Carbonaceous materials for lithium-sulfur batteries
A composition of matter may include pores and non-tri-zone particles and tri-zone particles. In one implementation, each tri-zone particle may include carbon fragments intertwined with each other and separated from one another by mesopores. Each tri-zone particle may also include a deformable perimeter that may coalesce with adjacent non-tri-zone particles or tri-zone particles. In some aspects, the tri-zone particles may include aggregates formed by a multitude of the tri-zone particles joined together. In some aspects, mesopores may be interspersed throughout the aggregates. Each tri-zone particle may also include agglomerates, where each agglomerate includes a multitude of the aggregates joined together. In some aspects, macropores may be interspersed throughout the aggregates.
1. A composition of matter including a plurality of pores, the composition of matter comprising:
a plurality of non-tri-zone particles;
a plurality of tri-zone particles, each tri-zone particle including:
a plurality of carbon fragments intertwined with each other and separated from one another by mesopores; and
a deformable perimeter configured to coalesce with one or more adjacent non-tri-zone particles or tri-zone particles;
a plurality of aggregates, each aggregate including a multitude of the tri-zone particles joined together, each aggregate having a principal dimension in a range between 10 nanometers (nm) and 10 micrometers (μm);
a plurality of mesopores interspersed throughout the plurality of aggregates, each mesopore having a principal dimension between 3.3 nanometers (nm) and 19.3 nm;
a plurality of agglomerates, each agglomerate including a multitude of the aggregates joined to each other, each agglomerate having a principal dimension in an approximate range between 0.1 μm and 1,000 μm; and
a plurality of macropores interspersed throughout the plurality of aggregates, each macropore having a principal dimension between 0.1 μm and 1,000 μm.
2. The composition of matter of claim 1 , further including a selectively permeable shell configured to form a separated liquid phase on one or more exposed surfaces of the composition of matter.
3. The composition of matter of claim 1 , further including an electrolyte dispersed within the composition of matter.
4. The composition of matter of claim 1 , wherein each of the pores has a principal dimension in an approximate range between 0 nanometers (nm) and 32.3 nm.
5. The composition of matter of claim 1 , wherein the composition of matter has an electrical conductivity in an approximate range between 100 S/m to 20,000 S/m at a pressure of 12,000 pounds per square in (psi).
6. The composition of matter of claim 1 , wherein at least some agglomerates are connected to each other with one or more polymer-based binders.
7. The composition of matter of claim 1 , wherein each of the tri-zone particles includes:
a first porosity region located around a center of each of the tri-zone particles, the first porosity region including first pores; and
a second porosity region surrounding the first porosity region, the second porosity region including second pores.
8. The composition of matter of claim 7 , wherein the first pores define a first pore density, and the second pores define a second pore density different the first pore density.