Lithium iron phosphate (LiFePO) is the widely used cathode material for safe and high-power lithium-ion batteries (LIBs) for electric vehicles (EVs). Therefore, numerous challenges to re-manufacturing, re-use, and recovery from spent LiFePO/C are tolerated if evaluated early in the innovation process. Herein, innovative green intense tetra-eutectic solvent (ITES) has been used to recover a new Li-metal co-intercalation compound from spent LiFePO/C cathode material, which is simple and cost-effective. The ITES leaching concerning organic solution with active hydrogen donor-acceptor salts creates a coordination environment through occlusion co-precipitate new co-intercalation compound at room temperature. Innovative green ITES-10 solution has successfully recovered a new Li-metal co-intercalation regarding the active hydrogen donor-acceptor bonding coordination environment of ITES adequate leaching solution and proposed recovery mechanism. The ICP-MS value of recovery metal (Li) efficiency (%) of ITES-10 leaching for spent LiFePO₄/C cathode materials reaches approximately 0.452% at room temperature for recovery of new co-intercalation compound, besides the fresh LiFePO₄/C cathode materials (as reference), approximately 0.805%, respectively. Therefore, innovative ITES is considered to recover spent Li-based cathode materials in our future works concerning high leaching recovery rates below 100 °C in experimental conditions.

中文翻译：

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创新的绿色强四共晶溶剂 (ITES)，可在室温下通过吸留共沉淀进行回收

磷酸铁锂 (LiFePO) 是电动汽车 (EV) 安全高功率锂离子电池 (LIB) 广泛使用的正极材料。因此，如果在创新过程的早期进行评估，则可以容忍废旧 LiFePO/C 的再制造、再利用和回收面临的众多挑战。在此，创新的绿色强四共晶溶剂 (ITES) 已用于从废旧 LiFePO/C 正极材料中回收新的锂金属共插层化合物，该方法简单且经济高效。有机溶液中活性氢供体-受体盐的 ITES 浸出通过在室温下吸留共沉淀新的共插层化合物来创造配位环境。创新的绿色 ITES-10 溶液已成功回收了关于 ITES 充分浸出溶液的活性氢供体-受体键合配位环境的新型锂金属共插层并提出了回收机制。 ITES-10 浸出废旧 LiFePO₄/C 正极材料后，ICP-MS 值金属（Li）回收效率（%）在室温下达到约 0.452%，用于回收新的共插层化合物，而新鲜的 LiFePO₄/C 正极材料（作为参考）约为 0.805%。因此，在我们未来的工作中，创新的 ITES 被认为是回收废旧锂基正极材料的最佳方法，在实验条件下，在 100°C 以下实现高浸出回收率。