(1. 浙江大学 化学系， 杭州 310027；
2. 中国科学院 金属研究所
金属腐蚀与防护国家重点实验室， 沈阳 110015)
摘 要: 采用络合沉淀、 并行低速加料法制备了Al取代和Al与Zn复合取代α-Ni(OH)2样品， 研究了其结构、 表面形貌和电化学性能。 结果表明：用该种方法制备的α-Ni(OH)2颗粒呈规则的球形且表面粗糙;与Al单独取代α-Ni(OH)2相比， Al与Zn复合取代α-Ni(OH)2颗粒的球形度和活化性能有所降低， 放电电位和循环稳定性有所提高。 α-Ni(OH)2的红外光谱、 X射线衍射及样品电极的电化学阻抗谱测试结果表明， 复合添加Al和Zn提高了氢氧化镍的结构稳定性， 降低了颗粒的微晶尺寸和电极反应的电荷转移电阻。
关键字: α-Ni(OH)2； 结构； 表面形貌； 电化学性能
（1. Department of Chemistry,
Zhejiang University, Hangzhou 310027, China;
2. State Key Laboratory for Corrosion and Protection,
Institute of Metal Research, The Chinese Academy of Sciences,
Shenyang 110015, China）
Abstract:Al-substituted α-Ni(OH)2, Al and Zn co-substituted α-Ni(OH)2 were prepared by a complexation precipitation and parallel slow feeding method, and their structure, morphology and electrochemical performance were studied. The experimental results show that the α-Ni(OH)2 particles display spherical shape and rough surface. The sphericity and activation performance of Al and Zn co-substituted α-Ni(OH)2 are lower than those of Al-substituted α-Ni(OH)2, however, the half discharge potential and the cycling stability are higher. The results of Fourier transform infrared spectroscopy (IR), X-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS) show that the co-doping of Al and Zn increases the structural stability and decreases the crystallite size and the charge transfer resistance.
Key words: α-Ni(OH)2； structure； morphology； electrochemical performance
