球形氢氧化镍的制备及其电化学性能研究

发布时间：2018-04-28 19:08

本文选题：超声波沉淀法 + 球形氢氧化镍　；参考：《现代化工》2017年07期

【摘要】：为了考察Ni(OH)_2颗粒粒径与形貌对镍电极性能的影响,利用超声波沉淀法制备出了粒径小且分布均匀的球形氢氧化镍,研究了反应体系中超声波强度对氢氧化镍颗粒形貌的影响。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、粒度分析、循环伏安特性曲线、倍率充放电技术对制备的氢氧化镍材料进行表征与测试。结果表明,超声波强度对氢氧化镍颗粒形貌有显著影响,实验确定适宜的超声波强度在216 W左右;粒度分析显示制备的球形氢氧化镍颗粒粒度在10μm左右。XRD测试证明制备的氢氧化镍为β-Ni(OH)_2;循环伏安特性曲线和倍率充放电测试发现,该材料具有良好的循环保持率,在0.4 C充电3 h,静置3 min,1 C放电至1.2 V的测试条件下循环30次后循环保持率为89%,最大放电比容量达260 m Ah/g。
[Abstract]:In order to investigate the effect of particle size and morphology of Ni(OH)_2 particles on the properties of nickel electrode, spherical nickel hydroxide with small particle size and uniform distribution was prepared by ultrasonic precipitation method. The effect of ultrasonic intensity on the morphology of nickel hydroxide particles in the reaction system was studied. The prepared nickel hydroxide material was characterized and tested by scanning electron microscope (SEM), SEM, particle size analysis, cyclic voltammetry characteristic curve and rate charge / discharge technique. The results show that the ultrasonic intensity has a significant effect on the morphology of nickel hydroxide particles, and the suitable ultrasonic intensity is about 216 W. The particle size analysis showed that the spherical nickel hydroxide particle size was about 10 渭 m. XRD test showed that the prepared nickel hydroxide was 尾 -NiOH-2, and the cyclic voltammetry curve and charge / discharge test showed that the material had a good cycle retention rate. After charging at 0.4 C for 3 h, the cycle retention rate is 89 after 30 cycles, and the maximum discharge specific capacity is 260 m / g.
【作者单位】：昆明理工大学冶金与能源工程学院;昆明冶金研究院;
【基金】：国家自然科学基金(51374118) 云南省创新引导与科技型企业培育计划(2015FB126)
【分类号】：TQ138.13

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