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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.

Next-gen Toyota 86, Subaru BRZ could arrive by 2021

If these rumors are true, a small but dedicated core of fans could be in for a treat. According to Japan Times — and citing unspecified "sources" — Toyota and Subaru are developing a next-generation 86 and BRZ, with a possible launch around 2021. The new car(s) would reportedly have more power, improved handling and newer safety features. According to the report, the rear-drive sports coupes could do away with the current 2.0-liter engine in favor of one with a larger 2.4-liter displacement. The Japan Times sources say the next-gen 86 will also have a lower center of gravity, which will translate to an improvement on the car's already impressive cornering stability. Theoretically, the 2.4-liter in question could be the new FA24 mill used in the upcoming Subaru Ascent crossover that's turbocharged to produce 260 horsepower and 277 pound-feet. That output would be a mammoth jump from the current Toyobaru pair, and it seems doubtful that's what possible second-generation cars would get. Nevertheless, it's at least consistent with recent comments from Toyota engineer Tetsuya Tada that indicated a more powerful, turbocharged 86/BRZ would not be possible unless there was a new, next-generation model. In an interview with Australia's CarAdvice, Tada said, "I do like turbos, however if we come up with a turbo version of the 86 and boost up the power that would result in the necessity of changing the basic configuration completely, to come up with a car that I would be satisfied with." "One characteristic of the 86 is that in terms of the front balance it's slightly front loaded so it makes the handling more fast and agile," he continued. "So if we were to come up with a turbo version, we would have to go change the weight balance between the front and the rear. That means we have to come up with a completely new platform, so it's not about just changing or slight modification in the engine parts." Note that "we have to come up with a completely new platform" does not equal "we are coming up with a completely new platform." He could be talking strictly hypothetically, it could be a wink-wink nudge-nudge implication that his team is already hard at work, or things could've just been a bit fudged in translation. In any event, as hopeful as we are about the possibility of a new generation of Subaru BRZ and Toyota 86, we can't help but maintain a healthy dose of skepticism that the partnership will continue as the Japan Times report suggests.

Toyota wants half its vehicles in Japan to be hybrids

The Toyota Mirai hydrogen fuel cell vehicle could signal the future of motoring with a somewhat accessible price and cutting-edge green technology, but there's no guarantee for the model actually spearheading a revolution in the marketplace. In the meantime, the Japanese brand is continuing to focus on its hybrid powertrains and actually plans to build even more of them. As soon as next year, half of Toyota's sales in Japan could be electrically assisted. According to the Nikkei Asian Review, Toyota is pushing to sell 760,000 hybrids in Japan in 2016, compared to 684,000 last year. That figure would account for half of the company's sales in that country, and the company plans to increase overall production of its gas-electric models. The automaker could build 1.32 million of them next year, which would be about 30 percent more than in 2014. There's actually a financial incentive for Toyota to try this green strategy. Japan's rules for tax breaks on efficient models are about to get more stringent. According to the Nikkei Asian Review, only about half of all new models are expected to meet the guidelines for the incentives, compared to over 80 percent now, and the change could cost buyers as much as 100,000 yen ($840) more. With the impending debut of the next-gen Prius and heightened hybrid production, Toyota can position itself as an attractive choice to customers. News Source: Nikkei Asian Review via Green Car CongressImage Credit: Kazuhiro Nogi / AFP / Getty Images Green Plants/Manufacturing Toyota Hybrid