“MXene” particulate material, production process for the same and secondary battery

A particulate material with a composition expressed by Ti3Alx(C(1-y)Ny)z where “x” is more than 0.02, “y” is 0<“y”<1.0, and “z” is from 1.80 to 2.60, the particulate material comprising layers including gap layers providing an interlayer distance of from 0.44 nm to 0.55 nm within a crystal lattice.

A particulate material whose major component has a composition expressed by Ti2AlC(1-x)Nx where 0<“x”<1, wherein, based on a first peak intensity “A” of a (002) plane in Ti2Al(C(1-x)Nx) where 0<“x”<1 exhibited in an X-ray diffraction test,

• a (002) plane in Ti3Al(C(1-x)Nx)2 where 0<“x”<1 exhibits a second peak intensity “B” such that a ratio of the second peak intensity “B” to the first peak intensity “A” (“B”/“A”) is from 0.03 or more to 0.07 or less, and
• a crystal phase other than Ti2AlC(1-x)Nx where 0<“x”<1 and Ti3Al(C(1-x)Nx)2 where 0<“x”<1 exhibits a third peak intensity “C” such that a ratio of the third peak intensity “C” to the first peak intensity “A” (“C”/“A”) is 0.10 or less.