Method for the manufacture of electrode for energy-storage devices

• US 20050217998A1
• Filed: 03/24/2005
• Published: 10/06/2005
• Est. Priority Date: 09/25/2002
• Status: Active Grant

• Current Assignee: Powermers Inc.
• Original Assignee: Gen3 Partners, Inc.
• Inventors: Kogan, Sam, Shkolnik, Nik, Vasiljeva, Svetlana Viktorovna, Logvinov, Sergey Anatolijevich, Timonov, Alexander Mikhailovich, Pivunov, Dmitriy Ivanovich
• Granted Patent: US 7,563,354 B2
• Time in Patent Office: Days
• US Class Current: 205/58
• CPC Class Codes: C08G 12/06 Amines
• CPC Class Codes: H01G 11/86 specially adapted for electrodes carbonisation or activation of carbon for the manufacture of electrodes H01G11/34
• CPC Class Codes: H01G 9/0036 Formation of the solid electrolyte layer
• CPC Class Codes: H01M 4/0438 by electrochemical processing electroless electrochemical plating C23C18/54
• CPC Class Codes: H01M 4/0452 from solutions
• CPC Class Codes: H01M 4/0466 Electrochemical polymerisation
• CPC Class Codes: H01M 4/137 Electrodes based on electro-active polymers
• CPC Class Codes: H01M 4/606 containing aromatic main chain polymers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

Application of a redox polymer of the poly-[Me(R-Salen)] type onto a conducting substrate is accomplished by the method of electrochemical polymerization. Said polymerization is accomplished by supplying a voltage between the substrate (that serves as an anode) and a counter electrode (that serves as a cathode), with both of them being submerged into the electrolyte containing an organic solvent and the compounds capable of dissolving in said solvent. The process is accompanied by the production of electrochemically inactive (at concentrations of no less than 0.01 mol/l) ions within the range of potentials from −3.0 V to +1.5 V, and metal complex [Me(R-Salen)] dissolved at a concentration of no less than 5·10⁻⁵ mol/l, (where: Me is a transition metal having at least two different degrees of oxidation, R is an electron-donating substituent, Salen is a residue of bis-(salicylaldehyde)-ethylenediamine in Schiff'"'"'s base.

Claims

1. A method of manufacturing an electrode for energy-storage devices comprising:

applying a voltage in a pulse mode between a conducting substrate serving as a anode and a counter electrode service as a cathode, both electrodes being submerged into the electrolyte containing an organic solvent, compounds capable of dissolving in said solvent, which dissolution is accompanied by a production of electrochemically inactive ions at concentrations of no less than 0.01 mol/l within a range of potentials from −

3.0 V to +1.5 V, and of a metal complex [Me(R-Salen)] at a concentration of no less than 5·

10<sup>−

5</sup> mol/l, wherein;

Me is a transition metal having at least two different degrees of oxidation,

R is an electron-donating substituent,

Salen is a residue of bis-(salicylaldehyde)-ethylenediamine in Schiff'"'"'s base; and

growing a redox polymer of the poly-[Me(R-Salen)] type on the conducting substrate by electrochemical polymerization at the voltage applied between the anode and the cathode.

2. The method of claim 1, wherein a duration a pulse of the voltage in the pulse mode is from 1 s to 30 min with a pulse ratio being up to 3600.

3. The method of claim 1, wherein the conducting substrate is a conductive material electrochemically inactive within the range of potentials from −

3.0 V to +1.5 V.

4. The method of claim 3, wherein the conducting substrate is a carbon material.

5. The method of claim 3, wherein the conducting substrate is a carbon material with a metal coating.

6. The method of claim 3, wherein the conducting substrate is a metal having a high value of specific surface parameter.

7. The method of claim 3, wherein the conducting substrate is an electrically conductive polymer in the form of a film, a porous structure, or a solid foam.

8. The method of claim 1, wherein the organic solvent comprises acetonitrile, dimethyl ketone, or propylene carbonate.

9. The method of claim 1, wherein the compounds comprise salts of tetrabutyl ammonium, tetraethyl ammonium, and tetramethyl ammonium—

perchlorates, tetrafluotoborates, hexafluoro phosphates.

10. The method of claim 1, wherein the transition metal Me is selected from the group consisting of Ni, Pd, Co, Cu, Fe and combinations thereof.

11. The method of claim 1, wherein the electron-donating substituent R comprises CH₃O—

, C₂H₅O—

, HO—

, —

CH₃.

12. The method of claim 1, wherein growing the redox polymer on the substrate is occurring at a substrate potential no higher than the potential of nonreversible oxidation of the the redox polymer.

13. The method of claim 1, further comprising circulating the electrolyte while growing the redox polymer.