Spent lithium iron phosphate (LFP) batteries contain abundant strategic lithium resources and are thus considered attractive secondary lithium sources. However, these batteries may contaminate the environment because they contain hazardous materials. In this work, a novel process involving low-temperature heat treatment is used as an alternative pretreatment method for recycling spent LFP batteries. When the temperature reaches 300°C, the dissociation effect of the anode material gradually improves with heat treatment time. At the heat treatment time of 120 minutes, an electrode material can be dissociated. The extension of heat treatment time has a minimal effect on quality loss. The physicochemical changes in thermally treated solid cathode and anode materials are examined through scanning electron microscopy with energy-dispersive X-ray spectroscopy. The heat treatment results in the complete separation of the materials from aluminium foil without contamination. The change in heat treatment temperature has a small effect on the quality of LFP material shedding. When the heat treatment temperature reaches 300°C and the time reaches 120 minutes, heat treatment time increases, and the yield of each particle size is stable and basically unchanged. The method can be scaled up and may reduce environmental pollution due to waste LFP batteries.

废磷酸铁锂（LFP）电池包含丰富的战略锂资源，因此被认为是有吸引力的二次锂源。但是，这些电池可能含有有害物质，因此可能污染环境。在这项工作中，涉及低温热处理的新工艺被用作回收废旧LFP电池的替代预处理方法。当温度达到300℃时，负极材料的离解作用随着热处理时间而逐渐提高。在120分钟的热处理时间下，可以使电极材料离解。延长热处理时间对质量损失的影响最小。热处理后的固体阴极和阳极材料的物理化学变化通过具有能量色散X射线光谱的扫描电子显微镜检查。热处理导致材料与铝箔完全分离而不会受到污染。热处理温度的变化对LFP材料脱落的质量影响很小。当热处理温度达到300℃并且时间达到120分钟时，热处理时间增加，并且每种粒径的产率稳定并且基本不变。该方法可以扩大规模，并可以减少LFP废电池造成的环境污染。热处理温度的变化对LFP材料脱落的质量影响很小。当热处理温度达到300℃并且时间达到120分钟时，热处理时间增加，并且每种粒径的产率稳定并且基本不变。该方法可以扩大规模，并可以减少LFP废电池造成的环境污染。热处理温度的变化对LFP材料脱落的质量影响很小。当热处理温度达到300℃并且时间达到120分钟时，热处理时间增加，并且每种粒径的产率稳定并且基本不变。该方法可以扩大规模，并可以减少LFP废电池造成的环境污染。