湿法冶金法从镀镍的A3钢电池壳中合成LiFePO4电池正极前驱体

R. Aisyah, S. T. Samudera, A. Jumari, A. Nur
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引用次数: 2

摘要

磷酸铁型锂电池正极合成中最为人熟知的材料之一是磷酸铁前驱体。采用酒石酸溶液浸出法制备前驱体,并对浸出温度和浸出时间进行了优化。温度变量为30℃、50℃、70℃、90℃。时间变量是3小时,6小时和9小时。主要使用的材料是从镀镍的A3钢电池壳中提取的铁。利用原子吸收分光光度法(AAS)从吸光度中计算出回收铁的浓度和数量。原子吸收光谱分析表明,在浸出9 h时,铁的吸收率分别为1.02%(30℃)、2.76%(50℃)、9.93%(70℃)和34.31%(90℃)。分析表明,在浸出温度最高的9小时内,铁回收率最高。不同浸出温度下的x射线衍射分析表明,形成的磷酸铁晶体与磷酸铁商业前驱体相比较,扫描电镜分析显示,磷酸铁颗粒形貌均匀。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of FePO4 Precursor for LiFePO4 Battery Cathode from Used Nickel Plated A3 Steel Battery Shell by Hydrometallurgy Processing
One of the most well-known material for lithium battery cathode synthesis of lithium ferro-phosphate type is iron phosphate precursor. The precursor is synthesized by the use of leaching method with tartaric acid solution with optimization at various leaching temperature and time. The temperature variables are at 30 ℃, 50 ℃, 70 ℃, and 90 oC. The time variables are at 3 hours, 6 hours, and 9 hours. The main material that is used is iron from used nickel plated A3 steel battery shell. The recovered iron concentration and quantity is calculated from absorbance by atomic absorption spectrophotometry (AAS). AAS analysis indicates the absorbed Fe is rated at 1,02 % (30 ℃, 2,76 % (50 ℃), 9,93 % (70 ℃), and 34,31 % (90 ℃) during 9 hours of leaching.The analysis indicates the recovered iron is rated the highest during 9 hours of leaching at the highest temperature. X-ray diffraction analysis at various leaching temperature variable indicates formation of iron phosphate crystal to be compared with iron phosphate commercial precursor, while scanning electron microscope analysis shows uniform iron phosphate particle morphology.
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