Generally, in Li-ion (or Lithium ion) batteries.
Lithium and Chlorine produce the compound Lithium Chloride.
Lithium is an element with 3 protons in each atom.
If you just say lithium, it's probable you are referring to an atom. Lithium however can form an ion, Li+ (where the + should be a superscript). Without knowing the context it is not possible to give a definitive answer.
Its an element and an atom.
lithium
The compound lithium chloride (LiCl) is formed.
By definition, it will always be an element, never a compound.
The compound lithium chloride (LiCl) is formed.
The compound lithium chloride (LiCl) is formed.
The compound lithium chloride (LiCl) is formed.
The compound lithium chloride (LiCl) is formed.
The compound lithium chloride (LiCl) is formed.