High performance of regenerated LiFePO4 from spent cathodes via an in situ coating and heteroatom-doping strategy using amino acids

Wang, Junwei; Ji, Shuaijing; Han, Qigao; Wang, Fengqian; Sha, Wuxin; Cheng, Danpeng; Zhang, Weixin; Tang, Shun; Cao, Yuan-Cheng; Cheng, Shijie

doi:10.1039/d4ta01098a

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta01098a

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High performance of regenerated LiFePO₄ from spent cathodes via an in situ coating and heteroatom-doping strategy using amino acids

Junwei Wang,

Shuaijing Ji,

Qigao Han

et al.

Abstract: Schematic of the regeneration mechanism of spent LiFePO4via a redox process induced by sucrose and amino acids. High-temperature oxidation process transforms structure, eliminates additives, and facilitates nitrogen-doped carbon layer regeneration.

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Interfacial Metal‐Solvent Chelation for Direct Regeneration of LiFePO₄ Cathode Black Mass

Li,

Shi,

Wang

et al. 2024

Advanced Materials

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Direct regeneration of spent lithium‐ion batteries presents a promising approach to effectively reuse valuable resources and benefit the environment. Unlike controlled laboratory conditions that commonly facilitate impurity purification and minimize structural damage, the LiFePO4 cathode black mass faces significant interfacial challenges, including structure deterioration, cathode‐electrolyte interphase residues, and damage from storage procedures, which hinder lithium replenishment and structure regeneration. Here, a metal‐solvent chelation reaction using a lithium acetylacetonate solution is introduced to address these challenges under ambient conditions. This method regulates the near‐surface structure through strong chelation between Acac‒ anions and Fe (III) elements, thus effectively eliminating the degraded amorphous phase and residual fluorine compounds. By direct lithium connection and reducing diffusion barriers, the reconstructed surface facilitates the re‐lithiation process. The regenerated LiFePO4 cathodes demonstrate a capacity retention of 88.5% after 400 cycles at 1 C, while also outperforming traditional recycling methods in terms of environmental and economic benefits. This approach provides a promising solution for regenerating degraded LiFePO4 cathodes from actual dismantled black mass, thereby accelerating the practical application of battery recycling.

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Interfacial Metal‐Solvent Chelation for Direct Regeneration of LiFePO₄ Cathode Black Mass

Li,

Shi,

Wang

et al. 2024

Advanced Materials

View full text Add to dashboard Cite

show abstract

Revealing the lithium ion diffusion kinetics and cycling stability of rare earth doped LiFePO4/C cathodes

Yang,

Hu,

Lin

et al. 2025

Journal of Energy Storage

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Ti3C2T MXene enhanced high-performance LiFePO4 cathode for all-solid-state lithium battery

Xu,

Liu,

et al. 2024

Journal of Materials Science & Technology

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High performance of regenerated LiFePO₄ from spent cathodes via an in situ coating and heteroatom-doping strategy using amino acids

Abstract: Schematic of the regeneration mechanism of spent LiFePO4via a redox process induced by sucrose and amino acids. High-temperature oxidation process transforms structure, eliminates additives, and facilitates nitrogen-doped carbon layer regeneration.

Cited by 5 publications

References 52 publications

Interfacial Metal‐Solvent Chelation for Direct Regeneration of LiFePO₄ Cathode Black Mass

Interfacial Metal‐Solvent Chelation for Direct Regeneration of LiFePO₄ Cathode Black Mass

Revealing the lithium ion diffusion kinetics and cycling stability of rare earth doped LiFePO4/C cathodes

Ti3C2T MXene enhanced high-performance LiFePO4 cathode for all-solid-state lithium battery

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High performance of regenerated LiFePO4 from spent cathodes via an in situ coating and heteroatom-doping strategy using amino acids

Abstract: Schematic of the regeneration mechanism of spent LiFePO4via a redox process induced by sucrose and amino acids. High-temperature oxidation process transforms structure, eliminates additives, and facilitates nitrogen-doped carbon layer regeneration.

Cited by 5 publications

References 52 publications

Interfacial Metal‐Solvent Chelation for Direct Regeneration of LiFePO4 Cathode Black Mass

Interfacial Metal‐Solvent Chelation for Direct Regeneration of LiFePO4 Cathode Black Mass

Revealing the lithium ion diffusion kinetics and cycling stability of rare earth doped LiFePO4/C cathodes

Ti3C2T MXene enhanced high-performance LiFePO4 cathode for all-solid-state lithium battery

Contact Info

Product

Resources

About

High performance of regenerated LiFePO₄ from spent cathodes via an in situ coating and heteroatom-doping strategy using amino acids

Interfacial Metal‐Solvent Chelation for Direct Regeneration of LiFePO₄ Cathode Black Mass

Interfacial Metal‐Solvent Chelation for Direct Regeneration of LiFePO₄ Cathode Black Mass