The city plans to roll out 2,000 new electric cars in a revamp of the municipal-vehicle fleet that will take place over the next decade.

The additions will give New York the largest fleet of electric vehicles in the country and are expected to help cut city car emissions by at least 9 percent by 2025, the mayor’s office said Tuesday.

The plan’s capital costs — which would include the creation of new charging stations for the vehicles — are expected to range from $50 million to $80 million, according to spokeswoman Amy Spitalnick.

The plan will also expand the use of anti-idling devices in sanitation trucks and other heavy-duty vehicles to reduce emissions, and increase the use of biodiesel and natural gas.