采用温和有机酸混合物设计的用于废旧锂离子电池钴酸锂正极粉末的高效且环保的回收工艺。
Effective and environmentally friendly recycling process designed for LiCoO cathode powders of spent Li-ion batteries using mixture of mild organic acids.
作者信息
Nayaka G P, Zhang Yingjie, Dong Peng, Wang Ding, Pai K V, Manjanna J, Santhosh G, Duan Jianguo, Zhou Zhongren, Xiao Jie
机构信息
National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
出版信息
Waste Manag. 2018 Aug;78:51-57. doi: 10.1016/j.wasman.2018.05.030. Epub 2018 May 28.
An effective and environmentally friendly recycling process designed for LiCoO cathode powders of spent Li-ion batteries using mixture of mild organic acids, citric acid (CA), tartaric acid (TA) and ascorbic acid (AA), to recover the metals. Almost complete dissolution of Li and nearly 90% dissolution of Co occurred in at 80 °C for 6 h. The reducing agent, ascorbic acid (AA), converts the dissolved Co(III) to Co(II) thereby selective recovery of Co as Co(II)-oxalate is possible. The formation of Co(III)-and Co(II) complex is evident from the UV-Vis spectra of the dissolved solution as a function of dissolution time. Thus, the reductive-complexing dissolution mechanism is proposed here. These mild organic acids are environmentally benign unlike the mineral acids.
一种有效且环保的回收工艺，该工艺使用柠檬酸（CA）、酒石酸（TA）和抗坏血酸（AA）等温和有机酸的混合物，用于回收废旧锂离子电池的LiCoO正极粉末中的金属。在80°C下反应6小时，Li几乎完全溶解，Co的溶解率接近90%。还原剂抗坏血酸（AA）将溶解的Co(III)转化为Co(II)，从而有可能选择性地回收Co形成Co(II)草酸盐。从溶解溶液的紫外可见光谱随溶解时间的变化可以明显看出Co(III)和Co(II)配合物的形成。因此本文提出了还原络合溶解机制。与无机酸不同，这些温和的有机酸对环境无害。
Zotero 插件