Surface analysis of cobalt-enriched crushed products of spent lithium-ion batteries by X-ray photoelectron spectroscopy
Surface analysis of cobalt-enriched crushed products of spent lithium-ion batteries by X-ray photoelectron spectroscopy
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X射线光电子能谱法对废旧锂离子电池富钴破碎物进行表面分析
DOI：
10.1016/j.seppur.2014.09.033
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发表时间：
2014-12
影响因子：
8.6
通讯作者：
Caibin Wu
中科院分区：
文献类型：
--
作者：
Fangfang Wang;Hong Li;Chenlong Duan;Caibin Wu
本文利用X射线光电子能谱对废旧锂离子电池粉碎物进行了详细的表面分析。结果表明，虽然LiCoO2是细碎产物的主要成分，但钴的表面原子丰度只有1.69%，而有机物的表面原子丰度超过75%。LiPF6在粉碎过程中分解，产生HF、POF3等有害有毒物质，有必要采取适当措施，避免废LiBS粉碎过程中的二次污染。金属钴、铜、铝被氟化和氧化，有机化合物也被氧化和分解。对细小颗粒的表面组成和微观结构进行了分析，结果表明，粉碎产物中的细小颗粒为锂钴氧化物和包覆有机化合物的石墨芯。浮选试验指出，如果去除外层，浮选选择性将大大提高：富集率可从1.16提高到3.24。在表面分析的基础上，提出了去除外层的可能途径。
In this work, detailed surface analysis on the fine crushed products of spent lithium-ion batteries is investigated by X-ray photoelectron spectroscopy. The results showed that although LiCoO2was a main composition of the fine crushed products, the surface atomic abundance of cobalt was only 1.69%, but the surface atomic abundance of organic compounds was more than 75%. During the crushing process, LiPF6decomposed and harmful and toxic substances such as HF, POF3were generated, it is necessary to take appropriate measures to avoid the secondary pollution in the crushing process of spent LiBs. Metallics such as Co, Cu, and Al were fluoridated and oxidized, and the organic compounds were oxidized and decomposed, too. The surface composition and microstructure of the fine particles were presented, which showed that the fine particles in the crushed products were lithium cobalt oxides and graphite cores coated inside by organic compounds. Flotation test pointed out that if the outer layer was removed, the flotation selectivity would be greatly improved: the enrichment ratio could be increased from 1.16 up to 3.24. Based on the surface analysis, potential ways for removal of the outer layer were proposed.
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影响因子：
11.4
作者：
Xin, Baoping;Zhang, Di;Li, Li
通讯作者：
Li, Li
影响因子：
8.1
作者：
Zhang Tao;Yaqun He;Fangfang Wang;Linhan Ge;Xiang-nan Zhu;Hong Li
通讯作者：
Zhang Tao;Yaqun He;Fangfang Wang;Linhan Ge;Xiang-nan Zhu;Hong Li
DOI：
--
发表时间：
1995-02
期刊：
--
影响因子：
--
作者：
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通讯作者：
J. Moulder;J. Chastain;R. C. King
影响因子：
13.6
作者：
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通讯作者：
Qiu, Keqiang
影响因子：
5.2
作者：
Qiwu Zhang;Jinfeng Lu;F. Saito;C. Nagata;Yuichi Ito
通讯作者：
Qiwu Zhang;Jinfeng Lu;F. Saito;C. Nagata;Yuichi Ito