Oh right, so the report you found compared building an bettery and running it in countries that are heavily reliant on coal powered fuels stations.
Yes correct, a country where most electricity is produced from coal (and ignores gasoline refining also using coal power) it will take a while (10 years they state) to get even.
But if you actually consider the fuel generation, not just the engine/battery production then the picture is completely different.
See how many of the arguments on here are exactly the same as https://cleantechnica.com/2018/03/10/electric-car-myth-buster-efficiency/
All based on articles that were spread from investors and people in the Oil industry.
See that everyone is expecting there to be a move towards EVs over the next decade and that the Oil industry is worth about $75 Trillion per year and you have to question why this disinformation is so readily available.