Effects of different electrolytes containing Na2WO4 on the electrochemical performance of nickel hydroxide electrodes for nickel-metal hydride batteries

Download
  1. Get@NRC: Effects of different electrolytes containing Na2WO4 on the electrochemical performance of nickel hydroxide electrodes for nickel-metal hydride batteries (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.ijhydene.2013.12.070
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleInternational Journal of Hydrogen Energy
ISSN0360-3199
AbstractTo improve the high-temperature performance of the nickel hydroxide electrodes in nickel-metal hydride batteries, sodium tungstate (Na2WO4) used as an electrolyte additive has been added into two types of binary electrolytes (KOH-LiOH and NaOH-LiOH) in this study. The effects of electrolyte composition on the electrochemical performance of nickel electrodes have been systematically investigated via a combination of cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), energy-dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and charge/discharge tests. It is found that by adding (1.0 wt.%) Na2WO4, the performance of nickel electrodes is significantly improved in both NaOH and KOH electrolytes at 70 °C. The improved performance can be attributed to the deposition of WO3·2H2O solid film on the surface of nickel electrode, which is beneficial to the increase in oxygen evolution overpotential, the slow-down of oxygen evolution rate and the decrease in charge-transfer resistance. © 2013 Hydrogen Energy Publications, LLC.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270813
Export citationExport as RIS
Report a correctionReport a correction
Record identifier64c163ce-7cb3-488b-905d-5f002f7f0e5e
Record created2014-02-17
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)