摘要
通过热处理法和溶解法,对废旧动力锂离子电池电极活性物质磷酸铁锂(LiFePO_4)进行处理。与700℃热处理再生的材料相比较,经350℃热处理的活性物质在结晶度、首次充放电和循环稳定性等方面表现较好。经350℃热处理的LiFePO_4,以0. 2C在2. 0~4. 2V循环,首次放电比容量达120 mAh/g,第40次循环的比容量为130 mAh/g,库仑效率保持在99%。
The waste electrode materials were investigated by the heat treatment method and solvent method for recycling. Compared with the regenerated materials calcined at 700 ℃,the active materials treated at 350 ℃ exhibited better electrochemical performance in crystallinity,initial charge-discharge and cycle stability. The initial specific discharge capacity of recycled LiFePO_4 was 120 m Ah/g calcined at 350 ℃ and reached 130 m Ah/g after 40 cycles at 0. 2 C in 2. 0-4. 2 V and the Coulombic efficiency was still 99%.
引文
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