Abstract: Lithium heteropoly blue(Li₅PW₁₀^ⅥW₂^ⅤO₄₀) was used as a non-aqueous electrolyte in the polyacenic semiconductor (PAS)-Li secondary battery instead of LiClO₄. The properties of the PAS-Li secondary battery, especially the effect of Li₅PW₁₀^ⅥW₂^ⅤO₄₀ on the capacity, the cycle property and the self-discharging of the battery have been investigated. The results indicate that not only Li₅PW₁₀^ⅥW₂^ⅤO₄₀ can overcome the disadvantages of LiClO₄, which is apt to explode when heated or rammed, but also the PAS-Li secondary battery assembled with the novel electrolyte has a larger capacity and smaller self-discharging than that assembled with LiClO₄. Therefore, it is believed that lithium heteropoly blue is a better and novel electrolyte for the PAS secondary battery and exhibits significant and practical application.

Key words: Lithium heteropoly blue, Non-aqueous electrolyte, Polyacenic semiconductor, Secondary battery