Method for production of manganese dioxide-based composite material
AssigneeMCD Technologies S.a r.l.
InventorScott Donne
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Abstract
A composite material includes electro-deposited manganese dioxide particles of up to 110 micron in size and in a form of γ-modification of manganese dioxide; and single-walled carbon nanotubes with a diameter of 1 to 2 nm and a length of 1 to 5 μm, wherein a content of the carbon nanotubes is 0.0001 to 0.1 wt % of the composite material. Optionally, the particles have an average size of about 40-60 microns. Optionally, the carbon nanotubes form a coating on a surface of the particles and extend inward from the surface. Optionally, the single-wall carbon nanotubes form a three-dimensional conductive network in the material.
Claims8
A method for producing a composite material, the method comprising:
- immersing anode and cathode in a tank filled with an electrolyte,
- wherein a mixture of aqueous solutions 0.1-1.5 M MnSO4 and 0.05-0.5 M H2SO4, as well as a suspension of single-wall carbon nanotubes, is used as the electrolyte;
- applying voltage to the anode and the cathode at a current density on the anode in a range of 10 to 100 A/m2 so to as to produce a reaction
- Anode(Ti):Mn2++2H2O→MnO2+4H++2e
- Cathode(Cu):2H++2e→H2
- depositing a γ-modification of manganese dioxide on the anode;
- evolving gaseous hydrogen on a cathode;
- capturing the carbon nanotubes in the electrolyte during manganese dioxide electrodeposition and delivered the carbon nanotubes to the anode so as to embed them in the manganese dioxide;
- removing the composite material from the anode;
- milling and sieving the composite material;
- and
- neutralizing the composite material.
A method for producing a composite material, the method comprising:
- combining a γ-modification of manganese dioxide and single-wall carbon nanotubes into the composite material,
- wherein the composite material is produced by anodic electrodeposition in an electrolyte containing aqueous solutions of manganese sulphate and sulphuric acid, as well as single-wall carbon nanotubes with a diameter of 1 to 2 nm and a length of 1 to 5 μm,
- wherein the composite material is produced by immersing anode and cathode in a tank filled with an electrolyte that includes a mixture of aqueous solutions 0.1-1.5 M MnSO4 and 0.05-0.5 M H2SO4, as well as a suspension of the single-wall carbon nanotubes;
- and
- applying voltage to the electrodes wherein the electrodeposit obtained on the anode is ground to the manganese dioxide particles with a size of 1 to 110 microns.
A method for producing a composite material, the method comprising:
- combining a γ-modification of manganese dioxide and single-wall carbon nanotubes into the composite material,
- wherein the composite material is produced by anodic electrodeposition in an electrolyte containing aqueous solutions of manganese sulphate and sulphuric acid, as well as single-wall carbon nanotubes,
- wherein the composite material is produced by immersing anode and cathode in a tank filled with an electrolyte;
- and
- applying voltage to the electrodes wherein the electrodeposit obtained on the anode is ground to the manganese dioxide particles, so as to produce the composite material that includes (1) manganese dioxide particles of up to 110 micron in size and in a form of γ-modification of manganese dioxide;
- and (2) single-walled carbon nanotubes with a diameter of 1 to 2 nm and a length of 1 to 5 μm, such that a content of the carbon nanotubes is 0.0001 to 0.1 wt % in the composite material.
Dependencies are inferred from the claim text.