithium and cobalt, achieving dissolution values close to 100%. In addition, a recovery of 88% of Li + as Li3PO4 and 99% of Co+ 2 as CoC2O4, with purities of 98.3% and 97.8% was found respectively.

Subfields: Electrical and Electronic Engineering, Industrial and Manufacturing Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/8d88101beeb4dfa653fc9f054088834489d062ab

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In Electrical and Electronic Engineering

1. Feng Wu
2. Renjie Chen
3. Li Li
4. Gholamreza Karimi
5. S. Zandevakili
6. M. Goodarzi
7. E. Asadi Dalini
8. Jun Lu

In Industrial and Manufacturing Engineering

1. Renjie Chen
2. Li Li
3. Hongbin Cao
4. S. Zandevakili
5. M. Goodarzi
6. E. Asadi Dalini
7. Gholamreza Karimi
8. Xiaoxiao Zhang

In Mechanical Engineering

1. Renjie Chen
2. Li Li
3. S. Zandevakili
4. M. Goodarzi
5. E. Asadi Dalini
6. Gholamreza Karimi
7. Hongbin Cao
8. Feng Wu

Citations in the corpus

• A Comprehensive Review of Li-Ion Battery Materials and Their Recycling Techniques (2020, background): “Also, H3PO4, a mild mineral acid, has not been shown to dissociate and divide at the same time [279].”
• A Review on Environmental, Economic and Hydrometallurgical Processes of Recycling Spent Lithium-ion Batteries (2020, methodology): “2Co2þ þ O2 þ 2Liþ þ 4H2O (5) To leach cathodic materials, Pinna et al. (Pinna et al. 2017) used phosphoric acid and hydrogen peroxide as leaching agents.”
• A Mini-Review on Metal Recycling from Spent Lithium Ion Batteries (2018, background): “The inorganic acids hydrochloric acid (HCl) [14,48–50], H2SO4 [11,28,29,31,51], nitric acid (HNO3) [52], and phosphoric acid (H3PO4) [53,54] are usually used as leaching agents to leach metals from spent LIBs.”
• The Recycling of Spent Lithium-Ion Batteries: a Review of Current Processes and Technologies (2018, background): “Here, Fenton’s reagent has been shown to be effective in the assistance of flotation separation, in which under an optimal condition of a Fe2+/H2O2 ratio of 1:120 and a solid-to-liquid (S/L) ratio of 75:1, most organic layers can be removed (Fig.”