Are you talking chemistry research jobs, or industrial/commercial jobs?
The industrial/commercial is huge. Other then the obvious of working for a battery manufacturing company.
Electrolytic process is the foundation for modern metallurgy, as many of the metals and alloys we use today could not be produced in the quantities and at cost without electrochemistry.
It is also very useful and probably in the top 3 ways for manufacturing bulk chemicals for industry, such as producing pure silicone for industry use (everything from computer chips to glass). A good proportion of the metals on the periodic chart are produced in bulk via means that incorporates electrochemistry for industry, as well as to produce non elemental chemical compounds.
Those are, however industrial jobs, not research.
There is important use for it in research to. Making/improving modern metal alloys, and there is currently substantial research in carbon nanotubes and fullerenes with regard to electrochemistry, along with many other areas being researched.
It is a very practical field of chemistry to study if you are looking for a industrial/commercial job, and there is room for research.