Acta Phys. -Chim. Sin. ›› 2000, Vol. 16 ›› Issue (05): 454-458.doi: 10.3866/PKU.WHXB20000516

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AC Impednce Study of the Aqueous Zn/V2O5 Secondary Battery

Zhou Jia-Hong, Xue Kuan-Hong, Sun Dong-Mei, Xu Shi-Min, Kong Jing-Lin   

  1. Department of Chemistry,Nanjing Normal University,Nanjing 210097
  • Received:1999-08-09 Revised:1999-10-18 Published:2000-05-15
  • Contact: Xue Kuan-Hong

Abstract:

The dependence of charge transfer resistances of electrodes in the aqueous Zn/V 2O 5 secondary battery on the Zn 2+ amount intercalated was studied by means of AC impedance experiments. The results showed that the electrode reaction on cathode was controlled by the diffusion of Zn 2+ at the beginning of the discharge process. With the increase of Zn 2+ amount intercalated into the cathode, the reaction became a kinetic controlled process, i.e.a process controlled by intercalation of Zn 2+ in V 2O 5.

Key words: Secondary battery, Zinc battery, V2O5, Impedance