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Effects of Mm(NiCoAlMn)(5) hydrogen storage alloy coated with Ni-Co-P alloy by electroless plating on electrochemical properties of hydride electrodes
Alternative TitleTrans. Nonferrous Met. Soc. China
Sun, CW; Guo, ZC; Tang, ZY; Guo, HT
2003-08-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume13Issue:4Pages:938-942
AbstractThe effect of chemical plating with Ni-Co-P alloy on the properties of MH electrodes is investigated. The results show that the efficiency of storage alloy and the activation of MH electrode have been improved by introducing 1.74% cobalt in the Ni-Co-P alloy coating. The initial discharge capacity is 208 mAh/g, The maximum discharge capacity gets to 298.5 mAh/g. At the same time the cycle life of MH electrodes is improved. The discharge capacity of MH electrodes coated with Ni-Co-P is 88% of the maximum discharge capacity after 300 cycles. Whereas the discharge capacity of bare alloy electrodes retains 62% of the maximum capacity after 300 cycles. An increment of discharge capacity is mainly due to the superposition of the oxidation current of Co as well as improved efficiency of microcurrent collection. The effect of Ni-Co-P alloy coating by electroless plating on the kinetic properties of hydride electrode has been systematically investigated by electrochemical techniques. The results indicate that the kinetic properties of MH electrodes, including exchange current density, limiting current density, have been improved markedly. This improvement of kinetic properties leads to the decrease of the overpotential of anodic and cathodic polarization.; The effect of chemical plating with Ni-Co-P alloy on the properties of MH electrodes is investigated. The results show that the efficiency of storage alloy and the activation of MH electrode have been improved by introducing 1.74% cobalt in the Ni-Co-P alloy coating. The initial discharge capacity is 208 mAh/g, The maximum discharge capacity gets to 298.5 mAh/g. At the same time the cycle life of MH electrodes is improved. The discharge capacity of MH electrodes coated with Ni-Co-P is 88% of the maximum discharge capacity after 300 cycles. Whereas the discharge capacity of bare alloy electrodes retains 62% of the maximum capacity after 300 cycles. An increment of discharge capacity is mainly due to the superposition of the oxidation current of Co as well as improved efficiency of microcurrent collection. The effect of Ni-Co-P alloy coating by electroless plating on the kinetic properties of hydride electrode has been systematically investigated by electrochemical techniques. The results indicate that the kinetic properties of MH electrodes, including exchange current density, limiting current density, have been improved markedly. This improvement of kinetic properties leads to the decrease of the overpotential of anodic and cathodic polarization.
KeywordRare Earths Based Hydrogen-storage Alloys Electroless Ni-co-p Alloy Plating Mh-ni Battery
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
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Indexed BySCI
Language英语
WOS KeywordPHASE
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000184987700040
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Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5283
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Phys, Lab Solid State Ion, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
3.Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China
Recommended Citation
GB/T 7714
Sun, CW,Guo, ZC,Tang, ZY,et al. Effects of Mm(NiCoAlMn)(5) hydrogen storage alloy coated with Ni-Co-P alloy by electroless plating on electrochemical properties of hydride electrodes[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2003,13(4):938-942.
APA Sun, CW,Guo, ZC,Tang, ZY,&Guo, HT.(2003).Effects of Mm(NiCoAlMn)(5) hydrogen storage alloy coated with Ni-Co-P alloy by electroless plating on electrochemical properties of hydride electrodes.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,13(4),938-942.
MLA Sun, CW,et al."Effects of Mm(NiCoAlMn)(5) hydrogen storage alloy coated with Ni-Co-P alloy by electroless plating on electrochemical properties of hydride electrodes".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 13.4(2003):938-942.
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