回收廢二次鋰電池有價金屬

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回收廢二次鋰電池有價金屬

Recovery of Valuable Metals from Spent Secondary Lithium-ion Battery

林佳良 , Masters　　Advisor：王文裕　　

繁體中文

鈷；溶劑萃取；廢二次鋰電池；錳；鎳； Co ； Solvent Extraction ； Waste Secondary Li Battery ； Mn ； Ni

Abstract │ Reference (66) │ Times Cited (3) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

Waste battery recycling factories under operation in Taiwan only process Zn/MnO2 batteries and Alkali Mn batteries. The recycled Li batteries are exported to overseas regions for process. When the chemical deposition approach is applied in the new ternary Li battery recycling process, due to all the three metals of Ni, Co, Mn deposit, the purity and value of metal resource recycling are greatly reduced. This study determined the optimal recycling technical parameters and optimal parameter items of various recycling processes of the waste ternary secondary Li battery anode materials, including the types of impregnation liquid, extract PH value, back-extract pH value, operating temperature, and time.
The results showed that the method of adding hydrogen peroxide to assist vitriol at the time when extracting metal is helpful for metal leaching from metal oxide. The improvement of temperature can promote the functioning of vitriol to leach metal from metal oxide. The optimal operating parameter is to impregnate anode materials to 1 g: 25ml 4.0N H2SO4, heat up to 50±5℃, mix for 3hr, and add hydrogen peroxide (35%) which is equivalent to 1% vitriol volume per hour.
The operation for recycling high purity substance by extracting Mn by D2EHPA was performed in low extraction rate, because high extraction rate would result in recycling of low purity substance. After three times of circulated extraction and back extraction, the Mn extraction rate improved from 54% to 80% and 94%. The optiml operating parameter of pH value is 2.5.
When extracting Co by HEHEHP, the Ni was also extracted, so that the pH value for the first time of extraction was 4.5, and the value was 3.5 for the second time. After two times of circulated extraction and back extraction, the Co extraction rate improved from 89% to 96% gradually.

Reference ( 66 ) 〈TOP〉

18.湯承憲，以二(2-乙基己基)磷酸含浸樹脂吸附鉻(III)離子之平衡研究，國立臺北科技大學化工所碩士論文(2006)。
連結：
19.黃世宏，萃取樹脂之合成及其在分離上之應用，國立成功大學化學工程研究所碩士論文(1992)。
連結：
24.劉如喜，鋰離子二次電池材料簡介，化學第57卷第2期(1999)。
連結：
29.謝嘉容，以D2EHPA含浸樹脂萃取鐵離子之平衡及動力學研究，國立臺北科技大學化工所碩士論文(2005)。
連結：
31.Beer, H.B., “The invention and industrial development of metal anodes”, Journal of The Electrochemical Society, 127, 303C-307C(1980).
連結：

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