7. The composite transition metal oxide-based precursor of claim 1, wherein in the precursor, a volume of pores in a range of 5 nm to 50 nm is in a range of 10−3to 10−2cm3/g·nm per weight of particles.
the precursor
volume of pores
in a range of 5 nm to 50 nm
nm
the precursor
volume of pores
in a range of 10−3to 10−2cm3/g·nm
cm3/g·nm