摘要
Al-substituted α-Ni（OH）2 was synthesized under different reaction conditions by a homogeneous precipitation method. The effect of reaction temperature, reaction time, Ni and Al ions concentration and reagent ratio on the physico-chemical properties and electrochemical performance of Al-substituted α-Ni（OH）2 was studied. The Al-substituted α-Ni（OH）2 samples were characterized by X-ray diffractometry（XRD）, infrared spectrometry（FT-IR）, inductively coupled plasma（ICP）, thermogravimetry（TG） and electrochemical test. The results reveal that the physico-chemical properties and electrochemical performance of the sample are influenced strongly by the preparation conditions. Keeping reaction temperature at 100 or 104℃ is appropriate and the largest specific discharge capacity of the sample is 320mA·h/g. With the reaction time increasing, the discharge capacity increases first and then decreases slightly. It is appropriate that the Ni and Al ions concentration and the ratio of urea to Ni and Al ions are 0.42mol/L and 0.75∶1, respectively.
Al-substituted α-Ni(OH)_2 was synthesized under different reaction conditions by a homogeneous precipitation method. The effect of reaction temperature, reaction time, Ni and Al ions concentration and reagent ratio on the physico-chemical properties and electrochemical performance of Al-substituted α-Ni(OH)_2 was studied. The Al-substituted α-Ni(OH)_2 samples were characterized by X-ray diffractometry(XRD), infrared spectrometry(FT-IR), inductively coupled plasma(ICP), thermogravimetry(TG) and electrochemical test. The results reveal that the physico-chemical properties and electrochemical performance of the sample are influenced strongly by the preparation conditions. Keeping reaction temperature at 100 or 104℃ is appropriate and the largest specific discharge capacity of the sample is 320mA·h/g. With the reaction time increasing, the discharge capacity increases first and then decreases slightly. It is appropriate that the Ni and Al ions concentration and the ratio of urea to Ni and Al ions are ~0.42mol/L and ~0.75∶1, respectively.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2005年第3期653-660,共8页
Transactions of Nonferrous Metals Society of China
基金
Project(2003CB615701)supportedbytheNationalBasicResearchProgramofChina
关键词
同源沉淀法
氢氧化镍
镍锰电池
点化学性质
homogeneous precipitation method
α-Ni(OH)_2
Ni/MH batteries
electrochemical performance
