“It is very easy to make a bad battery out of a good material,
but it is impossible to make a good battery out of a bad material.”
This truth underlines the universal position of materials chemistry in battery science. In simple terms one may say that at the core of every energy technology there is a material that can do something. Materials chemistry is the field that synthesizes and characterizes new materials, and in this talk I will give examples of our recent work on Li and Na ion battery materials with emphasis on the development of supercritical fluid technologies.