Pyrolysis coke

A composition comprising:

• a plurality of particles, 90 wt % or more of the plurality of particles having a core-and-shell structure comprising a shell portion and a core portion, the shell portion of the core-and-shell structure comprising pyrolysis coke, the core portion of the core-and-shell structure comprising a carbonaceous material different from pyrolysis coke, the plurality of particles having an average apparent density of 1.0 g/cm3 to 1.9 g/cm3 as measured according to ASTM D2638-21, the average apparent density being lower than an average apparent density of the core portion of the core-and-shell structure.

A composition comprising:

• a plurality of particles, 90 wt % or more of the plurality of particles having a core and shell structure comprising a shell portion and a core portion, the shell portion of the core-and-shell structure comprising pyrolysis coke, the core portion of the core-and-shell structure comprising a carbonaceous material different from pyrolysis coke, the plurality of particles having a BET surface area of 0.01 m2/g to 10.0 m2/g as measured according to ASTM D6556-21, the plurality of particles having an average apparent density of 1.0 g/cm3 to 2.26 g/cm3 as measured according to ASTM D2638-21.

A composition comprising:

• a plurality of particles comprising pyrolysis coke, the plurality of particles having an average apparent density of 1.0 g/cm3 to 2.26 g/cm3, as measured according to ASTM D2638-21, the plurality of particles having a D50 value between 40 μm and 500 μm and a difference between a D10 value and a D90 value of 30 μm to 250 μm, as measured according to ASTM D4464-15(2020).

A composition comprising:

• a plurality of particles, 90 wt % or more of the plurality of particles having a core and shell structure comprising a shell portion and a core portion, the shell portion of the core-and-shell structure comprising pyrolysis coke, the core portion of the core-and-shell structure comprising a carbonaceous material different from pyrolysis coke, the plurality of particles having an average apparent density of 1.0 g/cm3 to 2.26 g/cm3 as measured according to ASTM D2638-21, the plurality of particles having a D50 value between 40 μm and 500 μm and at least one of a) a difference between a D10 value and a D90 value of 40 μm to 250 μm and b) a difference between a D10 value and the D50 value of 50 μm or less.

A composition comprising:

• a plurality of particles, 90 wt % or more of the plurality of particles having a core and shell structure comprising a shell portion and a core portion, the shell portion of the core-and-shell structure comprising pyrolysis coke, the plurality of particles having an average apparent density of 1.0 g/cm3 to 2.26 g/cm3 as measured according to ASTM D2638-21, the plurality of particles having a D50 value between 40 μm and 500 μm and a difference between a D10 value and a D90 value of 30 μm to 250 μm.