Enhanced electrochemical performance of high-density Al-substituted α-nickel hydroxide by a novel anion exchange method using NaCl solution

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1016/j.ijhydene.2014.11.150
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Name affiliation
  1. National Research Council of Canada. Energy, Mining and Environment
FormatText, Article
Journal titleInternational Journal of Hydrogen Energy
ISSN0360-3199
Volume40
Issue4
Pages1852–1858
SubjectAluminum; Cathodes; Cyclic voltammetry; Electric discharges; Infrared spectroscopy; Ions; Nickel; Scanning electron microscopy; Secondary batteries; X ray diffraction; Anion exchange; Anion-exchange methods; Cath-ode materials; Charge-discharge tests; Electrochemical activities; Electrochemical impedance; Electrochemical performance; Nickel hydroxides; Electrochemical impedance spectroscopy
Abstract
High-density Al-substituted α-nickel hydroxide with interlayer NO3 - for alkaline nickel-based rechargeable batteries has been synthesized using a polyacrylamide (PAM) assisted two-step drying method. In order to improve its electrochemical performance, Al-substituted α-Ni(OH)2 with interlayer NO3 - is modified by a simple anion exchange method using NaCl solution. The physical and electrochemical properties of the synthesized material are characterized by means of X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and a charge-discharge test. Compared with NO3 - intercalated α-Ni(OH)2 precursor, the resulting Cl- intercalated α-Ni(OH)2 samples possess more excellent electrochemical activities, including higher proton diffuse coefficient, lower electrochemical impedance, higher specific capacity, and better cyclic stability. Especially, it is also found that the introduction of Cl- can greatly accelerate the activation process of α-Ni(OH)2 electrodes.
Publication date
PublisherElsevier
LanguageEnglish
Peer reviewedYes
NPARC number21275737
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