Study on the reduction roasting of spent LiNixCoyMnzO2 lithium-ion battery cathode materials
Study on the reduction roasting of spent LiNixCoyMnzO2 lithium-ion battery cathode materials
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废LiNixCoyMnzO2锂离子电池正极材料还原焙烧研究
DOI：
10.1007/s10973-018-7732-7
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发表时间：
2018-10
影响因子：
4.4
通讯作者：
Zhu Yirong
中科院分区：
文献类型：
--
作者：
Liu Pengcheng;Xiao Li;Tang Yiwei;Chen Yifeng;Ye Longgang;Zhu Yirong
探索了从废锂离子电池中简单、环保地回收有价金属的方法。实验方法包括还原焙烧和湿法冶金回收，称为准可逆过程。准可逆模型背后的原理可用于评估从阴极活性材料回收金属期间消耗的能量。采用TG-DSC和Kissinger方程对焙烧过程进行了分析。采用XRD和失重率分析了层状LiNixCoyMnzO 2分解为Li 2CO 3、MnO、NiO、Ni和Co的过程，考察了焙烧温度、焦炭用量和焙烧时间对Li、Ni、Co和Mn浸出率的影响。结果表明，最佳焙烧条件为：焙烧温度650 °C，焦炭用量10%，焙烧时间30 min。在最佳工艺条件下焙烧的产物用于浸出有价金属，Li、Ni、Co和Mn的浸出率分别为93.67%、93.33%、98.08%和98.68%。从水浸回收的Li 2CO 3溶液可用于蒸发结晶制备Li 2CO 3。此外，通过酸浸获得的Ni，Co和Mn的二价溶液，无需添加还原剂，可以在三元前驱体的共沉淀中循环使用。
Simple and environment-friendly recovery of valuable metals from spent LIBs was explored. The experimental method, which included reduction roasting and hydrometallurgical recovery, is called a quasi-reversible process. The principle behind the quasi-reversible model could be used to assess the energy consumed during the recovery of metals from cathode active materials. The roasting process was analysed using TG–DSC and Kissinger equation. XRD patterns and mass loss ratios were used to investigate the layered LiNixCoyMnzO2 that broke into Li2CO3, MnO, NiO, Ni and Co. Roasting temperature, coke dosage and roasting time were assessed to determine the leaching efficiency of Li, Ni, Co and Mn. Results indicated that the optimum roasting conditions were roasting temperature of 650 °C, coke dosage of 10% and roasting time of 30 min. The roasted products under the optimum parameters were used to leach the valuable metals, and the leaching efficiencies of Li, Ni, Co and Mn were 93.67%, 93.33%, 98.08% and 98.68%, respectively. Li2CO3 solution recovered from water leaching could be utilised to produce Li2CO3 by evaporative crystallisation. Moreover, divalent solution of Ni, Co and Mn obtained via acid leaching without added reducer could be recycled in the co-precipitation of the ternary precursor.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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