Ascorbic-acid-assisted recovery of cobalt and lithium from spent Li-ion batteries
Ascorbic-acid-assisted recovery of cobalt and lithium from spent Li-ion batteries
复制标题
DOI：
10.1016/j.jpowsour.2012.06.068
复制
发表时间：
2012-11-15
影响因子：
9.2
通讯作者：
Amine, Khalil
中科院分区：
文献类型：
--
作者：
Li, Li;Lu, Jun;Amine, Khalil
从废旧锂离子电池（LIB）中回收主要组分被认为是防止环境污染和回收有价值金属的理想选择。本工作研究了一种新的方法来回收钴和锂的正极材料（含有LiCoO 2和Al）的组合超声波洗涤，煅烧，有机酸浸出。铜也可以在阳极材料与阴极手动分离后从阳极材料中回收。选择抗坏血酸作为浸出剂和还原剂，以提高钴的回收率。在1.25 mol L-1抗坏血酸溶液、70 ℃浸出时间20 min、固液比25 gL（-1）条件下，钴和锂的浸出率分别达到94.8%和98.5%。从抗坏血酸的结构出发，对酸浸反应机理进行了初步研究。这种方法被证明是一种有效的方法来回收有价值的材料从废LIB，它可以扩大到商业应用。(C)2012爱思唯尔有限公司版权所有。
Recycling of the major components from spent Li-ion batteries (LIBs) is considered desirable to prevent environmental pollution and recycle valuable metals. The present work investigates a novel process for recovering Co and Li from the cathode materials (containing LiCoO2 and Al) by a combination of ultrasonic washing, calcination, and organic acid leaching. Copper can also be recovered from the anode materials after they are manually separated from the cathode. Ascorbic acid is chosen as both leaching reagent and reducing agent to improve the Co recovery efficiency. Leaching efficiencies as high as 94.8% for Co and 98.5% for Li are achieved with a 1.25 mol L-1 ascorbic acid solution, leaching temperature of 70 degrees C, leaching time of 20 min, and solid-to-liquid ratio of 25 gL(-1). The acid leaching reaction mechanism has been preliminarily studied based on the structure of ascorbic acid. This method is shown to offer an efficient way to recycle valuable materials from spent LIBs, and it can be scaled up for commercial application. (C) 2012 Elsevier B.V. All rights reserved.