It is not allowed to break a word due to shortage of breath while reciting the Quran.
Many beginners tend to make this mistake and think it is okay for the children to do so.
Splitting a word due to shortage of breath is allowed for the following people:
Absolutely no one is allowed to do that!
Not even the children.
Even those who are carrying a child or sick aren’t excused. If you allow yourself to do this from time to time then your recitation will suffer.