Under the skin: Why solid-state batteries are a big positive


The biggest bonus, though, is the energy density – the amount of energy a battery can store relative to its weight and volume. Claims for batteries capable of storing more than twice the energy of a conventional lithium ion battery are being made, along with reduced manufacturing costs. This simply means a solid-state battery will last longer and give an EV a greater range than a conventional battery of the same volume and weight. It’s that virtuous circle again. The lighter the battery, the lighter the car, the less energy it needs to achieve the same range, so the battery can be even smaller. 

Car makers are talking about the technology being in production by 2025 and some sooner than that. When and if it happens, it would radically change the automotive landscape. Radically increased range would reduce the need for charging on the move, easing the pressure on infrastructure, because one overnight charge (for those with such access) could make the need to charge during a longer journey less necessary than it is today. 

Inside a lithium ion battery

When the battery is connected to the device it is powering, like a motor, phone or whatever, ions are released from the negative anode to the positive cathode. When the battery is connected to the charger, the opposite happens and the battery is recharged.

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