摘要
Porous LiNiVO4 powder was synthesized via solution combustion synthesis method using lithium nitrate, nickel nitrate,ammonium metavanadate and citric acid as raw materials. Thermogravimetry (TG) and differential scanning calorimetry (DSC),X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy and transmission electron microscopy (TEM) were used toevaluate the structures and morphologies of samples. The results show that the calcination temperature has significant effect on thecrystallinity and morphologies. Pure LiNiVO4 flaky nanoparticles with a mean particle size around 20 nm can be readily prepared bycalcining the precursor in air at 500 °C for 2 h. As a cathode material for lithium-ion batteries, the porous LiNiVO4 powder exhibits agood structural reversibility.
以硝酸锂、硝酸镍、偏钒酸铵和柠檬酸为原料,采用溶液燃烧合成方法制备多孔LiNiVO_4粉末。采用热重-差示扫描量热法(TG-DSC)、X射线衍射技术(XRD)、傅里叶变换红外光谱(FT-IR)和透射电镜(TEM)对样品的结构和形貌进行表征。结果表明,煅烧温度对样品的结晶度和形貌有显著影响。将前驱体在空气中于500°C煅烧2 h可制备薄片型LiNiVO_4纳米颗粒,其颗粒尺寸约为20 nm。作为锂离子电池正极材料,多孔LiNiVO_4粉末具有较好的结构可逆性。
