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Honda presents new battery chemistry that could succeed lithium-ion
Fluoride-ion batteries have long been a viable chemistry except for one thing: To get ions to flow through their solid electrolyte, they had to operate at more than 300 degrees Fahrenheit. Running that hot in a car or especially a mobile device could have disastrous implications.
So, basically a molten salt.
Honda says that by using a stable liquid fluoride electrolyte made of tetraalkylammonium fluoride salts dissolved in an organic, fluorinated ether solvent, it can produce a cell that conducts electricity at room temperature to provide power and to recharge. The cathode is a nano-structure made of copper, lanthanum, and fluorine that resists the kind of dendrite growth that can lead to premature failure and even thermal runaway in a lithium-ion cell.