Surface-functionalized carbonaceous particles, methods of making, and applications of the same

Patent metadata

Field	Value
Publication number	US-12134561-B2
Application number	US-201917256076-A
Country	US
Kind code	B2
Filing date	Jun 27, 2019
Priority date	Jun 27, 2018
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

The present disclosure relates to surface-functionalized carbonaceous particles, optionally in agglomerated form, methods for making such surface-functionalized carbonaceous particles and their use, for example as conductive additives in battery electrodes. The surface-functionalized carbonaceous particles are for example obtainable by milling a non-graphitic carbon material, followed by subsequent functionalization through controlled oxidation. The surface-functionalized carbonaceous particles can be used as additive in battery electrodes. The disclosure also pertains to dispersions of such carbonaceous materials in a liquid medium and their use as, among others, conductive coatings. Polymer compounds filled with the surface-functionalized carbonaceous particles are also disclosed.

First claim

The invention claimed is:

1. A composition comprising surface-functionalized carbonaceous particles comprising:
a crystallographic L c value of less than about 14 nm; and
an oxygen content greater than about 0.6 wt %;
wherein the surface-functionalized carbonaceous particles are non-graphitic.

2. The composition of claim 1 , wherein the particles are further characterized by:
(i) a BET surface area greater than about 100 m 2 /g;
(ii) an oil absorption of less than about 500 m L/100 g;
(iii) an intraparticle pore volume of less than about 2 mL/g;
(iv) a total pore volume of less than about 3 mL/g; and
(v) a lead uptake of greater than about 2800 ppm.

3. The composition of claim 1 , wherein the particles are further characterized by:
(i) an oxygen content of more than about 0.6 wt %;
(ii) an aqueous dispersion comprising the particles, the aqueous dispersion having a pH below 5.5;
(iii) a BET SSA of between about 100 m 2 /g and about 500 m 2 /g;
(iv) a xylene density of between about 1.65 g/cm 3 and about 2.1 g/cm 3 ;
(v) an oil absorption of between about 70 and about 300 mL/100 g;
(vi) a lead uptake of between about 2500 ppm and about 40000 ppm; and
(vii) a 5 wt % mass loss by thermogravimetric analysis at an onset temperature of below about 580° C.

4. The composition of claim 1 , wherein the particles are further characterized by:
(i) a particle size distribution having a D 50 value of between 1.0 μm and 8.0 μm;
(ii) a particle size distribution having a D 90 value of between 12 μm and 70 μm;
(iii) a particle size distribution having a D 10 value of between 0.4 μm and 1.5 μm;
(iv) a DFT mesopore area/BET SSA ratio of below about 0.15; or
(v) a DFT micropore area/BET SSA ratio of above about 0.25.

5. The composition of claim 1 , further comprising at least one lignosulfonate and/or barium sulfate.

6. The composition of claim 1 , wherein the particles are further characterized by a BET surface area greater than about 100 m 2 /g.

7. The composition of claim 1 , wherein the particles are further characterized by an oil absorption of less than about 500 mL/100 g.

8. The composition of claim 1 , wherein the particles are further characterized by an intraparticle pore volume of less than about 2 mL/g.

9. The composition of claim 1 , wherein the particles are further characterized by a total pore volume of less than about 3 mL/g.

10. The composition of claim 1 , wherein the particles are further characterized by a lead uptake of greater than about 2800 ppm.

11. The composition of claim 1 , wherein the particles are further characterized by an oxygen content of more than about 0.6 wt %.

12. The composition of claim 1 , wherein the particles are further characterized by an aqueous dispersion comprising the particles, the aqueous dispersion having a pH below 5.5.

13. The composition of claim 1 , wherein the particles are further characterized by a BET SSA of between about 100 m 2 /g and about 500 m 2 /g.

14. The composition of claim 1 , wherein the particles are further characterized by a xylene density of between about 1.65 g/cm 3 and about 2.1 g/cm 3 .

15. The composition of claim 1 , wherein the particles are further characterized by an oil absorption of between about 70 and about 300 mL/100 g.

16. The composition of claim 1 , wherein the particles are further characterized by a lead uptake of between about 2500 ppm and about 40000 ppm.

17. The composition of claim 1 , wherein the particles are further characterized by a 5 wt % mass loss by thermogravimetric analysis at an onset temperature of below about 580° C.

18. The composition of claim 1 , wherein the particles are further characterized by:
(i) a particle size distribution having a D 50 value of between 1.0 μm and 8.0 μm;
(ii) a particle size distribution having a D 90 value of between 12 μm and 70 μm;
(iii) a particle size distribution having a D 10 value of between 0.4 μm and 1.5 μm;
(iv) a DFT mesopore area/BET SSA ratio of below about 0.15; and
(v) a DFT micropore area/BET SSA ratio of above about 0.25.

Assignees

• Imertech Sas

Inventors

• Cericola Dario
• Spahr Michael

Classifications

• H01M4/133

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

• C09C1/565 Primary

  comprising an oxidative treatment with oxygen, ozone or oxygenated compounds, e.g. when such treatment occurs in a region of the furnace next to the carbon black generating reaction zone · CPC title

• C01P2006/19

  Oil-absorption capacity, e.g. DBP values · CPC title

• C01P2006/14

  Pore volume · CPC title

• C01P2006/12

  Surface area · CPC title