【摘要】 将沉淀转化法和无水乙醇法相结合,制备出绿色球形Ni(OH)2粉末。利用扫描电镜、X射线衍射仪及充电电池测试装置,对Ni(OH)2粉末的表面形貌、相结构和充放电性能进行了表征。扫描电镜形貌分析表明Ni(OH)2晶粒存在一定程度的微团聚,颗粒尺寸介于3~6μm之间,小于生产用氢氧化镍的8~12μm;X射线衍射结果表明Ni(OH)2的衍射峰强度降低、半高宽(FWHM)增大,晶型结构为β型;将该Ni(OH)2颗粒按3%(质量分数)与生产用氢氧化镍混合掺杂,所制备的混合颗粒Ni(OH)2正极的充电电位降低、放电电位升高,Ni(OH)2的平均比容量提高约20 mA.h/g。更多还原

【Abstract】 By combining precipitation conversion method and anhydrous ethanol method,a kind of green spherical Ni（OH）₂ powder was prepared.With the help of Cambridge S360 scanning electronic microscope,Philips APD10 X-ray diffraction apparatus and BS9380 secondary battery performance and life test device,the surface morphology,phase structure and charge-discharge performance of experimental Ni（OH）₂ powders were characterized.The results show that the particle size of experimental Ni（OH）₂ is 36μm,smaller than that of the employed production-line Ni（OH）₂（812μm）.SEM analysis exhibits that some crystal grains of experimental Ni（OH）₂ powders agglomerate to grow up to larger ones.XRD spectrum indicates that its crystal structure is β type with lower diffraction intensity and higher full width of half maximum intensity（FWHM）.When experimental Ni（OH）₂ was intermingled with employed production-line nickel hydroxide at a mass ratio of 3%,the mixed positive electrode displays a lower charge potential and higher discharge potential as well as an increase of 20mA·h/g in gravimetric capacity.更多还原