【摘要】 在化学共沉淀法的基础上采用喷涂技术制备镍铝层状双氢氧化物,对产物进行了结构表征和物理性能测试,并用作正极活性物质制备锌镍实验电池,考察了电池的充放电性能。结果表明,合成样品晶型结构为单一a相,颗粒形貌呈不规则角块状,比表面积达到14.1m2/g,平均粒径为18.38mm。与球形b-Ni(OH)2正极锌镍电池相比,实验电池的循环稳定性、放电容量和电压平台均有明显提高,1C倍率充放电120次循环平均比容量达到287.4mAh/g,放电中值电压达到1.688V。更多还原

【Abstract】 Ni-Al layered double hydroxides were prepared with spray technique on the base of chemical co-precipitation.The structure of the product was analyzed and the physical properties were tested.Moreover,it was used as cathode active material to manufacture Zn-Ni cell,and then the charge-discharge performance was studied.The experimental results show that the sample has single a phase crystal structure and irregular particle morphology.Its specific surface area reaches 14.1 m2/g and the average particle size is 18.38 mm.The cell has obviously better cycle stability,higher discharge capacity and voltage plateau than that with spherical b-Ni(OH)2 cathode.The average discharge capacity reaches 287.4 mAh/g within 120 cycles at 1 C rate,and the median discharge voltage attains 1.688 V.更多还原