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废旧锂离子电池硫酸铵焙烧的机理

Mechanisms of the Ammonium Sulfate Roasting of Spent Lithium-Ion Batteries.

作者信息

Qu Xin, Tang Yiqi, Li Mengting, Liu DongXu, Gao Shuaibo, Yin Huayi

机构信息

School of Resource and Environmental Sciences Wuhan University 299 Bayi Road, Wuchang District Wuhan 430072 P. R. China.

Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education School of Metallurgy Northeastern University Shenyang 110819 P. R. China.

出版信息

Glob Chall. 2022 Nov 18;6(12):2200053. doi: 10.1002/gch2.202200053. eCollection 2022 Dec.

DOI:10.1002/gch2.202200053
PMID:36532237
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9749078/
Abstract

Ammonium sulfate ((NH)SO) assisted roasting has been proven to be an effective way to convert spent lithium-ion battery cathodes to water-soluble salts. Herein, thermogravimetric (TG) experiments are performed to analyze the mechanism of the sulfation conversion process. First, the reaction activation energies of the sulfate-assisted roasting are 88.87 and 95.27 kJ mol, which are calculated by Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) methods, respectively. Then, nucleation and growth are determined and verified as the sulfation reaction model by the Šatava-Šesták method. Finally, sub-reactions of the sulfation process are investigated and reaction controlling mechanisms are determined by the contribution of sub-reaction. Based on the thermogravimetric analysis, the phase boundary reaction is found to dominate in the initial step of the roasting process (α < 0.6) while the nucleation reaction controlls the following step (α > 0.6), agreeing well with changing trend of activation energy. Overall, thermogravimetric analysis is a general way to study the mechanism of the various roasting processes.

摘要

硫酸铵（(NH)₂SO₄）辅助焙烧已被证明是一种将废旧锂离子电池正极转化为水溶性盐的有效方法。在此，进行热重（TG）实验以分析硫酸化转化过程的机理。首先，通过基辛格 - 赤平 - ose（KAS）法和弗林 - 沃尔 - 小泽（FWO）法计算得到硫酸辅助焙烧的反应活化能分别为88.87和95.27 kJ/mol。然后，通过Šatava - Šesták法确定并验证成核和生长为硫酸化反应模型。最后，研究硫酸化过程的子反应，并通过子反应的贡献确定反应控制机制。基于热重分析，发现相边界反应在焙烧过程的初始阶段（α < 0.6）占主导，而成核反应在后续阶段（α > 0.6）控制反应，这与活化能的变化趋势吻合良好。总体而言，热重分析是研究各种焙烧过程机理的通用方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/f504662f6426/GCH2-6-2200053-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/049913cee81e/GCH2-6-2200053-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/f52c4c9189bb/GCH2-6-2200053-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/81649c2e7c7d/GCH2-6-2200053-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/facda2fd5a14/GCH2-6-2200053-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/f504662f6426/GCH2-6-2200053-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/049913cee81e/GCH2-6-2200053-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/f52c4c9189bb/GCH2-6-2200053-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/81649c2e7c7d/GCH2-6-2200053-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/facda2fd5a14/GCH2-6-2200053-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c041/9749078/f504662f6426/GCH2-6-2200053-g002.jpg

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本文引用的文献

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Hydrometallurgical recovery of spent cobalt-based lithium-ion battery cathodes using ethanol as the reducing agent.
使用乙醇作为还原剂，从废钴基锂离子电池正极中进行湿法冶金回收。
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