废旧锂离子电池正极材料结构修复技术的环境和经济评估

林娇; 吴嘉伟; 范二莎; 张晓东; 陈人杰; 吴锋; 李丽

doi:10.1007/s12613-022-2430-7

Volume 29 Issue 5

Apr. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(5): 942-952

Jiao Lin, Jiawei Wu, Ersha Fan, Xiaodong Zhang, Renjie Chen, Feng Wu, and Li Li, Environmental and economic assessment of structural repair technologies for spent lithium-ion battery cathode materials, Int. J. Miner. Metall. Mater., 29(2022), No. 5, pp. 942-952. https://doi.org/10.1007/s12613-022-2430-7

Cite this article as:

Jiao Lin, Jiawei Wu, Ersha Fan, Xiaodong Zhang, Renjie Chen, Feng Wu, and Li Li, Environmental and economic assessment of structural repair technologies for spent lithium-ion battery cathode materials, Int. J. Miner. Metall. Mater., 29(2022), No. 5, pp. 942-952. https://doi.org/10.1007/s12613-022-2430-7

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研究论文

废旧锂离子电池正极材料结构修复技术的环境和经济评估

1)
北京理工大学材料科学与工程学院环境科学与工程北京市重点实验室，北京 100081，中国
2)
广东省电池安全重点实验室，广州能源测试研究所，广州 511447，中国
3)
北京电动汽车协同创新中心，北京 100081，中国
4)
北京理工大学前沿技术研究院，济南 250300，中国

通讯作者:
陈人杰 E-mail: chenrj@bit.edu.cn

李丽 E-mail: lily863@bit.edu.cn

文章亮点

(1) 系统研究了不同锂添加量对再生钴酸锂材料的宏观和微观影响。

(2) 研究了再生材料的电化学性能及充放电机制。

(3) 深入评估了固相烧结工艺、湿法冶金回收技术和火法冶金回收技术的经济性和环境友好性。

中文摘要

现有再生回收技术存在对健康状态较差的锂离子电池正极材料再生效果差、产品附加值低等问题。在这项工作中，提出了一种针对性的补锂修复技术，以提高再生钴酸锂正极材料的放电容量和循环稳定性。结果表明，不同锂添加量对再生钴酸锂材料有明显影响，再生钴酸锂正极的锂/钴摩尔比均大于0.9，完全消除了失效材料中由于Li_xCoO₂分解而形成的Co₃O₄杂相。与商业LiCoO₂材料相比，修复材料在1 C（1 C = 150 mA·g⁻¹）和10 C下都表现出更好的循环稳定性、更低的电化学阻抗和更快的Li⁺扩散速率。Li_1.05CoO₂正极具有更高的Li补充效率和循环稳定性。与火法和湿法回收工艺相比，固相烧结修复工艺的能耗和温室气体排放明显减少。

关键词:

Research Article

Environmental and economic assessment of structural repair technologies for spent lithium-ion battery cathode materials

+ Author Affiliations

1)
Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
2)
Guangdong Key Laboratory of Battery Safety, Guangzhou Institute of Energy Testing, Guangzhou 511447, China
3)
Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100081, China
4)
Advanced Technology Research Institute, Beijing Institute of Technology, Jinan 250300, China

Corresponding authors:
Renjie Chen E-mail: chenrj@bit.edu.cn

Li Li E-mail: lily863@bit.edu.cn
Received: 10 January 2021; Revised: 27 January 2022; Accepted: 28 January 2022; Available online: 29 January 2022

Abstract

Abstract

The existing recycling and regeneration technologies have problems, such as poor regeneration effect and low added value of products for lithium (Li)-ion battery cathode materials with a low state of health. In this work, a targeted Li replenishment repair technology is proposed to improve the discharge-specific capacity and cycling stability of the repaired LiCoO₂ cathode materials. Compared with the spent cathode material with >50% Li deficiency, the Li/Co molar ratio of the regenerated LiCoO₂ cathode is >0.9, which completely removes the Co₃O₄ impurity phase formed by the decomposition of Li_xCoO₂ in the failed cathode material after repair. The repaired LiCoO₂ cathode materials exhibit better cycling stability, lower electrochemical impedance, and faster Li⁺ diffusion than the commercial materials at both 1 and 10 C. Meanwhile, Li_1.05CoO₂ cathodes have higher Li replenishment efficiency and cycling stability. The energy consumption and greenhouse gas emissions of LiCoO₂ cathodes produced by this repair method are significantly reduced compared to those using pyrometallurgical and hydrometallurgical recycling processes.
- spent lithium-ion batteries;
- structural repair;
- solid-phase sintering process;
- environmental and economic assessment

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废旧锂离子电池正极材料结构修复技术的环境和经济评估

文章亮点

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Environmental and economic assessment of structural repair technologies for spent lithium-ion battery cathode materials

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