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Research on Chemical Intermediates

, Volume 32, Issue 5, pp 483–490 | Cite as

Solid-state metal hydride secondary batteries using heteropolyacid hydrate as an electrolyte

  • Hiroki Sakaguchi
  • Keisuke Hatakeyama
  • Taku Yamaguchi
  • Hirosh Inoue
  • Chiaki Iwakura
  • Takao Esaka
Article
  • 38 Downloads

Abstract

In order to enhance the performance of a solid-state MnO2-metal hydride battery using H3PMo12O40 · 20H2O as an electrolyte, a moderate amount of the electrolyte was added to both positive and negative electrodes. The high rate characteristics of the battery were improved significantly by optimizing the electrolyte content in the electrodes; the resulting battery was able to operate over 140 cycles, even at a current density of 20 mA/g alloy, which is large enough for the batteries using inorganic solid electrolytes, and keep the discharge efficiency about 90%. The improvement of battery performance appears to be caused by an increase in electrode-electrolyte interface area. The AC impedance analyses revealed that the resistance of interface is decreased by the addition of a suitable amount of the electrolyte, suggesting an increase in the interface area.

Keywords

Metal hydride battery heteropolyacid hydrate H3PMo12O40 · nH2solid-state battery solid electrolyte secondary battery 

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Copyright information

© VSP 2006

Authors and Affiliations

  • Hiroki Sakaguchi
    • 1
  • Keisuke Hatakeyama
    • 1
  • Taku Yamaguchi
    • 1
  • Hirosh Inoue
    • 2
  • Chiaki Iwakura
    • 2
  • Takao Esaka
    • 1
  1. 1.Department of Materials Science, Faculty of EngineeringTottori UniversityTottoriJapan
  2. 2.Department of Applied Chemistry, Graduate School of EngineeringOsaka Prefecture UniversityOsakaJapan

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