摘要
采用高温固相法直接再生磷酸铁锂（LiFePO4），去除杂质，恢复电化学性能。对再生材料进行物理性能、XRD和充放电性能分析。n（Li）∶n（Fe）∶n（P）＝1.1∶1.0∶1.0，采用氮氢混合气体保护，在500＆#177;15℃下进行一次焙烧、在700＆#177;15℃下进行二次焙烧，得到的样品性能良好。碳含量为7.12％；在2.5～4.2 V充放电，0.1 C首次放电比容量可达141.5 mAh/g，1.0 C循环100次的容量保持率为97.84％。
Lithium iron phosphate（LiFePO4 ）was directly recycled by high-temperature solid-state method,which removed impuri-ties to restore its electrochemical performance. The physical properties,XRD and charged-discharged performance analyses of recycled material were taken. When n（Li）∶n（Fe）∶n（P）=1.1∶1.0∶1.0,first roasting at 500 ＆#177;15 ℃ and second roasting at 700 ＆#177;15 ℃with the protect of nitrogen-hydrogen mixture,the obtained sample had fine performance. The content of carbon was 7.12%;when charged-discharged in 2.5 ~4.2 V,the initial specific discharge capacity was 141.5 mAh/g at 0.1 C,and the capacity retention was 97.84% after 100 cycles at 1.0 C.
出处
《电池》
CAS
CSCD
北大核心
2014年第1期60-62,共3页
Battery Bimonthly
关键词
高温固相法
磷酸铁锂(LiFePO4)
杂质
再生
high-temperature solid-state method
lithium iron phosphate（ LiFePO4 ）
impurity
recycle
