Electroactive materials for metal-ion batteries
AssigneeNexeon Limited
InventorsCharles Mason, Richard Taylor, James Farrell, William Macklin
Life of this patent
Estimating the term…
Abstract
This invention relates to particulate electroactive materials comprising a plurality of composite particles, wherein the composite particles comprise: (a) a porous carbon framework including micropores and optional mesopores having a combined total volume of at least 0.7 cm3/g, wherein at least half of the micropore/mesopore volume is in the form of pores having a diameter of no more than 1.5 nm; and (b) an electroactive material located within the micropores and/or mesopores of the porous carbon framework. The D90 particle diameter of the composite particles is no more than 10 nm.
Claims20
A particulate material comprising a plurality of composite particles, wherein the composite particles comprise:
- (a) a porous carbon framework comprising micropores and optional mesopores,
- wherein the micropores and optional mesopores have a total pore volume as measured by gas adsorption of P1 cm3/g, wherein P1 has a value of at least 0.75 and up to 2,
- wherein the PD50 pore diameter as measured by gas adsorption is no more than 2 nm;
- and
- (b) silicon located within at least the micropores of the porous carbon framework, with at least 90 wt % of the silicon mass in the composite particles being located within the internal volume of the porous carbon framework;
- wherein the composite particles have a D50 particle diameter of no more than 7 μm and a particle size span ((D90−D10)/D50) of 5 or less.
A particulate material comprising a plurality of composite particles, wherein the composite particles comprise:
- (a) a porous carbon framework comprising micropores and optional mesopores,
- wherein the micropores and optional mesopores have a total pore volume as measured by gas adsorption of P1 cm3/g, wherein P1 has a value of at least 0.75 and up to 2,
- wherein the PD90 pore diameter as measured by gas adsorption is no more than 10 nm;
- and
- (b) silicon located within at least the micropores of the porous carbon framework, with at least 90 wt % of the silicon mass in the composite particles being located within the internal volume of the porous carbon framework;
- wherein the composite particles have a D50 particle diameter of no more than 7 μm and a particle size span ((D90−D10)/D50) of 5 or less.
A particulate material comprising a plurality of composite particles, wherein the composite particles comprise:
- (a) a porous carbon framework comprising micropores and optional mesopores,
- wherein the micropores and optional mesopores have a total pore volume as measured by gas adsorption of P1 cm3/g, wherein P1 has a value of at least 0.75 and up to 2,
- wherein the PD50 pore diameter as measured by gas adsorption is no more than 2 nm;
- and
- (b) silicon located within at least the micropores of the porous carbon framework, with at least 90 wt % of the silicon mass in the composite particles being located within the internal volume of the porous carbon framework,
- wherein the composite particles have a D90 particle diameter of no more than 10 μm.
Dependencies are inferred from the claim text.