球形Ni(OH)_2包覆钴化合物的积分进料工艺  

Integral feeding technique for coating spherical Ni(OH)_2 particles with cobalt compounds

作　　者：杜晓华[1] 张泉荣[1] 姜长印[1] 万春荣[1] 严玉顺[1] 

机构地区：[1]清华大学核能技术设计研究院,北京102201

出　　处：《清华大学学报（自然科学版）》2001年第6期71-74,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目 (715 -0 0 4-0 2 3 4 ); ;及清华大学实验室开放基金资助 (THSJZ)

摘　　要：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 。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.

关 键 词：积分进料工艺 表面改性 碱性充电电池 球形镍包覆钴化合物 

分 类 号：TM911.11[电气工程—电力电子与电力传动]