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Comprehensive recovery of mixed spent of LiNi x Co y Mn (1−x−y) O 2 and LiFePO 4
Journal of Material Cycles and Waste Management ( IF 2.7 ) Pub Date : 2020-06-08 , DOI: 10.1007/s10163-020-01059-6
Honghui Tang , Feng Tan , Xi Dai , Yanchao Qiao , Xianliang Zheng

Lithium-ion batteries are currently being scrapped in large quantities, and there are almost no reports of mixed waste disposal. This paper describes research on a comprehensive recovery process for the mixed waste of LiNixCoyMn(1−xy)O2 and LiFePO4. The interaction of LiFePO4 and LiNixCoyMn(1−xy)O2 is utilized to achieve selective leaching through a low H2SO4-low H2O2 system, removal of P and Fe by Fe2(SO4)3-NaOH, preparation of Ni–Co–Mn hydroxide by addition of NaOH, preparation of Li3PO4 using Na3PO4, and separation of Fe and P by acid. The research shows that when 5.23 ml/g 1 M H2SO4 and 0.308 g/g 30% H2O2 were added at 90 °C for 5 h, the leaching ratios of Li, Ni, Mn, and Co achieved were 99.589%, 98.524%, 97.079%, and 96.257%, respectively. At 90 °C and a pH 12 for 2 h, the precipitation ratios of Ni, Co, and Mn were 99.79%, 99.89%, and 99.89%, respectively. A total of 55.12 g/l of Na3PO4 was added to the solution to effect settling of Li, and a sedimentation rate of 98.46% was achieved. The leaching residue was dissolved in 3 M HCl of 6.62 ml/g, and the achieved leaching ratio of the FePO4 was more than 95%.



中文翻译:

LiNi x Co y Mn(1-x-y)O 2和LiFePO 4混合废料的综合回收

锂离子电池目前正在大量报废,几乎没有关于混合废物处置的报道。本文介绍了LiNi x Co y Mn (1- x - y O 2和LiFePO 4混合废料的综合回收工艺的研究。的LiFePO的相互作用4和的LiNi XÝ(1- X - Ý Ö 2被用来实现通过一个低选择性浸出ħ 2 SO 4 -低ħ 2 ö 2系统,通过Fe 2(SO 43 -NaOH去除P和Fe,通过添加NaOH制备Ni-Co-Mn氢氧化物,使用Na 3 PO 4制备Li 3 PO 4以及通过以下方法分离Fe和P酸。研究表明,在90°C下加入5.23 ml / g 1 MH 2 SO 4和0.308 g / g 30%H 2 O 2 5 h时,Li,Ni,Mn和Co的浸出率达到99.589。 %,98.524%,97.079%和96.257%。在90°C和pH值为12的条件下放置2小时,Ni,Co和Mn的沉淀率分别为99.79%,99.89%和99.89%。总共55.12 g / l Na 3 PO将4添加到溶液中以实现Li的沉降,并且达到98.46%的沉降率。浸出残渣溶解在6.62ml / g的3M HCl中,FePO 4的浸出率达到95%以上。

更新日期:2020-06-08
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