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Styrofoam touches electrodes to create incredibly fast-charging wonderbatteries
Elon Musk's heart may have already given up on the humble battery, lusting after capacitors, but researchers at the University of Illinois have think there's life in the 'ol cells yet, creating batteries that charge and discharge in seconds. They've found a way to create electrodes using polystyrene beads as a sort of substrate, tiny spheres helping to set the porosity of either the nickel-metal hydride or lithium-manganese capacitor material. By adjusting the size and density of the bean bag innards the team was able to create an electrode porosity of 94 percent, which is just a few ticks short of theoretically ideal for exposing the maximum surface area of the electrode to the battery material. This results in extremely fast charges and discharges, the NiMH cell hitting 90 percent capacity in just 20 seconds and discharging in as quickly as 2.7 seconds. While we don't know just what kind of charging system the team was using to achieve this, even assuming a high-amperage stream of electrons this is still a remarkable feat. But, like most major advances there's a drawback: similar to Toshiba's SCiB batts the capacity of these cells is only about three quarters what it would be using normal battery construction, meaning you'd need roughly 25 percent more mass to get the same range in your ultra-fast charging EV of the future. That might just be a worthy trade-off.
American Prius V to get old-school batteries, Japanese version to get fancy Li-ion ones
We'd rather see a more interesting Prius before we see a bigger one, but it's the bigger one that comes first. The taller Prius V that was unveiled in Detroit is said to begin hitting Japanese showrooms next month, priced at ¥3 million (about $37,000) and packing an all-new Li-ion battery in the floor. This is different than the nickel metal hydride pack found in the current Prius, a smaller and lighter design that leaves room for a third row of seats. When the car hits the US, though, we'll get a bigger set of cells like the one in the current Prius, meaning the American version won't have those seats in the back. Irritating? A little, but the version we'll be getting will also be available in Japan, where it will sell for almost $10,000 less than the Li-ion version. For ten grand in savings we'd probably skip the rear seats too.
