Analysis of Composition of Lithium Ion Battery Used in PC
Analysis of Composition of Lithium Ion Battery Used in PC
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PC用锂离子电池的成分分析
DOI：
10.2320/jinstmet.74.677
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发表时间：
2010
影响因子：
--
通讯作者：
J. Shibata
中科院分区：
文献类型：
--
作者：
Y. Omura;H. Kawai;N. Murayama;J. Shibata
对废旧PC用圆柱形锂离子电池的化学成分进行了分析，并通过真空燃烧、破碎、筛选等方法对锂离子电池中各金属（Li、Co、Ni、Cu）的分离进行了研究，以期从锂离子电池中回收稀有金属。圆柱形锂离子电池的结构是将多层电极与由阳极、阴极和两个隔板组成的四层箔圆柱状包裹在核心钢棒周围。锂离子电池中主要存在Li、Co、Ni、Fe、Mn、Al、Cu 7种金属。本研究使用的锂离子电池总质量为39.7 g。一块锂离子电池中Li、Co、Ni和Cu的质量分别为1.38 g、10.3 g、0.236 g和4.62 g，而其他元素（石墨）的质量为23.16 g。真空焙烧后破碎筛分得到的150 ~ 125 μm、125 ~ 106 μm和106 ~ 90 μm 3个粒度分数的组成基本相似。另一方面，+425 μm尺寸段含有大量的箔状材料。采用425 μm的筛子，从锂离子电池燃烧后的破碎产物中分离出了较大粒径的Al和Cu。使用筛网尺寸较大的筛网，例如5-10 mm，从电极材料的粉碎产物中分离出Al、Cu和Fe等箔状元素是很重要的。
Analysis of the chemical composition of spent cylindrical Li-ion batteries for PC, and investigation of the separation of each metal (Li, Co, Ni, Cu) from the Li-ion batteries were carried out by burning under a vacuum, crushing and screening, in order to recover rare metals from the Li-ion batteries. The cylindrical Li-ion batteries have the structure that the multi-layered electrodes with four−layered foils composed of anode, cathode and two separators are enrolled cylindrically around the core steel bar. Seven kinds of metal such as Li, Co, Ni, Fe, Mn, Al and Cu mainly exist in the Li-ion battery. The whole mass of Li-ion battery used in this study is 39.7 g. The mass of Li, Co, Ni and Cu is 1.38 g, 10.3 g, 0.236 g and 4.62 g, respectively, in one piece of Li-ion battery, while other elements (graphite) are 23.16 g. Three size fractions of 150-125, 125-106 and 106-90 μm obtained by crushing and screening after burning under a vacuum and removing stainless case show almost similar compositions. On the other hand, the size fraction of +425 μm contains a lot of foil-like materials. The separation of Al and Cu with a larger particle size from the crushed product of a burned Li-ion battery is accomplished by using a 425 μm sieve. It is important to separate the foil-like elements such as Al, Cu and Fe from the crushed products of electrode materials by using a sieve with a larger mesh size, for example 5-10 mm.