文献类型：期刊文献

英文题名：Direct hydrothermal regeneration and high value-added utilization of spent lithium iron phosphate for priority lithium extraction from acidic leachate

作者：Zhou, Shiyu[1,2,3];Li, Qiang[4];Wang, Penglin[1,2,3];Chen, Dongxian[1,2,3];Gu, Shuai[1,2,3];Yu, Jianguo[1,2,3]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Joint Int Lab Potassium & Lithium Strateg Resource, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[4]Ganfeng Lithium Grp Co Ltd, Xinyu 338004, Jiangxi, Peoples R China

年份：2025

卷号：207

外文期刊名：WASTE MANAGEMENT

收录：;EI(收录号：20253819202018);WOS:【SCI-EXPANDED(收录号:WOS:001578215300001)】；

基金：This work was supported by the National Natural Science Foundation of China [grant number 52304422] , Shanghai Rising-Star Program [grant number 24QA2702000] , and the Major Research Plan of the National Natural Science Foundation of China [grant number 92475207] .

语种：英文

外文关键词：Spent lithium iron phosphate; Direct hydrothermal regeneration; Priority lithium extraction; High-value utilization

摘要：To address the global lithium shortage, direct regeneration of degraded cathodes via lattice reconstruction offers an eco-efficient strategy for recycling spent lithium-ion batteries (LIBs). However, industrial adoption is hindered by residual defects and insufficient lithium replenishment. Here, we propose a groundbreaking high-value reuse pathway, repurposing regenerated lithium iron phosphate (LFP) as an acid-stable adsorbent for priority lithium extraction from acidic leachate. Thermodynamic and electrochemical analyses suggested the stronger reductant facilitate the lattice reconstruction. The regenerated LFP, processed via a 2-hour hydrothermal repair at 220 degrees C using ascorbic acid, exhibited an exceptional lithium extraction capacity of 38.5 mg/g without electrode dissolution, selectively reducing residual lithium to < 20 ppm. By simultaneously enabling high-value utilization of spent LFP and priority lithium extraction, this paradigm bridges economic viability with circular economy principles, offering a blueprint for upcycling spent LIB materials.