I got that impression too, but it does say "But the path he has chosen involves one of the toughest problems in battery science, which is how to make an anode out of pure lithium or sodium metal."
I suppose that implies he's trying to make an anode out of pure lithium or sodium, but you never know with science journalism.
I suppose that implies he's trying to make an anode out of pure lithium or sodium, but you never know with science journalism.