科研之友
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摘要
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 mu m 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 mu m 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 mu m 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
- 出版日期2010-10
