摘要
在相同的物理化学条件、不同晶化时间的条件下,采用化学沉淀法制备球形氢氧化镍晶体并应用SEM技术分别考察制得样品的形貌。研究表明:在相同的物理化学条件下,随着晶化时间的增加,样品的微观形貌由不规则状晶体变为完整的球状晶体。结合XRD表征结果分析得出:(001)晶面在晶化时间达到3 h时生长到了一个稳定的状态,并不随着晶化时间的增加而有明显的变化,但(100)与(101)晶面随晶化时间的增加继续生长,当晶化时间达到12 h时氢氧化镍的相对结晶度最大,(100)与(101)衍射峰强度高且峰形尖锐,说明氢氧化镍晶体的结构规整性增强。本文还讨论了氢氧化镍生长结晶过程中晶面选择性生长对晶体形貌及电化学性能的影响。
The spherical nickel hydroxide was synthesized by chemical precipitation method under the same physical and chemical conditions but different aging times. The morphologies of the spherical nickel hydroxide were characterized by SEM. It was found that with the increase of the aging time, the morphology of the spherical nickel hydroxide changed from irregular crystals to regular spherical crystals. XRD patterns showed that when the aging time was 3 h, the growth of （001） crystal plane reached a steady state, and it did not transform with the increase of the aging time. However, （100） crystal plane and （101） crystal plane continued to grow with the increase of the aging time, and the relative crystallinity reached a maximum value. The shapes of the diffraction peaks were sharp and high when the aging time was 12 h, which indicated that the structural regularity strengthened. The influence of crystal growth direction selectivity on the morphology and electrochemical activity were discussed in the crystallization process of spherical nickel hydroxide.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2017年第2期354-360,共7页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金云南联合重点基金(No.U1402271,U1202274)资助项目
关键词
球形氢氧化镍
晶面
衍射峰
相对结晶度
spherical nickel hydroxide
crystal plane
diffraction peak
relative crystallinity
