标题: Recycling of spent lithium nickel cobalt manganese oxides via sulfuric acid Roasting: Revealing the Product evolution mechanism

作者: Cai, YQ (Cai, Yuqi); Qu, X (Qu, Xin); Zhou, FY (Zhou, Fengyin); Ma, JY (Ma, Jianye); Cai, MY (Cai, Muya); Wang, DF (Wang, Danfeng); Wang, HY (Wang, Hongya); Zhao, JJ (Zhao, Jingjing); Zheng, ZY (Zheng, Zhiyu); Wang, DH (Wang, Dihua); Yin, HY (Yin, Huayi)

来源出版物: JOURNAL OF CLEANER PRODUCTION  卷: 510  文献号: 145620  DOI: 10.1016/j.jclepro.2025.145620  Early Access Date: MAY 2025  Published Date: 2025 JUN 10  

摘要: To mitigate the environmental impacts of spent lithium-ion batteries and enhance the sustainability of relative industry, the recovery of lithium nickel cobalt manganese oxide (LiNixCoyMnzO2) cathode materials is of paramount importance. Sulfation roasting is a powerful recycling method of LiNixCoyMnzO2 cathode but industrially restricted by the generation of AB2O4-type spinel transition metal oxides, sulfides or sulfur oxides (SOx), and the product formation process (especially of transition metal sulfides) is not well understood. In this paper, we reveal the intermediate reactions and products of the roasting process. We investigate the impacts of sulfide generation on recycling and make certain attempts to eliminate the hazardous side reactions. The temperature and graphite are two key parameters determining the formation of sulfides and the roasting products evolved from sulfates to oxides and then to sulfides with the temperature increasing. Under optimized experimental conditions, we suppress the generation of sulfides and AB2O4-type spinel oxides and obtain a Li leaching efficiency of over 98 %, minimal SOx emission and negligible loss of transition metals (less than 3 %), achieving the clean and effective recycling of LiNixCoyMnzO2 cathode materials.

作者关键词: Spent LIBs; Roasting; Sulfide generation; Product evolution; Cleaner recycling

KeyWords Plus: CATHODE MATERIALS; VALUABLE METALS; ION BATTERIES; RECOVERY

地址: [Cai, Yuqi; Qu, Xin; Zhou, Fengyin; Cai, Muya; Wang, Danfeng; Wang, Hongya; Zhao, Jingjing; Zheng, Zhiyu; Wang, Dihua; Yin, Huayi] Wuhan Univ, Sch Resource & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

[Ma, Jianye] Zhekuang Heavy Ind Co Ltd, Heping Town Ind Pk, Huzhou 313100, Zhejiang, Peoples R China.

通讯作者地址: Yin, HY (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

电子邮件地址: yinhuayi@whu.edu.cn

影响因子：10