Regenerated LiFePO4/C for scrapped lithium iron phosphate powder batteries by pre-oxidation and reduction method

Zhang, Hao; Wang, Lihua; Chen, Yongzhi; Xu, Wen

doi:10.1007/s11581-022-04458-x

Cited by 11 publications

(7 citation statements)

References 21 publications

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“…The excellent electrochemical behavior of LFP/C-700 was mainly attributed to the following reasons. On the one hand, the uniformly coated carbon layer on the surface of regenerated LiFePO 4 reduces the structural defects on the surface and improves the electrical conductivity . On the other hand, the flocculent carbon network between the prepared LiFePO 4 particles forms channels, further improving the electrical conductivity.…”

Section: Resultsmentioning

confidence: 99%

“…On the one hand, the uniformly coated carbon layer on the surface of regenerated LiFePO 4 reduces the structural defects on the surface and improves the electrical conductivity. 46 On the other hand, the flocculent carbon network between the prepared LiFePO 4 particles forms channels, further improving the electrical conductivity. Furthermore, as the calcination temperature increases, the particle size of the particles gradually decreases, which enhances the diffusivity of lithium ions.…”

Section: Regeneration Of Lifepo 4 By Fepo 4 As the Fe Sourcementioning

confidence: 99%

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Green Phosphate Route of Regeneration of LiFePO₄ Composite Materials from Spent Lithium-Ion Batteries

Wang

et al. 2023

Ind. Eng. Chem. Res.

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To develop efficient, viable, and promising routes to regenerate nano-LiFePO4 (nano-LFP) composite materials from spent LFP batteries, this paper studied phosphate approaches by taking Li3PO4 and FePO4 as raw materials. The crystalline structure, morphology, and physicochemical properties of regenerated LiFePO4 nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and electrochemical measurement. Regenerated LiFePO4 owned a good olivine structure with a space group of Pnma. After being coated with carbon, rectangular-structured LiFePO4 prepared by hydrothermal synthesis exhibited high specific capacity, excellent rate capability, and good Li+ diffusivity. When the pH value was around 8.0 and the amount of the Li3PO4 raw material was 14 mmol, the discharge capacity at 0.1C was 158.6 mAh g–1 and the capacity retention rate was 99.19% at 1C after 300 cycles. Meanwhile, flake-like LiFePO4/C synthesized by the carbothermal method at 700 °C and a 14 wt % carbon mass fraction showed an initial discharge capacity of 159.0 mAh g–1 at 0.1C and a capacity retention rate of 97.45% after 300 cycles at 1C, exhibiting excellent electrochemical performance. Overall, this study provides a facile, feasible, and sustainable recovery method for the battery industry for recovering phosphate products from spent LFP cathode materials and subsequent large-scale regeneration of LiFePO4 composite materials.

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Section: Resultsmentioning

confidence: 99%

Section: Regeneration Of Lifepo 4 By Fepo 4 As the Fe Sourcementioning

confidence: 99%

Green Phosphate Route of Regeneration of LiFePO₄ Composite Materials from Spent Lithium-Ion Batteries

Wang

et al. 2023

Ind. Eng. Chem. Res.

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“…The small size of LiFePO 4 particles and their high specific surface area is a result of design optimization, as this is favorable for the performance of batteries . This is in the range of sizes mentioned in the literature for application in LIBs − and also in the range of sizes reported for some other cathode materials . Additionally, two types of graphite particles were selected.…”

Section: Methodsmentioning

confidence: 99%

Sorting Lithium-Ion Battery Electrode Materials Using Dielectrophoresis

et al. 2023

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Lithium-ion batteries (LIBs) are common in everyday life and the demand for their raw materials is increasing. Additionally, spent LIBs should be recycled to achieve a circular economy and supply resources for new LIBs or other products. Especially the recycling of the active material of the electrodes is the focus of current research. Existing approaches for recycling (e.g., pyro-, hydrometallurgy, or flotation) still have their drawbacks, such as the loss of materials, generation of waste, or lack of selectivity. In this study, we test the behavior of commercially available LiFePO4 and two types of graphite microparticles in a dielectrophoretic high-throughput filter. Dielectrophoresis is a volume-dependent electrokinetic force that is commonly used in microfluidics but recently also for applications that focus on enhanced throughput. In our study, graphite particles show significantly higher trapping than LiFePO4 particles. The results indicate that nearly pure fractions of LiFePO4 can be obtained with this technique from a mixture with graphite.

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“…11,12 At present, there are two main recycling methods for black powder separated from retired LiFePO 4 batteries. [13][14][15] One is direct regeneration through physical repair, and the other is lithium extraction through metallurgy. 16,17 Direct regeneration typically involves supplementing lost lithium and repairing the possible structural damage of LiFePO 4 black powder.…”

Section: Introductionmentioning

confidence: 99%

Green and efficient method for the realization of full-component recovery of LiFePO₄ black powder

Gao,

Sun,

Peng

et al. 2024

Green Chem.

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Regenerated LiFePO4/C for scrapped lithium iron phosphate powder batteries by pre-oxidation and reduction method

Cited by 11 publications

References 21 publications

Green Phosphate Route of Regeneration of LiFePO₄ Composite Materials from Spent Lithium-Ion Batteries

Green Phosphate Route of Regeneration of LiFePO₄ Composite Materials from Spent Lithium-Ion Batteries

Sorting Lithium-Ion Battery Electrode Materials Using Dielectrophoresis

Green and efficient method for the realization of full-component recovery of LiFePO₄ black powder

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Regenerated LiFePO4/C for scrapped lithium iron phosphate powder batteries by pre-oxidation and reduction method

Cited by 11 publications

References 21 publications

Green Phosphate Route of Regeneration of LiFePO4 Composite Materials from Spent Lithium-Ion Batteries

Green Phosphate Route of Regeneration of LiFePO4 Composite Materials from Spent Lithium-Ion Batteries

Sorting Lithium-Ion Battery Electrode Materials Using Dielectrophoresis

Green and efficient method for the realization of full-component recovery of LiFePO4 black powder

Contact Info

Product

Resources

About

Green Phosphate Route of Regeneration of LiFePO₄ Composite Materials from Spent Lithium-Ion Batteries

Green Phosphate Route of Regeneration of LiFePO₄ Composite Materials from Spent Lithium-Ion Batteries

Green and efficient method for the realization of full-component recovery of LiFePO₄ black powder