The answer is solid state batteries, they are what is going to make the change possible: Solid-state batteries replace the liquid or polymer electrolyte found in current lithium-ion batteries with a solid. The challenge, however, is in finding a solid material that is conductive enough to be used in large batteries. The main benefits are batteries that are smaller, higher-capacity and cheaper than current liquid-based lithium-ion batteries. In 2014, Sakti3 announced it was approaching a point where it could produce a battery with twice the density of current batteries at a fifth of the cost. They’re also non-flammable and, in theory, could last longer and charge faster. Current lithium-ion batteries are flammable and they also create a lot of heat, which in electric cars means lots of extra gear to contain and dissipate it. An electric car with a solid-state battery could remove all the cooling elements in favour of a larger battery, and therefore longer range, or reduce the size of the battery while retaining the same range and cutting the cost. Current batteries are also notorious for having short lifespans. Constant charging and discharging slowly erodes the performance of the battery, which is why a two-year-old iPhone often struggles to get through a whole day of use on one charge. According to Ilika, a developer of solid-state batteries for Internet of Things devices, they could increase ‘cycle life’ from two years to 10 years. A Wall Street Journal report suggested this could result in greater potential for product recycling after being used in the vehicle, such as in homes or commercial energy storage. https://www.wired.co.uk/article/what-is-solid-state-battery-toyota-dyson They still need to work out things for solid state batteries, but when they do it will be an easy change.