标题: Fast ammonium sulfate salt assisted roasting for selectively recycling degraded LiFePO₄ cathode

作者: Qu, X (Qu, Xin); Ma, JY (Ma, Jianye); Zhang, BL (Zhang, Beilei); Zhao, JJ (Zhao, Jingjing); Qiu, BL (Qiu, Baolong); Chen, X (Chen, Xiang); Zhou, FY (Zhou, Fengyin); Li, XY (Li, Xiangyun); Gao, SB (Gao, Shuaibo); Wang, DH (Wang, Dihua); Yin, HY (Yin, Huayi)

来源出版物: JOURNAL OF CLEANER PRODUCTION卷: 435文献号: 140428 DOI: 10.1016/j.jclepro.2023.140428提前访问日期: JAN 2024

摘要: Selectively recycling degraded cathode materials from retired lithium-ion battery is an efficient approach which could shorten recovery processes and reduce energy consumption and carbon emissions. Herein, we propose a fast ammonium sulfate ((NH4)(2)SO4) salt roasting method to extract Li and recycle FePO4 from commerical LiFePO4 cathode materials. Compared with the traditional hydrometallurgy recovery process, (NH4)(2)SO4 assisted roasting achieved the fast delithiation of LiFePO4 within 5 min at 300 degree celsius, and converted LiFePO4 to FePO4 in air atmosphere. Almost 98% of Li was converted to soluble Li2SO4, and air acted as a clean and cheap oxidant. TG-DSC analysis in different atmospheres indicated that the whole reaction mainly consisted of two steps: (NH4)(2)SO4 firstly decomposed to NH4HSO4 and (NH4)(2)S2O7, and then the LiFePO4 reacted with O-2, (NH4)(2)SO4 and (NH4)(2)S2O7 at similar to 300 degrees C. Thermodynamic analysis also supported the above reaction mechanism. In a word, (NH4)(2)SO4 salt assisted roasting provides an effective approach to selectively extracting Li from polyanionic cathode materials.

作者关键词: Thermodynamics; Sulfation ammonium roasting; Selective extraction; Spent LiFePO4 batteries; Recycling

地址: [Qu, Xin; Zhao, Jingjing; Zhou, Fengyin; Li, Xiangyun; Gao, Shuaibo; Wang, Dihua; Yin, Huayi] Wuhan Univ, Sch Resource & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

[Qiu, Baolong; Chen, Xiang; Yin, Huayi] Northeastern Univ, Sch Met, Wenhua Rd, Shenyang 110819, Peoples R China.

[Zhang, Beilei] Henan Normal Univ, Sch Mat Sci & Engn, Xinxiang 453007, Peoples R China.

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

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

Yin, HY (通讯作者)，Northeastern Univ, Sch Met, Wenhua Rd, Shenyang 110819, Peoples R China.

电子邮件地址:yinhuayi@whu.edu.cn

影响因子：11.1