摘要
介绍了一种通过合成草酸镍,进而生成β型纳米氢氧化镍的新的合成路线,从而达到大幅度提高镍氢电池正极放电容量的目的。使用X射线衍射（XRD）分析产品的晶型结构。从产品谱图中可以得知：由于特征衍射峰的出现可以判定该产品为β型,且由于（001）峰的宽化可以初步判定其为纳米级。通过透射电镜（TEM）可以看出产品粒径和形貌的具体特征,即产品为针状,长度为100～200 nm,直径为10～20 nm。将纳米级氢氧化镍制成电极,经过充放电测试可以发现电容量约为400 mA.h/g,远远高于球形微米级氢氧化镍的放电容量。
A new synthetic route was introduced,which adopted the synthesized nickel oxalate to produce β-type nickel hydroxide,so as to largely increase the discharge capacity of the cathode of nickel-hydrogen battery.The product′s crystal shape and structure were analyzed by XRD.The judgment could be made from the pattern that the product was β-type due to the appearance of characteristic diffraction peak.Moreover,the product could be preliminarily judged as nanometer grade,because of the widening of the peak（001）.The specific characteristics of the particle size and morphology could be seen through transmission electron microscope（TEM）,i.e.it was needle-like,100～200 nm in length and 10～20 nm of diameter.Through charge-discharge test,the electric capacity of the electrode made by nano-sized nickel hydroxide was 400 mA·h/g approximately,which was much higher than that made by sphere shaped micron grade nickel hydroxide.
出处
《无机盐工业》
CAS
北大核心
2007年第12期26-27,共2页
Inorganic Chemicals Industry
关键词
纳米
材料
氢氧化镍
电池
nano
material
nickel hydroxide
battery
