High rate performance of surface metalized spherical nickel hydroxide via in situ chemical reduction

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DOIResolve DOI: http://doi.org/10.1016/j.electacta.2016.04.165
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TypeArticle
Journal titleElectrochimica Acta
ISSN0013-4686
Volume207
Pages2836
SubjectNickel hydroxide; Cathode materials; In-situ reduction; Surface modification; High rate capability
AbstractThe surface modified Ni(OH)₂ samples with Ni and Ni–cobalt (Ni–Co) layer, respectively, are prepared by an in-situ chemical reduction method using hydrazine hydrate as reductant and silver ion as activating agent. The samples are characterized by X-ray diffraction, energy dispersive spectroscopy, and scanning electron microscopy. As the Ni electrode cathode, the material is analyzed, and the electrochemical properties such as rate capability, cyclic voltammetry, and AC impedance are investigated. The results indicate that the metallization of the Ni(OH)₂ surface does not change the original morphologies and crystal structure of the sample. The in-situ reduced Ni–Co layer bonds tightly with the matrix, which increases the conductivity of Ni(OH)₂ particles, reduces the electrode polarization, lowers the charging voltage of the battery, and improves the reversibility of the electrode reaction of Ni(OH)₂. Moreover, it effectively increases the rate capability, energy density, and utilization rate of the active material of the Ni electrode.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
IdentifierS0013468616310179
NPARC number23000317
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Record identifierd68f971b-b2e6-4757-a9a1-504da727c345
Record created2016-07-06
Record modified2016-07-06
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