ELECTRODE AND MANUFACTURING METHOD THEREOF

• US 20140295293A1
• Filed: 03/24/2014
• Published: 10/02/2014
• Est. Priority Date: 03/27/2013
• Status: Abandoned Application

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: NIKAWA, Hidefumi, TOKUNE, Toshio
• Application Number:
  US14/222,840
• Publication Number:
  US 20140295293A1
• Time in Patent Office: Days
• US Class Current: 429/405
• CPC Class Codes: C01B 25/45 containing plural metal, or metal and ammonium
• CPC Class Codes: H01G 11/32 Carbon-based
• CPC Class Codes: H01G 11/36 Nanostructures, e.g. nanofibres, nanotubes or fullerenes
• CPC Class Codes: H01G 11/38 Carbon pastes or blends; Binders or additives therein
• CPC Class Codes: H01G 11/50 specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/054 Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
• CPC Class Codes: H01M 12/08 composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/139 Processes of manufacture
• CPC Class Codes: H01M 4/5825 Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• CPC Class Codes: H01M 4/625 Carbon or graphite
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

Provided is an electrode that contributes to higher performance improvement of batteries and capacitors by selecting a dispersant not only for uniformalizing an electrode structure but also playing the performance improvement role for the batteries or capacitors. An electrode 1 includes an active material 2 and a conductive additive 3. The electrode 1 also includes a dispersant 5, and the dispersant 5 is adsorbed onto the surfaces of the conductive additive 3 and the active material 2. More preferably, the electrode 1 includes the dispersant 5 having at least one kind selected from a group consisting of molecular structures, atoms, and ions which acts as a charge transfer medium, and most preferably, the electrode 1 includes the dispersant 5 having the same charge as the charge transfer medium contained in the active material 2.

Claims

1. An electrode comprising an active material and a conductive additive,

wherein the electrode also includes a dispersant, and

the dispersant is adsorbed onto surfaces of the conductive additive and the active material.

2. The electrode according to claim 1, wherein the dispersant includes a dispersant having at least one kind selected from a group consisting of molecular structures, atoms, and ions which acts as a charge transfer medium.

3. The electrode according to claim 2, wherein the charge transfer medium has the same charge as the charge transfer medium contained in the active material.

4. The electrode according to claim 3, wherein the charge transfer medium is the same as the charge transfer medium contained in the active material.

5. The electrode according to claim 4, wherein the dispersant is an anionic surfactant.

6. The electrode according to claim 5, wherein the dispersant is at least one kind selected from a group consisting of metal dodecyl sulfate, metal dodecyl benzene sulfonate, and metal stearate.

7. The electrode according to claim 6, wherein the dispersant is at least one kind selected from a group consisting of lithium dodecyl sulfate, sodium dodecyl sulfate, lithium dodecyl benzene sulfonate, sodium dodecyl benzene sulfonate, lithium stearate, and sodium stearate.

8. The electrode according to claim 1, wherein the conductive additive is at least one kind selected from a group consisting of carbon nanotubes, carbon black, acetylene black, and Ketjen black.

9. The electrode according to claim 8, wherein the carbon nanotubes include carbon nanotubes having metallic properties.

10. A secondary battery being provided with the electrode according to claim 1.

11. The secondary battery according to claim 10, wherein the secondary battery is a lithium-ion secondary battery.

12. The secondary battery according to claim 10, wherein the secondary battery is a sodium-ion secondary battery.

13. An air battery being provided with the electrode according to claim 1.

14. The air battery according to claim 13, wherein the air battery is a lithium/air battery.

15. The air battery according to claim 13, wherein the air battery is a sodium/air battery.

16. An electric double-layered capacitor being provided with the electrode according to claim 1.

17. The electric double-layered capacitor according to claim 16, wherein the electric double-layered capacitor is a lithium-ion capacitor.

18. The electric double-layered capacitor according to claim 16, wherein the electric double-layered capacitor is a sodium-ion capacitor.

19. A manufacturing method of an electrode, comprising:

a first process of preparing a dispersion liquid containing an active material, a conductive additive, a solvent, and a dispersant using a dispersant having at least one kind selected from a group consisting of molecular structures, atoms, and ions which acts as a charge transfer medium; and

a second process of manufacturing an electrode by removing only the solvent from the dispersion liquid.