混合晶相氢氧化镍的合成和性能研究  

Study on the preparation and performance of multiphase nickel hydroxide

作　　者：韩恩山[1] 康红欣[1] 魏子海[1] 张红柳[1] 

机构地区：[1]河北工业大学化工学院应用化学系,天津300130

出　　处：《电源技术》2007年第5期396-399,共4页Chinese Journal of Power Sources

摘　　要：氢氧化镍存在两种晶体形态,a-Ni(OH)2由于其有较好的比容量而受到人们的关注,但其不稳定性制约了它的应用。采用共沉淀的方法制备钴锰掺杂的氢氧化镍,对其进行X射线衍射(XRD)、红外光谱(IR)和扫描电子显微镜(SEM)分析可以看出,掺钴锰制备的氢氧化镍样品同时存在a-Ni(OH)2和b-Ni(OH)2,为微米级混合晶相氢氧化镍,层间存在较多的阴离子和结晶水。氢氧化镍的充放电测试表明混合晶相的氢氧化镍放电容量明显高于普通氢氧化镍的放电容量,膨胀率明显降低,是一种前景非常广阔的镍电极正极材料。The two polymorphs of the nickel hydroxide are denoted as α -Ni （OH）2andβ -Ni（OH）2.α -Ni （OH）2 has a higher discharge capacity than β-Ni（OH）2 and excessive experiments are carded out to study α-Ni （OH）2. However, the instability of the α -Ni （OH）2 makes it difficult to be used widely. Co/Mn-sub-nickel hydroxide was prepared by coprecipitated and was examined by XRD, SEM, IR. The results of XRD, SEM, IR show that beth α -Ni （OH）2and β -Ni （OH）2 appear simultaneously in the samples and the samples are spherical. There are some anion and water between the slabs. The charge-discharge curves indicate that the multiphase sample has a higher discharge capacity and a smaller swelling rate than the usual spherical nickel hydroxide, so it has the chance to be a good material in the nickel electrodes.

关 键 词：镍电极 比容量 微结构 混合晶相 

分 类 号：TM912.12[电气工程—电力电子与电力传动]