含部分晶须的镍酸锂研制

Study on LiNiO_2 containing a fraction of whiskers

以碳酸锂、氢氧化镍和硝酸为原料,采用半固相法合成了镍酸锂,并研究了合成条件和合成工艺对产物性能的影响.用DSC-TG对试样的热行为进行分析,并分别用SEM和XRD对材料的微观结构和物相组成进行表征.结果表明:烘干温度控制在250℃;以5℃/min从25℃升温至620℃;并且在620℃下煅烧9 h,此时获得的样品中有约60%的晶须存在,晶须的直径小于0.3μm,晶须的长度约为4～6μm.

Taking lithium carbonate,nickel hydroxide and nitric acid as raw materials,LiNiO2 was synthesized by half solid-state reaction,and influences of synthesis condition and synthesis process on performance of product were investigated.The thermal behaviors of the samples were analyzed by DSC-TG,and the microstructure and phase composition of the samples were characterized by SEM and XRD respectively.The results show that the thus-obtained samples has 60% whiskers with a diameter less than 0.3um and a length about 4～6um,when they were prepared at the condition of 250℃ drying temperature,heating from 25℃ to 620℃ with a heating rate of 5℃ / min,and calcinated at 620℃ for 9 hours.