Petrol gives approximately 9 kWh per litre. Diesel can deliver 10 kWh/L. Now compare this to the 0.25 kWh/l produced by current types of lithium-ion batteries, and you will see one heck of a difference.
Put it another way, if your gas tank was say the size of a large suitcase, a lithium-ion battery, to go the same distance, would have to be some 40 suitcases in size!!
That’s why, despite having lots and lots of space filled up with batteries, in the engine space, under the floor etc. etc., most electric cars are lucky to be able to go for 100 miles on a charge. A diesel car, on the other hand, can go for 500 - 600 miles on a fill.
The latest claim to fame for packing the most energy into a litre sized battery is by Ecolocap, who in their latest set of figures recently published, state that they have achieved the amazing energy density of 1.17 kWh per litre. That’s about 5 times greater than the very best current types of battery can pack in, all assuming that their claim can be substantiated.
If Ecolocap come up with the goods, it will make the electric car a much more a viable prospect for anyone other than the city driver.