3D self-assembled multi-modal carbon-based particle
This disclosure provides a composition of matter nucleated from a homogenous nucleation to form a self-assembled binder-less mesoporous carbon-based particle. In some implementations, the composition includes: a plurality of electrically conductive 3D aggregates formed of graphene sheets and sintered together to define a 3D hierarchical open porous structure comprising mesoscale structuring with micron-scale fractal structuring and configured to provide an electrical conduction between contact points of the graphene sheets. A porous arrangement is formed in the 3D hierarchical open porous structure and is arranged to contain a liquid electrolyte configured to provide ion transport through a plurality of interconnected porous channels in the 3D hierarchical open porous structure. A respective porous channel of the plurality of porous channels includes: a first portion configured to provide tunable ion conduits; a second portion configured to facilitate rapid ion transport; and, a third portion configured to at least partially confine active material.
1. A battery comprising:
a first electrode;
a second electrode positioned opposite to the first electrode, the second electrode comprising:
a first film deposited on a current collector, the first film including a first plurality of carbon aggregates joined together to define a first porous structure configured to have a first conductivity; and
a second film deposited on the first film, the second film including a second plurality of carbon aggregates joined together to define a second porous structure configured to have a second conductivity that is different than the first conductivity;
an electrolyte contained within the battery, the electrolyte in contact with the first electrode and the second electrode; and
an artificial solid electrolyte interphase (A-SEI) disposed between the first electrode and second electrode.
2. The battery of claim 1 , wherein the first conductivity is greater than the first conductivity.
3. The battery of claim 1 , wherein the first film has a different concentration of carbon aggregates than the second film.
4. The battery of claim 1 , wherein the first film has a higher concentration of carbon aggregates than the second film.
5. The battery of claim 1 , wherein each of the carbon aggregates has an electrical conductivity greater than 500 Siemens per meter (S/m).
6. The battery of claim 1 , further comprising a porous separator positioned between the first electrode and the second electrode.
7. The battery of claim 1 , wherein the first film has an average thickness between approximately 10 μm and approximately 200 μm.
8. The battery of claim 1 , further comprising a third film deposited on the second film, the third film including a third plurality of carbon aggregates joined together to define a third porous structure configured to have a third conductivity that is different than the first conductivity and the second conductivity.
9. The battery of claim 1 , wherein each of first and second porous structures includes a plurality of interconnected channels.
10. The battery of claim 9 , wherein each of the interconnected channels comprises a first portion configured to provide a Li ion conduit and a second portion configured to facilitate rapid Li ion transport.
11. The battery of claim 9 , wherein each of the interconnected channels further comprises a third portion configured to temporarily confine lithium sulfide.
12. The battery of claim 1 , wherein the battery is a lithium-sulfur battery.
13. The battery of claim 1 , wherein the battery is a lithium-ion battery.
14. The battery of claim 1 , further comprising:
one or more additional films deposited on the second film and configured to provide one or more respective electrical conductivities that decrease in magnitude along a line extending from the copper current collector through the one or more additional films.
15. The battery of claim 1 , wherein the second electrode is an anode.