【摘要】 本文报道了在氩气保护下用两段高温固相反应法制备NaVPO4F作为钠离子电池正极材料,并用傅立叶红外光谱(FT-IR),原子吸收光谱(AAS),热重分析(TG/DTG),X-射线衍射(XRD),扫描电镜(SEM),恒流充放电等对其结构和性能进行了测试和表征。结果表明:750℃左右反应可以获得稳定、结晶度好的NaVPO4F,其晶型为简单单斜晶系,与前驱体VPO4的晶型一致;SEM测试表明NaVPO4F的粒径分布均匀,粒径大小在微米级,材料首次放电容量为87mAh/g。更多还原

【Abstract】 In this paper,the cathode material of sodium-ion battery,NaVPO₄F,was prepared under the protection of argon atmosphere by two step high temperature solid-state method.The structure and performance of the prepared cathode material were characterized by Flourier-Infrared Spectra（FT-IR）,Atomic Absorption Spectra（AAS）,Thermogravimetric Analysis（TG/DTG）,X-ray Diffractometer（XRD）,Scanning Electron Microscope（SEM） and constant current charge/discharge test.The results show that NaVPO₄F with a good crystal stability can be obtained at about a temperature of 750 ℃.Its crystal structure was monoclinic,and it was in accordance with VPO₄ precursor.The SEM micrograph showed that the size of NaVPO₄F particle was micron-class,and the distribution of particle was uniform, the initial discharge capacity of the material was 87mAh/g.更多还原