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Solid-state batteries: Why Toyota's plans could be a game-changer for EVs

Word out of Japan today is that Toyota is working on launching a new solid-state battery for electric vehicles that will put it solidly in the EV game by 2022. Which leads to a simple question: What is a solid-state battery, and why does it matter? Back in February, John Goodenough observed, "Cost, safety, energy density, rates of charge and discharge and cycle life are critical for battery-driven cars to be more widely adopted." And risking a bad pun on his surname, he seemed to be implying that all of those characteristics weren't currently good enough in autos using lithium-ion batteries. This comment is relevant because Goodenough, professor at the Cockrell School of Engineering at the University of Texas at Austin - it so happens, he turns 95 today - is the co-inventor of the lithium-ion battery, the type of battery that is pretty much the mainstay of current electric vehicles. And he and a research fellow at U of T were announcing they'd developed a solid-state battery, one that has improved energy density (which means a car so equipped can drive further) and can be recharged more quickly and more often (a.k.a., "long cycle life") than a lithium-ion battery. (Did you ever notice that with time your iPhone keeps less of a charge than it did back when it was shiny and new? That's because it has a limited cycle life. Which is one thing when you're talking about a phone. And something else entirely when it involves a whole car.) What's more, there is reduced mass for a solid-state battery. And there isn't the same safety concern that exists with li-ion batteries vis-a- vis conflagration (which is why at airplane boarding gates they say they'll check your carryon as long as you remove all lithium-ion batteries). Lithium-ion batteries may be far more advanced than the lead-acid batteries that are under the hood of essentially every car that wasn't built in Fremont, Calif., but as is the case with those heavy black rectangles, li-ion batteries contain a liquid. In the lithium-ion battery, the liquid, the electrolyte, moves the lithium ions from the negative to the positive side (anode to cathode) of the battery. In a solid-state design, there is no liquid sloshing around, which also means that there's no liquid that would freeze at low operating temperatures. What Toyota is using for its solid-state battery is still unknown, as is the case for the solid-state batteries that Hyundai is reportedly working on for its EVs.

2015 Hyundai Sonata Eco nets 38 mpg from 1.6L turbo, 7-speed DCT

The wholly renewed 2015 Hyundai Sonata is on the verge of launching here in the United States, but it appears there's a bit more to the story first told at the New York Auto Show earlier this year. Hyundai has just revealed the first images and details of the Sonata Eco, a new entry in its midsize sedan lineup that combines a small, turbocharged engine and dual-clutch transmission to achieve an estimated 28 miles per gallon in the city and 38 mpg highway.
That new powertrain is Hyundai's 1.6-liter turbocharged inline-four, rated at 177 horsepower and 195 pound-feet of torque. That power is sent through a new, seven-speed dual-clutch 'box - the first gearbox of its type in the segment. Hyundai points out that the Sonata Eco's 32 mpg combined rating offers a 10 percent improvement over the 2015 Sonata SE with its 2.4-liter naturally aspirated inline-four.
38 mpg highway is pretty impressive, especially considering rivals like Toyota's electrified Camry Hybrid musters up only one better, with 39 mpg on the highway (though its 43 mpg city fuel economy is, obviously, much better). And while Hyundai still has not detailed news about a next-generation Sonata Hybrid, we've heard the company is still committed to offering one.

Hyundai to buy electric vehicle batteries from SK Innovation, according to report

SEOUL — Hyundai Motor and affiliate Kia Motors have decided to secure electric vehicle batteries from SK Innovation for the next four to five years, Maeil Business Newspaper said on Friday, citing industry sources. The sources said the deal was worth more than 10 trillion won ($8.6 billion). SK Innovation, Hyundai Motor and Kia declined to comment. Hyundai Motor said in October it would launch 16 EV models by 2025, aiming to boost EV sales 560,000 by then, a level that would be equivalent to more than 10% of its projected global sales this year. Reporting by Hyunjoo Jin. Related Video: