Surface-modified carbon hybrid particles, methods of making, and applications of the same
Surface-modified carbon hybrid particles may be characterized by a high surface area and a high mesopore content. Surface-modified carbon hybrid particles may be in agglomerated form. Surface-modified carbon hybrid particles may be used, for example, as conductive additives. Dispersions of such compounds in a liquid medium in the presence of a surfactant may be used, for example, as conductive coatings. Polymer compounds filled with the surface-modified carbon hybrid particles may be formed. Surface-modified carbon hybrid particles may be used, for example, as carbon supports.
1. Surface-modified carbon hybrid particles comprising:
a graphite core coated with amorphous carbon in agglomerate form having a BET surface area of at least 50 m 2 /g and no greater than 800 m 2 /g, and a DFT mesopore area of at least 40 m 2 /g and no greater than 400 m 2 /g.
2. The surface-modified carbon hybrid particles of claim 1 ,
wherein a ratio of DFT mesopore area to total DFT pore area ranges from 20 to 90%;
wherein the DFT mesopore volume is at least 0.10 cm 3 /g; and/or
the ratio of DFT mesopore volume to total DFT pore volume ranges from 50 to 95%.
3. The surface-modified carbon hybrid particles of claim 1 ,
wherein the agglomerates have a D 90 value as determined by a wet dispersion method ranging from 20 to 60 μm;
wherein the agglomerates have a D 50 value ranging from 7 to 15 μm;
wherein the agglomerates have a D 10 value ranging from 0.3 to 4 μm; and/or
wherein the agglomerates have a D 90 value as determined by the dry dispersion method ranging from 50 to 300 μm.
4. The surface-modified carbon hybrid particles of claim 1 ,
wherein the oxygen content is at least 0.45% w/w; and/or
wherein the pH is below 7.0.
5. The surface-modified carbon hybrid particles of claim 1 ,
wherein the tapped density ranges from 0.35 to 0.7 g/cm 3 ; and/or
wherein the Scott density ranges from 0.2 to 0.6 g/cm 3 .
6. The surface-modified carbon hybrid particles of claim 1 ,
wherein the oil absorption is 150% w/w or less; and/or
wherein the degree of graphitization ranges from 80 to 95%.
7. The surface-modified carbon hybrid particles of claim 1 ,
wherein the D 90 value of non-agglomerated particles as determined by the wet dispersion method is less than 10 μm;
wherein the D 50 value of non-agglomerated particles is less than 4 μm; and/or
wherein the D 10 value of non-agglomerated particles is less than 0.6 μm.
8. The surface-modified carbon hybrid particles of claim 1 , having a crystallite size Lc (as measured by XRD) of from 10 to 100 nm.
9. Surface-modified carbon hybrid particles comprising:
a graphite core coated with amorphous carbon in agglomerate form having a BET surface area of at least 50 m 2 /g and no greater than 800 m 2 /g, and a DFT mesopore area of at least 40 m 2 /g and no greater than 400 m 2 /g, and wherein the tapped density ranges from 0.35 to 0.7 g/cm 3 .
10. The surface-modified carbon hybrid particles of claim 9 , having a crystallite size Lc (as measured by XRD) of from 10 to 100 nm.
11. The surface-modified carbon hybrid particles of claim 9 ,
wherein a ratio of DFT mesopore area to total DFT pore area ranges from 20 to 90%;
wherein the DFT mesopore volume is at least 0.10 cm 3 /g; and/or
the ratio of DFT mesopore volume to total DFT pore volume ranges from 50 to 95%.
12. The surface-modified carbon hybrid particles of claim 9 ,
wherein the agglomerates have a D 90 value as determined by a wet dispersion method ranging from 20 to 60 μm;
wherein the agglomerates have a D 50 value ranging from 7 to 15 μm;
wherein the agglomerates have a D 10 value ranging from 0.3 to 4 μm; and/or
wherein the agglomerates have a D 90 value as determined by the dry dispersion method ranging from 50 to 300 μm.
13. The surface-modified carbon hybrid particles of claim 9 , wherein the particles have at least one of the following characteristics:
a tapped density ranging from 0.35 to 0.7 g/cm 3 ;
a Scott density ranging from 0.2 to 0.6 g/cm 3 ;
an oil absorption of 150% w/w or less;
a degree of graphitization ranging from 80 to 95%; and
a pH of below 7.0.
14. The surface-modified carbon hybrid particles of claim 9 ,
wherein the D 90 value of non-agglomerated particles as determined by the wet dispersion method is less than 10 μm;
wherein the D 50 value of non-agglomerated particles is less than 4 μm; and/or
wherein the D 10 value of non-agglomerated particles is less than 0.6 μm.
15. Surface-modified carbon hybrid particles comprising:
a graphite core coated with amorphous carbon in agglomerate form having a BET surface area of at least 50 m 2 /g and no greater than 800 m 2 /g, and a DFT mesopore area of at least 40 m 2 /g and no greater than 400 m 2 /g, and having an oxygen content of at least 0.45% w/w.
16. The surface-modified carbon hybrid particles of claim 15 , having a crystallite size Lc (as measured by XRD) of from 10 to 100 nm.
17. The surface-modified carbon hybrid particles of claim 15 ,
wherein a ratio of DFT mesopore area to total DFT pore area ranges from 20 to 90%;
wherein the DFT mesopore volume is at least 0.10 cm 3 /g; and/or
the ratio of DFT mesopore volume to total DFT pore volume ranges from 50 to 95%.
18. The surface-modified carbon hybrid particles of claim 15 ,
wherein the agglomerates have a D 90 value as determined by a wet dispersion method ranging from 20 to 60 μm;
wherein the agglomerates have a D 50 value ranging from 7 to 15 μm;
wherein the agglomerates have a D 10 value ranging from 0.3 to 4 μm; and/or
wherein the agglomerates have a D 90 value as determined by the dry dispersion method ranging from 50 to 300 μm.
19. The surface-modified carbon hybrid particles of claim 15 , wherein the particles have at least one of the following characteristics:
a tapped density ranging from 0.35 to 0.7 g/cm 3 ;
a Scott density ranging from 0.2 to 0.6 g/cm 3 ;
an oil absorption of 150% w/w or less;
a degree of graphitization ranging from 80 to 95%; and
a pH of below 7.0.
20. The surface-modified carbon hybrid particles of claim 15 ,
wherein the D 90 value of non-agglomerated particles as determined by the wet dispersion method is less than 10 μm;
wherein the D 50 value of non-agglomerated particles is less than 4 μm; and/or
wherein the D 10 value of non-agglomerated particles is less than 0.6 μm.