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A few pre-race notes and a lot of photos from the 24 Hours of Le Mans

The 82nd running of the 24 Hours of Le Mans is on.
Audi has won 12 of the last 15 events, the scion of Auto Union is trying to make it 13 this year. To do so, it will have to overcome a situation faced only three other times during its dominance of La Sarthe: underdog status. Toyota has won the first two races of the year and claimed pole for this race, the rumor being that this year it's Toyota's race to lose.
And then there's Porsche. It's been 16 years since the Stuttgart brand raced on the top rung at Le Mans, three years years since it announced its return, just a year since it acquired Mark Webber in a signing that wasn't subtle and a few months since we got eyes on the 919 Hybrid.

Toyota promoting Mirai as if hydrogen tax credit never went away

At the end of December, the US federal government let the $8,000 tax credit for hydrogen-powered vehicles expire. Despite this little wrinkle, Toyota is still promoting the upcoming 2016 Mirai fuel cell vehicle as a car that will cost under $50,000. In some cases a lot less, since it may also qualify for a $5,000 incentive in California. The car has a $57,500 MSRP, but Nihar Patel, vice president of North American Business Strategy for Toyota Motor Sales, spoke at the 2015 Washington Auto Show last week, and said that the Mirai could cost $44,500 in California. You can see this in the video at around minute four. Toyota knows that the federal incentives have expired, since the real news from the show was Patel's public request to the federal government that the $8,000 tax credit be extended. "We think that the federal credit expiration last year puts [hydrogen] customers in a fairly disadvantageous postion," he said. Plug-in vehicle buyers can still get up to $7,500 tax credit and, "we believe that this inequity needs to be fixed," he said. You can see this in the video at minute 10:20. Toyota said including both the after-incentives price and the call to reinstate those incentives was intentional since it shows a discrepancy between hydrogen and plug-in vehicles in the eyes of the feds. We asked Toyota's director of Energy and Environmental Research, Technical and Regulatory Affairs, Robert Wimmer, for more details on Toyota's request. "[The Mirai] being a ZEV and battery electrics also being ZEVs, we just want to make the playing field as level as possible," he said, adding that any extension would last "for the run of the vehicle," which would be three years. He admitted that the extension might only be for one or two years, if it happens at all. (A Toyota spokesperson clarified to AutoblogGreen that the Mirai program will not end after three years.) And that's the problem. "The tax process is difficult to predict," he said. "The two challenges we have now are that both houses of Congress are Republican and also that there has been talk for a while about comprehensive tax reform. If that moves forward, then extenders would probably be put on the back burner as comprehensive tax reform is discussed." Wimmer would not reveal any details about how Toyota is pressuring the government to act, only saying that Toyota's has people lobbying up on Capitol Hill.

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.