Process for producing highly carbonaceous materials and the highly carbonaceous material obtained

Patent metadata

Field	Value
Publication number	US-11214523-B2
Application number	US-201716344976-A
Country	US
Kind code	B2
Filing date	Oct 26, 2017
Priority date	Oct 28, 2016
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A process for the production of highly carbonaceous material, including combining a structured precursor including fibres and an unstructured precursor, in the form of a fluid, wherein the fluid has a viscosity of less than 45,000 mPa·s−1 at the temperature at which the combination step occurs, and including at least a cyclic organic or aromatic compound in the molten state, or in solution at a concentration by weight of less than or equal to 65%, in order to obtain a combined precursor corresponding to the structured precursor covered by the unstructured precursor, wherein the process further includes step of thermal and dimensional stabilization of the combined precursor in order to obtain fibres covered with a cyclic organic or aromatic compound deposit, and a step of carbonization of the fibres covered with a cyclic organic or aromatic compound deposit in order to obtain a highly carbonaceous material.

First claim

The invention claimed is:

1. A process for production of a highly carbonaceous material, wherein the process comprises combining a structured precursor comprising a fibre or a set of fibres and a unstructured precursor in the form of a fluid,
wherein the fluid has a viscosity that is greater than 500 mPa·s −1 and less than 45,000 mPa·s −1 at the temperature at which the combination step takes place, and comprises at least one cyclic organic or aromatic compound in the molten state or in solution at a concentration by weight of less than or equal to 65%,
wherein the at least one cyclic organic or aromatic compound has a weight percentage of carbon greater than 40% with a molecular weight greater that 500 g/mole,
wherein the combination step produces a combined precursor corresponding to the structured precursor covered by the unstructured precursor, wherein the process further comprises the following steps:
a step of thermal and dimensional stabilization of the combined precursor to produce a fibre or a set of fibres covered with a cyclic or aromatic organic compound deposit, and
a step of carbonization of the fibre or set of fibres covered with a cyclic or aromatic organic compound deposit to produce a highly carbonaceous material.

2. The process according to claim 1 , wherein the unstructured precursor comprises between 5% and 50% by weight of the at least one cyclic organic or aromatic compound.

3. The process according to claim 1 , wherein the fluid is an aqueous solution, an organic solution, or a mixture of both.

4. The process according to claim 1 , wherein the fluid is a melted material.

5. The process according to claim 1 , wherein the cyclic organic or aromatic compound has a molecular weight greater than 1000 g/mol.

6. The process according to claim 1 , wherein the unstructured precursor further comprises at least one additional compound selected from: metal fillers, carbon-rich compounds, and organic particles.

7. The process according to claim 6 , wherein the metal fillers comprise metals selected from the following metals: boron, silicon, germanium, arsenic, lithium, sodium, potassium, titanium, vanadium, manganese, iron, cobalt, nickel, molybdenum, aluminium and lead.

8. The process according to claim 6 , wherein the carbon-rich compounds are selected from the following compounds: activated carbon, natural anthracite, synthetic anthracite, carbon black, natural graphite or synthetic graphite.

9. The process according to claim 1 , wherein the structured precursor comprises a twisted multi-filament, a non-twisted multi-filament, a set of non-woven fibres, or a set of woven fibres.

10. The process according to claim 1 , wherein the structured precursor comprises cellulose fibres, hydrocellulose fibres, lignin fibres, pitch fibres or PAN fibres.

11. The process according to claim 1 , wherein the structured precursor and/or the unstructured precursor comprises carbonaceous nano-fillers, wherein the carbonaceous nano-fillers are present at a concentration between 0.0001% and 30% by weight.

12. The process according to claim 1 , wherein the combination step and thermal and dimensional stabilization step are repeated one or more times.

13. The process according to claim 1 , wherein the process further comprises a shaping step of the highly carbonaceous material.

14. The process according to claim 1 , wherein the process further comprises a graphitization step.

Assignees

• Arkema France

Inventors

• Korzhenko Alexander
• Mercader Célia

Classifications

• Y02E60/50

  Fuel cells · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/86

  Inert electrodes with catalytic activity, e.g. for fuel cells · CPC title

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title