Lithium is an important alkalinous metal with a wide range of usage and high economic value. With the transformation of the global energy structure and the rapid development of a new energy industry, the demand for lithium is increasing. Therefore, it is of great strategic significance and economic value to find new ways to obtain lithium resources. The total amount of secondary lithium resources is abundant, but the current research mainly focuses on lithium extraction from waste lithium-ion batteries (LIBs), rather than the waste resources generated during LIB production. Therefore, in this study, the sludge generated during the production of lithium iron phosphate batteries (LiFePO₄, LFP) is used as a raw material to extract lithium using the leaching system of H₂SO₄–H₂O₂, and factors that impact the leaching efficiency are discussed. The results show that the leaching efficiency of lithium could reach 99.32% under optimal experimental conditions. Thermodynamic and kinetic analyses indicate that lithium sludge leaching by sulfuric acid can occur spontaneously at room temperature, and the leaching process is controlled by a combination of chemical reaction and diffusion. The research results provide a new approach for lithium supply, showing a good perspective.

中文翻译：

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一种通过从磷酸铁锂电池生产过程中产生的污泥中回收锂来获取锂资源的新方法


锂是一种重要的碱性金属，用途广泛，经济价值高。随着全球能源结构的转变和新能源产业的快速发展，对锂的需求越来越大。因此，寻找获取锂资源的新途径具有重要的战略意义和经济价值。二次锂资源总量丰富，但目前的研究主要集中在从废旧锂离子电池 （LIB） 中提取锂，而不是 LIB 生产过程中产生的废弃资源。因此，本研究以磷酸铁锂电池（LiFePO 4，LFP）生产过程中产生的污泥为原料，利用H₂SO₄–H₂O₂的浸出系统提取锂，并讨论了影响浸出效率的因素。结果表明，在最佳实验条件下，锂的浸出效率可达 99.32%。热力学和动力学分析表明，硫酸对锂污泥的浸出可以在室温下自发发生，并且浸出过程受化学反应和扩散的结合控制。研究结果为锂供应提供了一种新的途径，显示出良好的前景。