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

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1016/j.ijhydene.2014.11.150
AuteurRechercher : ; Rechercher : ; Rechercher : ; Rechercher : ; Rechercher : ; Rechercher : ; Rechercher : 1; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada. Énergie, les mines et l'environnement
FormatTexte, Article
SujetAluminum; 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
Résumé
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.
Date de publication
Dans
  • International Journal of Hydrogen Energy 40, nº 4 (30 janvier 2015) : 1852–1858.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21275737
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Identificateur de l’enregistrement05162147-859a-4b6d-ab55-e8755f8f21f1
Enregistrement créé2015-07-14
Enregistrement modifié2020-04-22
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