Electroactive Materials for Metal-Ion Batteries
AssigneeNexeon Limited
InventorsCharles MASON, Kseniia Katok, Christopher Michael FRIEND
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Abstract
This invention relates to particulate electroactive materials consisting of a plurality of composite particles, wherein the composite particles comprise: (a) a porous carbon framework including micropores and mesopores having a total volume of 0.5 to 1.5 cm3/g; and (b) silicon located at least within the micropores of the porous carbon framework. The porous carbon framework is an activated carbon material obtained by the pyrolysis of a plant source comprising at least 25 wt % lignin on a dry weight basis followed by activation with steam or carbon dioxide.
Claims29
A particulate material comprising a plurality of composite particles, wherein the composite particles comprise:
- (a) a porous carbon framework comprising micropores and/or mesopores;
- wherein the micropores and mesopores have a total pore volume as measured by gas adsorption of P1 cm3/g, wherein P1 represents a natural number having a value of from 0.5 to 1.5;
- (b) a plurality of elemental nanoscale silicon domains located within the micropores and/or mesopores of the porous carbon framework;
- wherein the porous carbon framework is an activated carbon material obtained by the pyrolysis of a plant source comprising at least 25 wt % lignin on a dry weight basis followed by activation with steam or carbon dioxide.
A particulate material comprising a plurality of composite particles, wherein the composite particles comprise:
- (a) a porous carbon framework comprising micropores and/or mesopores;
- wherein the micropores and mesopores have a total pore volume as measured by gas adsorption of P1 cm3/g, wherein P1 represents a natural number having a value of from 0.5 to 1.5;
- (b) a plurality of elemental nanoscale silicon domains located within the micropores and/or mesopores of the porous carbon framework;
- wherein the porous carbon framework is an activated carbon material obtained by the pyrolysis of coconut shells followed by activation with steam or carbon dioxide.
Dependencies are inferred from the claim text.