Carbon black having a specific surface area of 150 m2/g or more and 400 m2/g or less, and a ratio (S2/S1) of a peak area (S2) of a peak at m/z 128 to a peak area (S1) of a peak at m/z 57 detected through thermal desorption spectroscopy of less than 2.00.

Carbon black having a specific surface area of 150 m2/g or more and 400 m2/g or less and a hydrochloric acid absorption amount of 30 mL/5 g or more, wherein, when a 3 mass% slurry is prepared using N-methyl-2-pyrrolidone as a dispersion medium, the slurry ...

Carbon black having a specific surface area of 150 m/g or more and 400 m/g or less, and a ratio (DBP/CDBP) of a DBP absorption (DBP) to a compressed DBP absorption (CDBP) of 2.0 or less.

Carbon black having a specific surface area of 150 m/g or more and 400 m/g or less, and a ratio (Lc/SSA) of a crystallite size (Lc (Å)) to a specific surface area (SSA (m/g)) of 0.15 or less.

A porous carbon material having a first peak positioned in a pore diameter range of 3 nm or larger and smaller than 10 nm and a second peak positioned in a pore diameter range of 10 nm or larger and 10 µm or smaller in a pore size distribution measured by...