纳米Ni(OH)_2的制备及其放电性能  

Preparation and discharge property of nano-scale nickel hydroxide

作　　者：刘小虹[1] 余兰[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《电池工业》2004年第3期145-148,共4页Chinese Battery Industry

摘　　要：以草酸和乙酸镍为原料,通过低热固相反应法合成的前驱体粉末,经X-射线衍射和红外光谱表征为二水合草酸镍。用此前驱体粉末与NaOH混合并充分研磨制得纳米Ni(OH)2粉末。经XRD、TEM测试表明,制得的纳米Ni(OH)2粉末为球形和针状粒子,平均粒径约8nm左右。以8%的比例将其掺杂到普通球形微米Ni(OH)2粉末中,制得纳米Ni(OH)2复合电极,经充电后表现出优异的放电性能,活性物质的利用率提高10%以上。Nano-scale Ni (OH) 2 powders were prepared through NiC 2 O 4 ·2H 2 O as precursors,which were synthesized by low-heating solid-s tate reaction with oxalic acid and ni ckel acetate and characterized by X-ray diffraction(XRD)and infrared spectrometry(IR).XRD and transmission electron microscopy(TEM)results showed that the shape of as-p repared Ni (OH) 2 particles was spherical and acicula r with the average diameter of 8nm.Electrochemical te st of constant current discharge pro ved that the nano-scale composite Ni (OH) 2 electrode with 8%nano-scale Ni (OH) 2 powders adulterated in common micro-scale Ni (OH) 2 powders had excellent discharge pro perty and the active material utiliz ation of Ni (OH) 2 could be raised by10%.

关 键 词：氢氧化镍 纳米材料 低热固相反应 放电性能 

分 类 号：TM912.2[电气工程—电力电子与电力传动]