您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 3    June 2005

[PDF Download]    [Flash Online]

    

Effect of preparation conditions on properties of Al-substituted α-Ni(OH)2 prepared by homogeneous precipitation
ZHANG Qian(张 倩)1, XU Yan-hui(徐艳辉)1, 2
WANG Xiao-lin(王晓琳)1, HE Guo-rong(何国荣)1

1. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China; 
2. Fuel Science Laboratory Faculty of Mechanic Engineering and Production, 
Hamburg University of Applied Sciences, 20099, Hamburg, Germany

Abstract: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.

 

Key words: homogeneous precipitation method; α-Ni(OH)2; Ni/MH batteries; electrochemical performance

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn