双碳源制备高性能Na3V2(PO4)3/C正极材料

High-performance NaV(PO)/C Cathode Materials Prepared Using Double Carbon Sources

以聚丙烯酸和葡萄糖为双碳源,通过碳热还原法制备颗粒分散性良好的Na3V2(PO4)3/C复合材料。借助聚丙烯酸长链分子对原料前驱体的良好分散性和葡萄糖热解碳的高导电性,获得的Na3V2(PO4)3/C作为钠离子电池正极材料,表现出高的倍率放电容量和长循环寿命。在5C倍率下循环1000次后放电容量剩余101 m Ah·g-1,容量保持率为92.6%。本文的双碳源策略为制备高性能电极材料提供了一个可行的途径。

Well-dispersed Na3 V2(PO4)3/C composite materials were prepared by carbon-thermal reduction method with poly(acrylic acid)and glucose as double carbon sources.The Na3 V2(PO4)3/C cathode for sodium-ion batteries displays large rate discharge capacities and long cycling life span,which can be attributed to the good precursor dispersion and electronic conductivity resulted from poly(acrylic acid)and glucose respectively.The discharge capacity can remain 101 m Ah·g-1 after 1000 cycles at 5 C with a capacity retention of 92.6%.This paper provides a beneficial strategy for preparation of high-performance electrode materials.