利用废旧锂电池固有的“点阵氧化还原能”回收金属元素

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2025-05-01 DOI:10.1016/j.resconrec.2025.108345

Honghuai Sun , Huiliang Hou , Qingming Song , Ya Liu , Bang Li , Zhenming Xu

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引用次数: 0

摘要

废锂电池正极材料具有氧化还原能力（“晶格氧化还原能”），这一点一直被人们所忽视。本研究将SLIB回收定义为电池制造的逆向过程，提出在回收过程中利用其固有的氧化驱动力来替代外部供应的氧化还原试剂。通过揭示LiCoO2 （LCO）晶格氧化还原电位调控机理，构建了以Fe2+/Fe3+为“电子穿梭巴士”的LCO（或LiNixCoyMnzO2）电池和LiFePO4电池的自驱动回收工艺。经过10次循环，在不添加氧化还原剂、低酸度（pH值1.53）、低酸耗（化学计量量的1.04倍）、高固液比（98 g/L）的条件下，锂的浸出率达到100%，钴的浸出率达到96.5%。利用SLIBs的晶格氧化还原能量使回收过程中所需试剂的经济成本降低了42%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Recovery of metal elements from spent lithium batteries using their inherent “Lattice redox energy”

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Recovery of metal elements from spent lithium batteries using their inherent “Lattice redox energy”

Spent lithium batteries (SLIBs) cathode material possess the ability of redox (“lattice redox energy”), which was always overlooked. This study conceptualizes SLIB recycling as the reverse process of battery manufacturing, proposing to utilize inherent oxidative driving force to substitute the externally supplied redox reagents in recycling process. By revealing the mechanism of LiCoO₂ (LCO) lattice redox potential regulation, we constructed a self-driven recycling process for LCO (or LiNi_xCo_yMn_zO₂) batteries and LiFePO₄ batteries using Fe²⁺/Fe³⁺ as an “electron shuttle bus”. Though 10 cycles, under conditions of no added redox agent, low acidity (pH 1.53), low acid consumption (1.04 times the stoichiometric amount), and high solid-liquid ratio (98 g/L), the leaching efficiency reached 100 % for lithium and 96.5 % for cobalt. The utilization of lattice redox energy from SLIBs reduced the economic cost of reagents needed in the recycling process by 42 %.

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.