球形Ni(OH)2包覆钴化合物的积分进料工艺

为提高镍电极活性材料之间的导电性，在电极制作过程中需添加适量的导电剂，通过混合式工艺添加的导电剂，其利用率和分布均匀性受工艺条件的限制，得不到可靠的保证。提出了一种积分进料的工艺方法，在球形Ni(OH)2的表面包覆上了一层钴的化合物；并利用扫描电子显微技术（SEM）对包覆效果进行了分析和研究，对积分进料工艺进行了结晶学方面的分析，提出了积分进料工艺的数学模型。结果表明，包覆层分布均匀、稳定；使用改性后材料制备的镍电极，其电阻降低，活性材料的利用率提高，大电流充放电性能得到了明显的改进。

Integral feeding technique for coating spherical Ni(OH)2 particles withcobalt compounds

High electrical conductivity mateials are added to the nickel cathode during manufacturing but the blend technique does not provide uniformity and or a reliable utilization factor of the additional material. In the present work, the surface of the Ni(OH) 2 grains was micro encapsulated with a layer of cobalt compounds using a novel integral feeding technique. The technique was investigated using the theory of crystal growth to develop a mathematical model. Analysis of the samples using SEM shows that the coated layer is well distributed on the surface of the Ni(OH) 2 grains and is stable. The utilization factor of the active materials and the charge discharge efficiency of the nickel cathode using the cobalt coated Ni(OH) 2 are obviously improved.