lithium-manganese
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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.
Think City electric car gets bigger American batteries for bigger American roads
The electric Think City has been targeting an American release for well over two years now but, like many EVs, those dates just kept on 'a slipping. Now the cars are finally starting to hit the colonies and, as a reward for the wait, we're receiving models with more powerful batteries. The cells are supplied by Indiana-based Ener1, a new lithium-manganese pack that offers 25kWh. Those cells are said to double the car's previous expected range, up to 100 miles from 50, yet still recharge in a scant four hours -- if you're using a 240v plug. The folks at Green Car Advisor managed a maximum of 68mph in the two-seater and, driving in a decidedly non-eco-minded way, managed 43.5 miles with 38 percent left, giving an estimated 75 miles for those with leaden right foots. That, at least, is promising, and while a $28,000 MSRP is rather a bitter pill, it's a good bit cheaper (though smaller) than the Nissan Leaf. And don't forget that Uncle Sam would be happy to knock at least a few grand off of that price, too.
