镍铝层状双氢氧化物正极锌镍电池充放电性能  

Charge-discharge performance of Zn-Ni cell with Ni-Al layered double hydroxides cathode

作　　者：杨建锋[1,2] 周震涛[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]深圳市迪凯特集团研发中心,广东深圳518118

出　　处：《电源技术》2011年第2期189-191,共3页Chinese Journal of Power Sources

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。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 α phase crystal structure and irregular particle morphology.Its specific surface area reaches 14.1 m^2/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.

关 键 词：镍铝层状双氢氧化物 锌镍电池 正极活性物质 充放电性能 

分 类 号：TM912.2[电气工程—电力电子与电力传动]