酸性渗滤液中磷酸铁锂直接水热再生及高附加值利用

IF 7.1 2区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Shiyu Zhou , Qiang Li , Penglin Wang , Dongxian Chen , Shuai Gu , Jianguo Yu
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引用次数: 0

摘要

为了解决全球锂短缺问题,通过晶格重建直接再生降解阴极为回收废旧锂离子电池(lib)提供了一种生态高效的策略。然而,工业采用受到残留缺陷和锂补充不足的阻碍。在这里,我们提出了一种开创性的高价值再利用途径,将再生磷酸铁锂(LFP)作为酸稳定吸附剂,优先从酸性渗滤液中提取锂。热力学和电化学分析表明,强还原剂有利于晶格重构。再生的LFP在220°C下使用抗坏血酸进行2小时的水热修复,在没有电极溶解的情况下,表现出38.5 mg/g的锂提取能力,选择性地将剩余锂还原为
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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

Direct hydrothermal regeneration and high value-added utilization of spent lithium iron phosphate for priority lithium extraction from acidic leachate
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 °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.
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来源期刊
Waste management
Waste management 环境科学-工程:环境
CiteScore
15.60
自引率
6.20%
发文量
492
审稿时长
39 days
期刊介绍: Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)
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