Volume 9, Issue 7 2401975
Research Article

Battery Cathode Recycling With Superior Dissolution Kinetics by Laser Augmentation

Zixu Wang

Zixu Wang

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Xin Hu

Xin Hu

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Hao Zhang

Hao Zhang

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Yaduo Song

Yaduo Song

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Yonggang Yao

Corresponding Author

Yonggang Yao

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

E-mail: [email protected]; [email protected]

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Yunhui Huang

Corresponding Author

Yunhui Huang

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

E-mail: [email protected]; [email protected]

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First published: 16 February 2025

Abstract

The application of lithium-ion batteries challenges environmental sustainability and calls for efficient recycling toward circular economics. Hydrometallurgical recycling, despite being commercialized, still faces challenges such as harsh chemicals, high secondary waste generation, and low efficiencies. Intuitively, higher temperature leads to exponentially higher reaction kinetics (following Arrhenius's law), yet the dissolution temperature is limited to below 100 °C while heating the solution means more energy consumption. This study presents a laser-assisted wet leaching (Laser-WL) method that enables decoupled particle/solution temperatures, where the cathode particles are effectively heated by laser adsorption (30 W) to accelerate the dissolution kinetics (7–10 fold) while the solution remains cool for energy saving. Besides, physical laser ablation helps remove the robust solid electrolyte interface and cracks the particles to expose active materials, shortening the diffusion pathways and further enhancing the leaching kinetics. Therefore, Laser-WL can achieve an extraction rate of 95.6% in 15 min (traditional method >3 h). It reduced the consumption of concentrated HCl by 87%, and water consumption by 27%. The method is applicable to various cathode materials and works for weak acids, thus presenting a sustainable and economically viable solution for metal recycling.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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