are solid state batteries even possible? If i remember high school physics correctly, electrons only really move on the surface of a metal, which is why power lines are braided or thin wires instead of a solid one and why faraday cages work.
If they really wanted to make a more effective battery, they'd need to make something that has a million layers of gold leaf or something.
maybe a battery made from gold, lead, and graphite would be more energy dense. Ignoring the cost to make
Solid state batteries per se work, and are not even anything new. It just means the dielectric is a solid. But specifically it means solid state Lithium Ion batteries now. Lithium Ion batteries have two issues, the dielectric is flammable, and the anodes have a tendency to grow tiny little dendrites to the cathodes over time, which, once a connection is made, can short out the cells, releasing the energy stored in the cell, and starting a fire. A solid dielectric would fix both issues, which is why people have been trying to get them to work for years now. If you don't run into danger of shortening out the cells by dendrite growth, you can ramp up the charging current, for example.
But solid state LiIon batteries have some issues, and so far they haven't really gone into mass production despite yearly promises.
Like this, from half a year ago. Let's see what comes from it. Not holding my breath, regular LiIon production capacity has now been expanded a LOT by chinese manufacturers so shit's cheap, and LiIon won't go away for quite a bit until someone takes the plunge and makes a new type competitive. Once a new type even works reliably.
Ideally you'd want a new cell type that has a higher energy density than regular LiIon, can be charged faster, degrades less, and isn't a fire hazard. Bonus points if the cell uses Sodium instead of Lithium so it's cheaper. Wouldn't hold out for that, tho, Sodium usually gives you a low cell voltage, so there are downsides. Not to mention that pure sodium would be also a fire hazard and a half.