Supercapacitor characteristic of La-doped Ni（OH）2 prepared by electrodeposition
来源期刊：Rare Metals2009年第2期
论文作者：SHAO Guangjie,YAO Yue,ZHANG Shipin,and HE Pei College of Environmental and Chemical Engineering,Yanshan University; State Key Laboratory of Metastable Materials Science and Technology,Qinhuangdao ,China
文章页码：132 - 136
摘 要：Samples of lanthanum-doped nickel hydroxide were prepared by electrodeposition method. The structure and electrochemical properties of the samples were studied by X-ray diffraction and a home-made open three-electrode cell system,respectively. The results show that the deposition process of Ni（OH）2 and La（OH）3 is mainly controlled by electrochemical polarization,which makes it easy to form uniform fine crystals. In addition,La（OH）3 is not a separate phase and lanthanum ions are doped into Ni（OH）2 crystal lattices. When V（0.5 mol/L Ni（NO3）2）/V（0.25 mol/L La（NO3）3） was 9:1,the lanthanum-doped nickel hydroxide reached the highest discharge capability of 840 F/g with a good cyclic reversibility. The capability still retains 670 F/g when the discharge current reaches 1000 mA/g.
摘要：Samples of lanthanum-doped nickel hydroxide were prepared by electrodeposition method. The structure and electrochemical properties of the samples were studied by X-ray diffraction and a home-made open three-electrode cell system,respectively. The results show that the deposition process of Ni（OH）2 and La（OH）3 is mainly controlled by electrochemical polarization,which makes it easy to form uniform fine crystals. In addition,La（OH）3 is not a separate phase and lanthanum ions are doped into Ni（OH）2 crystal lattices. When V（0.5 mol/L Ni（NO3）2）/V（0.25 mol/L La（NO3）3） was 9:1,the lanthanum-doped nickel hydroxide reached the highest discharge capability of 840 F/g with a good cyclic reversibility. The capability still retains 670 F/g when the discharge current reaches 1000 mA/g.
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