摘要
电动汽车的发展有效缓解了化石能源消耗以及由燃油汽车带来的尾气排放等问题。随着电动汽车的发展,废旧锂离子电池的回收受到了更多的重视。介绍一种绿色的废旧磷酸铁锂电池回收方法。在实验过程中,考察了温度、时间、乙酸浓度以及液固比对浸出过程的影响。结果表明:在温度为40℃,浸出时间为30 min,乙酸浓度为2 mol‧L^(-1),液固比为10 mL·g^(-1)时,最高的Li浸出率为89.59%。考虑经济性时,温度为30℃,浸出时间为30 min,乙酸浓度为1 mol‧L^(-1),液固比为8 mL‧g^(-1)时,最高的Li浸出率仍有85.20%。SEM和XRD表征结果表明,酸浸反应后LiFePO_(4)可以直接转化为FePO_(4)。
The development of electric vehicles has effectively alleviated the problems of fossil energy consumption and exhaust emissions caused by fuelled vehicles.With the development of electric vehicles,more and more attention has been paid to the recycling of waste lithium-ion batteries.This paper introduces a green recycling method for waste lithium iron phosphate battery.During the experiment,the effects of temperature,time,acetic acid concentration and liquid-solid ratio on the leaching process were investigated.The results showed that when the temperature was 40℃,the leaching time was 30 min,the acetic acid concentration was 2 mol‧L^(-1),and the liquid-solid ratio was 10 mL·g^(-1),the highest Li leaching rate was 89.59%.Considering the economy,when the temperature is 30℃,the leaching time is 30 min,the acetic acid concentration is 1 mol‧L^(-1),and the liquid-solid ratio is 8 mL·g^(-1),the highest Li leaching rate is still 85.20%.SEM and XRD results showed that LiFePO_(4) could be directly transformed into FePO_(4) after acid leaching reaction.
作者
欧阳兵
李高淼
李嘉
晏越
张国权
OUYANG Bing;LI Gaomiao;LI Jia;YAN Yue;ZHANG Guoquan(China National Chemical Southwest Engineering Technology Co.,Ltd.,Chengdu Sichuan 610000,China;School of chemical engineering,Sichuan University,Chengdu Sichuan 610065,China)
出处
《辽宁化工》
2025年第9期1542-1546,共5页
Liaoning Chemical Industry
关键词
锂离子电池
磷酸铁锂
乙酸
酸浸
Lithium ion battery
Lithium iron phosphate
Acetic acid
Acid leaching
