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December 08, 2020 09:59 AM

VW-backed battery startup claims Tesla-topping tech

Bloomberg
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    QuantumScape, a battery startup that counts Volkswagen Group as its largest shareholder, says new data show its batteries can be charged to as much as 80 percent of full power in 15 minutes, almost twice as fast as a Tesla Model 3.

    The performance data, which have yet to be road tested, suggests QuantumScape's batteries could offer about 50 percent more miles than the same electric car with current commercial battery technology.

    They also can be charged 800 times with minimal degradation, meeting a benchmark for batteries in most electric vehicles. But the startup has yet to demonstrate it can mass manufacture its new battery.

    QuantumScape raised more than $700 million by going public via a reverse merger earlier this year. It's now seeking to bolster investor confidence it can pull off a breakthrough that has eluded battery researchers for decades.

    The California-based company is one of several startups and incumbents trying to develop solid-state batteries, an innovation that holds the promise of dramatically speeding up EV adoption by providing automakers with a safer, cheaper alternative to lithium ion batteries.

    The big question is whether the process QuantumScape used in the lab can work in a factory setting, said Venkat Srinivasan, director of the government-backed Argonne National Laboratory's battery center, who spoke before seeing the data. "For most startups, that's where they got stuck."

    Solid-state batteries use solid materials instead of flammable liquids to enable charging and discharging. They could potentially pack more energy than lithium ion batteries to extend driving range, lower costs, improve safety and cut recharging times -- putting EVs on par with gasoline-powered vehicles. QuantumScape's battery uses an electrolyte gel in only one half of a typical lithium ion battery, which means it's yet to fully exploit the technology's potential.

    FOCUS ON ELECTRIFICATION NEWSLETTER: A monthly wrap-up of the latest electric vehicle news, including interviews and global EV sales data, delivered to your inbox.
    Too expensive?

    Automakers such as Toyota, Tesla and established battery manufacturers including Samsung and China's Contemporary Amperex Technology Co., as well as startups like Solid Power and Cuberg are trying to crack the code on solid-state batteries, but so far no one has built a commercial product and put it in a real car.

    Some Chinese manufacturers are expecting to start mass production of solid-state batteries within the next couple of years, according to BloombergNEF.

    Volkswagen has committed to using QuantumScape's technology in its EVs via a joint venture -- if enough batteries can be produced and at competitive prices.

    To become commercially viable, the startup needs to deal with three main issues. It must build bigger and multilayered batteries compared with what it's testing in a controlled laboratory setting. It also needs to build a reliable manufacturing line for certain critical components such as ceramic separators. Finally, it has to put all those components into a factory where it can spread billions of dollars in equipment and machinery costs over large production volumes.

    Investors seem to believe the startup can make the leap to mass manufacturing. Shares of QuantumScape, which began trading Nov. 27 after it merged with a blank-check company, Kensington Capital Acquisition, have soared about 88 percent to $44.17.

    That's too expensive for a company that still has to prove it can take its tech from the lab to the manufacturing line, according to Mark Newman, an analyst at Sanford C. Bernstein in Hong Kong.
    "Although we are positive on the battery opportunity, the team and the technology, we believe given the significant hurdles to commercialization, shares are overvalued," Newman wrote in a Nov. 30 note.

    Ceramic differentiator

    QuantumScape's big capital raise is a crucial first step toward commercializing its technology. The company estimates it will cost $1.6 billion to build its first battery factory, a 50-50 joint venture with VW that is supposed to start producing cells in 2024.

    Spun out of Stanford University a decade ago, QuantumScape is backed by Bill Gates and venture capitalists John Doerr and Vinod Khosla. There are two Tesla veterans on its board, including former Chief Technology Officer J.B. Straubel.

    One of the key differentiators for QuantumScape is its ceramic separator: a thin, flexible sheet that allows lithium ions to travel back and forth between the positive and negative ends of a battery cell while preventing lithium metal from forming string-like "dendrites" that cause battery fires.

    "No one has made a solid-state separator that can cycle at these rates of power or at these temperatures or for this long," CEO Jagdeep Singh said in an interview. "Without those things, you don't have a cell that can be used in a car."

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