Investigation of the leaching mechanism of NMC 811 (LiNi(0.8)Mn(0.1)Co(0.1)O(2)) by hydrochloric acid for recycling lithium ion battery cathodes.
Investigation of the leaching mechanism of NMC 811 (LiNi(0.8)Mn(0.1)Co(0.1)O(2)) by hydrochloric acid for recycling lithium ion battery cathodes.
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DOI：
10.1039/c9ra06686a
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发表时间：
2019-11-25
期刊：
影响因子：
3.9
通讯作者：
Chagnes, Alexandre
中科院分区：
文献类型：
--
作者：
Xuan, Wen;Otsuki, Akira;Chagnes, Alexandre
本文研究了下一代锂离子电池正极材料LiNi0.8Mn0.1Co0.1O2（NMC 811）在盐酸中的浸出反应。这项研究表明，锂的浸出行为与NMC 811中所含的镍、钴和锰的浸出行为完全不同，因为锂的溶解速度比镍、钴和锰的溶解速度快。浸出动力学数据的分析证明，NMC 811溶解分两步进行。在第一步中，NMC转变成含有较少锂的新相（2.8 < n < 3.6）：第一步：其中M = Ni、Mn、Co。在第二步中，溶解新相（限制步骤）：第二步：最后，NMC 811盐酸浸出的总反应可写为：2LiMO_2（s）+ 8HCl（l）→ 2LiCl（l）+2MCl_2（l）+4H_2O（l）+Cl_2（g）。本文研究了下一代锂离子电池正极材料LiNi0.8Mn0.1Co0.1O2（NMC 811）在盐酸中的浸出反应。
This paper investigates the reactions involved when LiNi0.8Mn0.1Co0.1O2 (NMC 811), which is one of the most promising positive electrodes for the next generation of lithium-ion batteries, is leached by hydrochloric acid. This study shows that the leaching behaviour of lithium is quite different than those observed for nickel, cobalt and manganese contained in NMC 811 since lithium dissolution is faster than those observed for nickel, cobalt and manganese. Analysis of leaching kinetic data evidenced that NMC 811 dissolution occurs in two steps. In the first step, NMC is transformed into a new phase which contains less lithium (2.8 < n < 3.6): 1st step: where M = Ni, Mn, Co. In the second step, the new phase is dissolved (limiting step): 2nd step: . Finally, the overall reaction of NMC 811 leaching by hydrochloric acid can be written as: 2LiMO2,(s) + 8HCl(l) ⇌ 2LiCl(l) + 2MCl2,(l) + 4H2O(l) + Cl2,(g). This paper investigates the reactions involved when LiNi0.8Mn0.1Co0.1O2 (NMC 811), which is one of the most promising positive electrodes for the next generation of lithium-ion batteries, is leached by hydrochloric acid.
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