Synthesis Of Sn-P/C Anode Composite And Sodium Storage Propeties

In this paper,the Sn/P composite and the Sn-P/C composite was prepared by high energy ball milling method.The effects of molar ratio of Sn and P,milling time,and composite reduction graphite oxide content on the structure and electrical properties of the materials were investigated.The results indicated that the alloy was produced by the Sn4P3 alloy with different molar ratio of Sn and P.There are some Sn and P remaining in the composite material.The sample with molar ratio of Sn to P which is 1?0.75 has the maximum initial reversible capacity,the capacity is 452 mAh/g,and it has the best cycle performance,the capacity remains 84.7%after50 charge-discharge cycle.With the increase of milling time,the sample has changing trend to amorphous form.The sample with ball milling for 10h has the maximum initial reversible capacity,the capacity is 469 mAh/g,the capacity remains 84.7%after 50 charge-discharge cycle.With the increase of the content of RGO,the diffraction peak of Sn₄P₃ in the sample is lower and with poor crystallinity.The sample with 10%RGO has the maximum initial reversible capacity,the capacity is 392 mAh/g,its capacity remains 88.5%after 50 charge-discharge cycle.