Don't specialize too much. Presently you like electrochemistry, OK. In the future, you don't know.
Also, technologies have a time for development, a time for sales, a time for obsolescence. CR-roms or hard disk drives don't hire researchers any more. Batteries have been around for a long time, but that's no proof for their future. Maybe at some point all research will have been done, just like we've discovered all continents, all planets around our Sun, possibly all particles. Or a completely different technology will replace batteries. Or all companies will have relocated to a place where you don't want to live, just like microelectronics vanished from Europe.
And learn languages.