A Pastry Just Claimed To Out-Range Lucid, And EV Buyers Should Pay Attention
A Finnish startup named Donut Lab just posted independently verified test results showing a solid-state battery cell with an energy density of 805 watt-hours per liter — edging past the 800 Wh/L benchmark set by the Panasonic Energy cells inside Lucid‘s range-leading EVs. The test was conducted by the VTT Technical Research Center, a Finnish government-backed research institution, giving the numbers a credibility that most startup battery claims simply don’t have.
That five-unit gap might sound modest, but in a segment where Lucid has spent years building its identity around best-in-class range, any verified challenger is worth tracking. The catch — and there’s always a catch with solid-state batteries — is that a single optimized cell tested under lab conditions is a long way from a production battery pack in a real car. Here’s what the numbers actually mean, and what has to happen before any of this reaches a showroom.
What 805 Wh/L Actually Means For Real-World Range
Energy density is the spec that determines how much range a battery can deliver for a given size and weight. Lucid’s Panasonic cells, at 800 Wh/L, are the current production benchmark — they’re a big reason the Lucid Air Grand Touring can crack 500 miles on a charge. Donut Lab’s tested cell comes in at 805 Wh/L volumetrically, and also posts 409 Wh/kg by weight.
Panasonic Energy doesn’t publish a per-kilogram figure for its cells, so a direct weight-based comparison isn’t possible. But solid-state batteries are generally lighter than their liquid-electrolyte counterparts, which means Donut Lab’s weight advantage over Lucid’s cells is likely larger than the per-liter numbers suggest. In practical terms, if you could slot a solid-state pack of equivalent volume into a Lucid Air-sized vehicle, the density gain could translate to meaningful additional range — potentially tens of miles — though the exact figure depends heavily on pack architecture, thermal management, and vehicle weight, none of which have been tested here.
The Fine Print On That VTT Test
The VTT test was run on a single cell, fully charged and discharged once, at an optimal 25 degrees Celsius. Those are controlled, ideal conditions — not the variable temperatures, repeated cycles, and real-world load profiles a production battery faces every day. A single cycle tells you the cell’s peak capability; it tells you nothing about how it performs after 500 cycles, or at 0°C in a Minnesota January.
Cycle life, thermal behavior under load, degradation curves, and safety performance under abuse conditions all remain unverified at this stage. Integrating individual cells into a full pack also introduces its own engineering challenges — heat distribution, cell-to-cell consistency, and packaging constraints can all pull real-world density below what a single optimized cell achieves in isolation. Donut Lab has been transparent about this, and the VTT results don’t claim otherwise. The numbers are a proof of capability, not a production spec sheet.
Where Donut Lab Actually Stands Right Now
Donut Lab isn’t purely a lab experiment. The company has already produced small quantities of its first-generation solid-state battery for use in an electric motorcycle built by its sister company, Verge Motorcycles — which means it has cleared at least some of the early manufacturing hurdles that trip up most battery startups before they ever ship a cell.
The company is also deep into a second-generation battery it previewed at CES earlier this year, with a claimed charge time of just seven minutes. Separately, Donut Lab has developed a donut-shaped electric motor that weighs 88 pounds and produces up to 845 horsepower — a spec that signals the company is thinking about the full drivetrain picture, not just the cell chemistry. None of that is in production at automotive scale, but it suggests a broader engineering ambition than a single headline-grabbing benchmark.
Why Mass Production Is Still The Hard Part
Solid-state batteries have been the industry’s perpetual next big thing for over a decade. Toyota has demonstrated vehicles running solid-state cells. Mercedes-Benz has shown prototypes. Neither has committed to a production timeline. China’s automotive roadmap projects small-scale use of all-solid-state batteries by 2030 and large-scale global adoption by 2035 — and that’s from an industry with aggressive investment and government backing.
Donut Lab’s path to automotive-scale manufacturing faces the same fundamental challenges: producing cells consistently, at volume, at a cost that doesn’t make the finished vehicle unaffordable. BYD’s CTO has said material and manufacturing costs for all-solid-state cells in 2027 are expected to run several times higher than conventional lithium-ion packs. For Donut Lab, a startup without a major OEM partner publicly attached, that climb is steeper still. The VTT result is a genuine milestone. The road from that milestone to a production EV is measured in years, not months.
What EV Buyers Should Actually Take From This
Lucid’s range advantage isn’t gone. Its cars are in showrooms today, delivering verified real-world range that no solid-state competitor can match in production form. What Donut Lab’s result does is confirm that the chemistry to surpass Lucid’s benchmark exists outside a major automaker’s R&D lab — and that independent verification is possible for a startup willing to submit to it.
For buyers tracking battery tech, the honest read is this: solid-state batteries are getting closer, the density numbers are real, and the manufacturing problem remains unsolved at scale. If Donut Lab or any competitor cracks that manufacturing challenge, the range ceiling for EVs moves up significantly. Until then, the Lucid Air’s 500-plus-mile range stays the practical benchmark — and the donut-shaped motor with 845 horsepower stays a very compelling conversation piece.
Related posts
Latest Post
No Comments