| Structural characteristics of spherical Ni（OH）2 and its charge／discharge process mechanism |
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| 引用本文： | 彭美勋,沈湘黔,王零森,危亚辉.Structural characteristics of spherical Ni（OH）2 and its charge／discharge process mechanism[J].中南工业大学学报(英文版),2005,12(1):5-8. |
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| 作者姓名： | 彭美勋 沈湘黔 王零森 危亚辉 |
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| 作者单位： | [1]StateKeyLaboratoryofPowderMetallurgy,CentralSouthUniversity,Changsha410083,China／／ChangshaResearchInstituteofMineralandMetallurgy,Changsha410012,China [2]ChangshaResearchInstituteofMineralandMetallurgy,Changsha410012,China／／CollegeofMaterialsScienceandEngineering,JiangsuUniversity,Zhenjiang212013,China [3]StateKeyLaboratoryofPowderMetallurgy,CentralSouthUniversity,Changsha410083,China [4]ChangshaResearchInstituteofMineralandMetallurgy,Changsha410012,China |
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| 摘 要： | Spherical Ni(OH)2 particles were prepared by an aqueous solution precipitation route. The structure of spherical Ni(OH)2 was investigated by scanning electron microscopy and transmission electron microscopy and compared with that of traditional Ni(OH)2. The results show that the spherical nickel hydroxide consists of Ni(OH)2 spheres with a reticulate structure of platelet-like, which is almost arranged radially and the crystalline grains intervene and connect with each other to form a three-dimensional net. The spherical Ni(OH)2 particle is full of pores,crannies between cleave planes. It is supposed that this structure is beneficial to the structural stability for the spherical particles during the charge/discharge processes and can improve the cycle life of the electrode; the pores and the crannies in spherical particles can shorten the proton diffusion distance and speed its velocity, which may result in that the local polarization is lowered. The electrochemical performances of the spherical Ni(OH)2 are improved by enhancing the conducting properties of the crystalline lattice due to its quick proton diffusion.
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| 关 键 词： | 组织结构 结晶度 球形Ni（OH）2 质子扩散 |
| 收稿时间： | 10 May 2004 |
| 修稿时间： | 10 August 2004 |
Cerium enrichment on sinter skin of mischmetal doped WC-Co cemented carbide |
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| Zhang Li , Chen Shu , Xiong Xiang-jun , Huang Bai-yun and Zhang Chuan-fu.Cerium enrichment on sinter skin of mischmetal doped WC-Co cemented carbide[J].Journal of Central South University of Technology,2005,12(1):5-8. |
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| Authors: | Zhang Li Chen Shu Xiong Xiang-jun Huang Bai-yun and Zhang Chuan-fu |
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| Affiliation: | (1) State Key Laboratory of Powder Metallurgy, Central South University, 410083 Changsha, China;(2) Changsha Research Institute of Mineral and Metallurgy, 410012 Changsha, China;(3) College of Materials Science and Engineering, Jiangsu University, 212013 Zhenjiang, China |
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| Abstract: | Spherical Ni(OH)2 particles were prepared by an aqueous solution precipitation route. The structure of spherical Ni(OH)2 was investigated by scanning electron microscopy and transmission electron microscopy and compared with that of traditional
Ni(OH)2. The results show that the spherical nickel hydroxide consists of Ni(OH)2 spheres with a reticulate structure of platelet-like, which is almost arranged radially and the crystalline grains intervene
and connect with each other to form a three-dimensional net. The spherical Ni(OH)2 particle is full of pores, crannies between cleave planes. It is supposed that this structure is beneficial to the structural
stability for the spherical particles during the charge/discharge processes and can improve the cycle life of the electrode;
the pores and the crannies in spherical particles can shorten the proton diffusion distance and speed its velocity, which
may result in that the local polarization is lowered. The electrochemical performances of the spherical Ni(OH)2 are improved by enhancing the conducting properties of the crystalline lattice due to its quick proton diffusion.
Foundation item: Project (50134020) supported by the National Natural Science Foundation of China |
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| Keywords: | structure crystallinity spherical Ni(OH)2 proton diffusion charge/discharge process |
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