Different additives-substituted alpha-nickel hydroxide prepared by urea decomposition

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	Different additives-substituted alpha-nickel hydroxide prepared by urea decomposition
	Y. L. Zhao; J. M. Wang; H. Chen; T. Pan; J. Q. Zhang; C. N. Cao
	2004
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	50 期号:1 页码:91-98
摘要	Pure Ni(OH)(2), Al-substituted, Co-substituted, Al and Co co-substituted alpha-Ni(OH)(2) were prepared by homogeneous precipitation from nickel nitrate solution in the presence of urea. The physical properties of the samples with different additives were examined by XRD and SEM. The XRD results show that the Ni(OH)(2) samples with different additives prepared by this method are typical a-phases. The SEM results show that the pure Ni(OH)(2) and Co-substituted sample display spherical particles with some degree of agglomeration. However, Al-substituted sample and Al and Co co-substituted sample are the aggregates of irregularly shaped particles. The results of galvanostatic charge-discharge experiments show that the addition of Co2+ decreases the discharge potential, but the addition of Al3+ and co-doping of Al3+ and Co2+ increase the discharge potential. The cycle stability of Al and Co co-substituted alpha-Ni(OH)(2) is obviously improved compared with Al-substituted alpha-Ni(OH)(2). The results of diffusion coefficient of proton (DH+) experiment show that the DH+ values at different depth of discharge (DOD) are increased markedly by the doping of Al3+ or the co-doping of Al3+ and Co2+ and decreased by the doping of Co2+. The electrochemical transfer resistance (R-t) value of Co-substituted sample increases at first and then decreases with the increase of DOD. However, R-t increases with the increase of DOD for other samples. (C) 2004 Elsevier Ltd. All rights reserved.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese state key lab corros & protect, shenyang 110015, peoples r china.;wang, jm (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;cncao@sun.zju.edu.cn
关键词	Homogeneous Precipitation Urea Alpha-nickel Hydroxide Electrochemical Performance Physicochemical Properties Alkaline Secondary Cells Electrode Materials Cobalt Addition Alpha-ni(Oh)(2) Batteries Beta-ni(Oh)(2) Performance
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35746
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. L. Zhao,J. M. Wang,H. Chen,et al. Different additives-substituted alpha-nickel hydroxide prepared by urea decomposition[J]. Electrochimica Acta,2004,50(1):91-98.
APA	Y. L. Zhao,J. M. Wang,H. Chen,T. Pan,J. Q. Zhang,&C. N. Cao.(2004).Different additives-substituted alpha-nickel hydroxide prepared by urea decomposition.Electrochimica Acta,50(1),91-98.
MLA	Y. L. Zhao,et al."Different additives-substituted alpha-nickel hydroxide prepared by urea decomposition".Electrochimica Acta 50.1(2004):91-98.