Efficient Extraction of Lithium from Anode for Direct Regeneration of Cathode Materials of Spent Li-Ion Batteries,ACS Energy Letters

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Efficient Extraction of Lithium from Anode for Direct Regeneration of Cathode Materials of Spent Li-Ion Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2022-08-03 , DOI: 10.1021/acsenergylett.2c01539
Junxiong Wang _{1,

2} , Jun Ma ₁ , Kai Jia ₂ , Zheng Liang ₂ , Guanjun Ji ₂ , Yun Zhao ₁ , Baohua Li ₁ , Guangmin Zhou ₁ , Hui-Ming Cheng _{3,

4}

Affiliation

The recycling of lithium-ion batteries is important due to limited metallic resources and environmental protection. However, most current studies aim at only extracting valuable components from cathode materials, and the lithium in the anode is usually ignored due to its low concentration. Herein, we develop an integrated recycling strategy for both cathode and anode materials. Batteries are disassembled, and lithium in lithiated graphite is extracted in water and converted to Li₂CO₃ after absorbing CO₂ from the air, which is then used for the direct regeneration of LiCoO₂ and LiNi_0.5Mn_0.3Co_0.2O₂, while the degraded graphite is regenerated by the delithiation and activation. LiCoO₂ with different degrees of failure can retrieve a capacity of 130 mAh/g, while degraded graphite can realize a capacity of 370 mAh/g after regeneration, values which are comparable to commercial materials. Importantly, no external lithium salt is necessary, and water is the only reagent used during regeneration of the cathode material.

中文翻译：

阳极高效提锂直接再生废锂离子电池阴极材料

由于金属资源有限和环境保护，锂离子电池的回收利用非常重要。然而，目前大多数研究仅针对从正极材料中提取有价值的成分，而负极中的锂由于浓度低而通常被忽略。在此，我们制定了正极和负极材料的综合回收策略。将电池拆解，将锂化石墨中的锂提取到水中，吸收空气中的CO _{2后转化为Li}₂ CO ₃，用于LiCoO ₂和LiNi _0.5 Mn _0.3 Co _0.2 O _{2的直接再生}，而降解的石墨通过脱锂和活化再生。不同失效程度的LiCoO ₂可恢复130 mAh/g的容量，而降解石墨再生后可实现370 mAh/g的容量，与商业材料相当。重要的是，不需要外部锂盐，并且水是阴极材料再生过程中使用的唯一试剂。

更新日期：2022-08-03

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