标题: Co-recycling of LiCoO<sub>2</sub> and LiFePO<sub>4</sub> enabled by self-redox reactions and electrochemical mediation
作者: Zhao, JJ (Zhao, Jingjing); Wang, DF (Wang, Danfeng); Zhou, FY (Zhou, Fengyin); Wang, HY (Wang, Hongya); Qu, X (Qu, Xin); Cai, YQ (Cai, Yuqi); Zheng, ZY (Zheng, Zhiyu); Wang, DH (Wang, Dihua); Yin, HY (Yin, Huayi)
来源出版物: JOURNAL OF POWER SOURCES 卷: 653 文献号: 237720 DOI: 10.1016/j.jpowsour.2025.237720 Published Date: 2025 OCT 15
摘要: The recycling of spent lithium-ion batteries (LIBs) is pivotal for advancing industrial resource sustainability and economic viability. However, conventional recovery processes face significant challenges, including excessive energy consumption, reagent overuse, and inefficiencies in material separation. Herein, a slurry electrochemical assisted method is proposed for co-recycling spent LiCoO2 (LCO) and LiFePO4 (LFP) enabled by their redox reactions. The redox reaction of LCO and LFP allows the leaching efficiency of Li to reach 99.4 % and Co to achieve 98.1 % at the conditions of 1 mol L-1 H2SO4 and under a constant cell voltage of 3 V. Over the process, the dissolved Fe2+ from LFP in the beginning plays a critical reduction role in destructing the stable structure of LCO. And the additional applied electricity reinforces the circulate of proton, thus enhancing the utilization rate of acid close to similar to 99 %. More importantly, over 90 % of Fe3+ is directly precipitated to FePO4<middle dot>2H(2)O without the precipitant additive. What's more, the relatively high solid-liquid ratio of 132.5 g L-1 simplifies the separation step and reduces process energy consumption. This study optimizes metal recovery efficiency through advanced electrochemical assisted co-leach and selective separation strategies, aiming to reconcile industrial scalability with circular economy goals.
作者关键词: Co-recovery; Spent LiFePO4 batteries; Spent LiCoO2 batteries; Electrochemical assisted leaching
KeyWords Plus: LITHIUM-ION BATTERIES; REDUCTION; RECOVERY; COBALT
地址: [Zhao, Jingjing; Wang, Danfeng; Zhou, Fengyin; Wang, Hongya; Qu, Xin; Cai, Yuqi; Zheng, Zhiyu; Wang, Dihua; Yin, Huayi] Wuhan Univ, Sch Resource & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.
[Wang, Dihua; Yin, Huayi] Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.
[Wang, Dihua; Yin, Huayi] Wuhan Univ & Chilwee, Joint Ctr Green Mfg Energy Storage Mat, Wuhan 430072, Peoples R China.
通讯作者地址: Yin, HY (通讯作者)，Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.
电子邮件地址: yinhuayi@whu.edu.cn
影响因子：7.9
