PROTON-CONDUCTING POLYMER BATTERY

Abstract

An objective of this invention is to provide a proton-conducting polymer battery comprising an electrode containing a proton-conducting conductive compound as an active material and an aqueous electrolytic solution, which exhibits good battery properties and higher safety and higher reliability after reflow processing. There is provided a proton-conducting polymer battery in which protons are exclusively involved in charge/discharge, comprising a cathode, an anode, a separator and an electrolytic solution; wherein: the cathode and the anode are disposed facing each other via the separator in the electrolytic solution; electrode active materials in the cathode and/or the anode are selected from π-conjugated polymers and hydroxyl-containing polymers; and the electrolytic solution is an aqueous solution comprising sulfuric acid as an electrolyte and at least one of phosphoric acid and diphosphoric acid, wherein the concentration of the contained water is 65 wt % or less, and the concentration of the sulfuric acid is 3 wt % to 35 wt %.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of an elementary element in a proton-conducting polymer battery;

FIG. 2 is a cross-sectional view of a proton-conducting polymer battery with lead terminals; and

FIG. 3 is a cross-sectional view of a coin-type proton-conducting polymer battery.

Claims

1. A proton-conducting polymer battery in which protons are exclusively involved in charge/discharge, comprising a cathode, an anode, a separator and an electrolytic solution; wherein: the cathode and the anode are disposed facing each other via the separator in the electrolytic solution;electrode active materials in the cathode and/or the anode are selected from π-conjugated polymers and hydroxyl-containing polymers; andthe electrolytic solution is an aqueous solution comprising sulfuric acid as an electrolyte and at least one of phosphoric acid and diphosphoric acid, wherein the concentration of the contained water is 65 wt % or less, and the concentration of the sulfuric acid is 3 wt % to 35 wt %.

2. The proton-conducting polymer battery as claimed in claim 1, wherein the electrolytic solution comprises a water-soluble imidazole compound and/or a triazole compound

3. A proton-conducting polymer battery in which protons are exclusively involved in charge/discharge, comprising: a cathode and an anode, at least one of which contains an electrode active material selected from π-conjugated polymers and hydroxyl-containing polymers;a separator interposed between the cathode and the anode; andan electrolytic solution in which the cathode, the anode, and the separator are placed, said electrolytic solution having reflow-processing stability and being an aqueous solution consisting essentially of: (i) sulfuric acid as an electrolyte;(ii) at least one of phosphoric acid or diphosphoric acid;(iii) water; and(iv) optionally a water-soluble imidazole compound and/or a triazole compound.

4. The proton-conducting polymer battery as claimed in claim 3, wherein the electrolytic solution contains the sulfuric acid in an amount of 3 wt % to 35 wt % and the water in an amount of 65 wt % or less.

5. The proton-conducting polymer battery as claimed in claim 3, wherein the electrolytic solution contains the water-soluble imidazole compound and/or the triazole compound.