摘要
采用均匀络合共沉淀法，用 Ａｌ部分替代Ｎｉ，选择合适的成球剂，合成分子式为Ｎｉ０．８Ａｌ０．２（ＯＨ）２·（ｎ－ｘ）Ｈ２Ｏ·ｘＮＨ３的亚微米级球形α－Ｎｉ（ＯＨ）２。并采用Ｘ射线衍射（ＸＲＤ）、差热技术、扫描电镜和傅立叶变换红外（ＦＴＩＲ），对其结构以及相组成进行研究。电化学测试表明：制得的亚微米级球形α－Ｎｉ（ＯＨ）２与普通的α－Ｎｉ（ＯＨ）２和球形β－Ｎｉ（ＯＨ）２相比。具有电化学比容量高、活性物质利用率高和循环可逆性好等优点。
Submicronic spherical compounds of formula Ni0.8Al0.2 (OH)2·(n-x)H2O·xNH3, having the same structure as that of α-Ni(OH)2, were synthesized with method of homogeneous complexing co-precipitation by substituting nickel with aluminum and using appropriate conglobating reagent. The structure, morphology and composition of the compounds were investigated by X-ray diffraction, thermogravimetry, scanning electron microscopy and Fourier transform infrared spectroscopy. The electrode comprising the prepared α-Ni(OH)2 had greater specific capacity and higher utilization of active material than the ordinary α-Ni(OH)2 and β-Ni(OH)2 electrode. Cyclic voltammetry results showed that the compound had better reversibility.
出处
《电池》
CAS
CSCD
北大核心
2001年第3期107-109,共3页
Battery Bimonthly
关键词
均匀络合共沉淀法
亚微米级球形α-Ni(OH)2
电化学比容量
镍电池
homogeneous complexing co-precipitation method
submicronic spherical α-Ni(OH)2
electrochemical specific capacity
cyclic reversibility
