Toyota’s Prius model
They say solid-state batteries – unlike lithium-ion ones – can’t catch fire, but on the other hand the electrolyte needs to be warmed up. Years of technical challenges still lie ahead, it seems.
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A team of researchers from Kyoto University and Toyota Motor is making solid progress developing next-generation battery technology that has the potential to cram far more energy into a small, lightweight package than today’s standard lithium-ion, or li-ion, batteries, says Nikkei Asian Review.
The new fluoride-ion battery the researchers are working on, which would hold about seven times as much energy per unit of weight as conventional li-ion batteries, could allow electric vehicles to run 1,000 km on a single charge.
The team has developed a prototype rechargeable battery based on fluoride, the anion — the negatively charged ion — of elemental fluorine.
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Utopia, you are standing in it! 
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