Modified electroconductive polymer material and method for preparation thereof
Disclosed is a modified electroconductive polymer material, which comprises a metal filled in a space between the chains of an electroconductive polymer. The metal is oxidized (partially formed as a hydroxide) through a chemical reaction between three substances consisting of the metal, a cation radical/dication, and absorbed water. The metal has a work function less than that of the electroconductive polymer. The contact between the metal and the electroconductive polymer is kept in the state of coexistence between three substances consisting of the metal, the cation radical/dication and the absorbed water. This allows an electroconductive polymer material to have enhanced durability against oxidation/reduction, and controlled conductivity.
1. A method for producing a modified electroconductive polymer material comprising
an electroconductive polymer; and
a metal oxide filled in a space between chains of said electroconductive polymer,
said metal being oxidized through a galvanic corrosion reaction between three substances consisting of a metal, a cation radical/dication in the electroconductive polymer, and absorbed water,
said method comprising the steps of:
allowing an electroconductive polymer and a metal having a work function less than that of said electroconductive polymer to be brought into contact with one another;
keeping the contact between said metal and said electroconductive polymer, under the presence of absorbed water, so as to create the state of coexistence and forming a galvanic battery between three substances consisting of said metal, a cation radical/dication in the electroconductive polymer and said absorbed water; and
entering a formed metal oxide/hydroxide into the electroconductive polymer, and diffusingly moving therein to reside in nano-space between chains of said electroconductive polymer,
wherein said step of allowing said electroconductive polymer and said metal to be brought into contact with one another includes:
forming on a substrate a film made of an electroconductive polymer;
vapor-depositing on a surface of said film a metal having a work function less than that of said electroconductive polymer; and
penetrating the absorbed water into the electroconductive polymer through the microvoid, micro-scratch or pinhole.
2. A method for producing a modified electroconductive polymer material comprising
an electroconductive polymer; and
a metal oxide filled in a space between chains of said electroconductive polymer,
said metal being oxidized through a galvanic corrosion reaction between three substances consisting of a metal, a cation radical/dication in the electroconductive polymer, and absorbed water,
said method comprising the steps of:
allowing an electroconductive polymer and a metal having a work function less than that of said electroconductive polymer to be brought into contact with one another;
keeping the contact between said metal and said electroconductive polymer, under the presence of absorbed water, so as to create the state of coexistence and forming a galvanic battery between three substances consisting of said metal, a cation radical/dication in the electroconductive polymer and said absorbed water;
entering a formed metal oxide/hydroxide into the electroconductive polymer, and diffusingly moving therein to reside in nano-space between chains of said electroconductive polymer; and
further comprising a reducing reaction induced by adding a negative ion.
3. The method as defined in claim 2 , wherein said negative ion is at least one selected from the group consisting of ClO 4 − , BF 4 − , PF 6 − and para-toluene sulfonate ion.
4. A method for producing a modified electroconductive polymer material comprising
an electroconductive polymer; and
a metal oxide filled in a space between chains of said electroconductive polymer,
said metal being oxidized through a galvanic corrosion reaction between three substances consisting of a metal, a cation radical/dication in the electroconductive polymer, and absorbed water,
said method comvrising the steps of:
allowing an electroconductive polymer and a metal having a work function less than that of said electroconductive polymer to be brought into contact with one another;
keeping the contact between said metal and said electroconductive polymer, under the presence of absorbed water, so as to create the state of coexistence and forming a galvanic battery between three substances consisting of said metal, a cation radical/dication in the electroconductive polymer and said absorbed water; and
entering a formed metal oxide/hydroxide into the electroconductive polymer, and diffusingly moving therein to reside in nano-space between chains of said electroconductive polymer;
wherein said metal is contacted with said electroconductive polymer in an inhomogeneous pattern.
5. A method for
producing a modified electroconduetive polymer material comprising
an electroconductive polymer; and
a metal oxide filled in a space between chains of said electroconductive polymer,
said metal being oxidized through a galvanic corrosion reaction between three substances consisting of a metal, a cation radical/dication in the electroconductive polymer, and absorbed water,
said method comprising the steps of:
allowing an electroconductive polymer and a metal having a work function less than that of said electroconductive polymer to be brought into contact with one another;
keeping the contact between said metal and said electroconductive polymer, under the presence of absorbed water, so as to create the state of coexistence and forming a galvanic battery between three substances consisting of said metal, a cation radical/dication in the electroconductive polymer and said absorbed water; and
entering a formed metal oxide/hydroxide into the electroconductive polymer, and diffusingly moving therein to reside in nano-space between chains of said electroconductive polymer;
wherein said metal contacted with said electroconductive polymer has a structural defect.
6. The method as defined in claim 5 , wherein said structural defect is at least one selected from the group consisting of a micro-void, micro-scratch and a pinhole.
7. A method for producing a modified electroconductive polymer material comprising
an electroconductive polymer; and
a metal oxide filled in a space between chains of said electroconductive polymer,
said metal being oxidized through a galvanic corrosion reaction between three substances consisting of a metal, a cation radical/dication in the electroconductive polymer, and absorbed water,
said method comprising the steps of:
allowing an electroconductive polymer and a metal having a work function less than that of said electroconductive polymer to be brought into contact with one another;
keeping the contact between said metal and said electroconductive polymer, under the presence of absorbed water, so as to create the state of coexistence and forming a galvanic battery between three substances consisting of said metal, a cation radical/dication in the electroconductive polymer and said absorbed water; and
entering a formed metal oxide/hydroxide into the electroconductive polymer, and diffusingly moving therein to reside in nano-space between chains of said electroconductive polymer;
wherein said metal is brought into contact with said electroconductive polymer by a deposition process selected from the group consisting of vapor deposition, a sputtering process, a plating process, an electrodeposition process and an electron beam process.