CAJ | 학술논문

以Fe2 O3为Fe源、 LiH2 PO4为Li源和P源、分别以聚乙烯醇（ PVA）、淀粉、柠檬酸为碳源，采用液相分散混合、雾化造粒及高温固相处理工艺制备得到碳包覆的磷酸铁锂正极材料（LiFePO4/C），考察不同有机碳源包覆改性对磷酸铁锂正极材料物理及电化学性能的影响。结果表明：以聚乙烯醇包覆制备的LiFePO4/C材料的首次放电比容量为153.8 mAh/g，首次效率大于90％，材料物相纯正，颗粒呈类球形均匀分布、无团聚现象；淀粉包覆的样品的比容量稍低，为144.4 mAh/g，柠檬酸包覆的产物的比容量最低，为139.4 mAh/g。
이Fe2 O3위Fe원、 LiH2 PO4위Li원화P원、분별이취을희순（ PVA）、정분、저몽산위탄원，채용액상분산혼합、무화조립급고온고상처리공예제비득도탄포복적린산철리정겁재료（LiFePO4/C），고찰불동유궤탄원포복개성대린산철리정겁재료물리급전화학성능적영향。결과표명：이취을희순포복제비적LiFePO4/C재료적수차방전비용량위153.8 mAh/g，수차효솔대우90％，재료물상순정，과립정류구형균균분포、무단취현상；정분포복적양품적비용량초저，위144.4 mAh/g，저몽산포복적산물적비용량최저，위139.4 mAh/g。
Using Fe2O3 and LiH2PO4 as raw materials, and polyvinyl alcohol (PVA), starch, citric acid as carbon source, respectively, the LiFePO4/C composite materials were prepared by a liquid phase mixing , spray granulation and high temperature solid phase process.The effects of different organic carbon source coating modifications on the physical and electrochemical properties of LiFePO 4/C cathode materials were investigated.The LiFePO4/C material coated by PVA had an initial discharge capacity of 153.8 mAh/g, and the first efficiency greater than 90%, while it had a pure phase , well-distributed spherical particles without agglomeration.However , the sample coated by starch had a lower capacity of 144.4 mAh/g and the citric acid coated sample only had a capacity of 139.4 mAh/g.