CAJ | 학술논문

通过碳热还原，合成了不同钒掺杂量（x）的球形碳包覆磷酸铁锂（LiFePO4/C）材料LiFe1-xVxPO4/C。循环伏安和恒流充放电测试表明，适当的钒掺杂能改善材料的电化学性能。x＝0.05的材料，电化学性能较好，以0.1 C在2.5～4.2 V充放电，首次放电比容量为151.1 mAh/g，10.0 C倍率时，放电比容量仍能维持在104.4 mAh/g左右。
통과탄열환원，합성료불동범참잡량（x）적구형탄포복린산철리（LiFePO4/C）재료LiFe1-xVxPO4/C。순배복안화항류충방전측시표명，괄당적범참잡능개선재료적전화학성능。x＝0.05적재료，전화학성능교호，이0.1 C재2.5～4.2 V충방전，수차방전비용량위151.1 mAh/g，10.0 C배솔시，방전비용량잉능유지재104.4 mAh/g좌우。
By carbothermal reduction,spherical carbon coated lithium iron phosphate(LiFePO4/C)materials with different vana-dium doping amount(x)LiFe1 -x VxPO4/C was prepared. Cyclic voltammetry and galvanostatic charge-discharge tests showed that proper vanadium doping could improve the electrochemical performance of the material. The material which x=0.05 had better electrochemical performance,when charged-discharged in 2.5 ~4.2 V at 0.1 C,the initial specific discharge capacity was 15 1.1 mAh/g,the specific discharge capacity could maintain at about 104.4mAh/g at 10.0 C rate.