Earlier this year, a Finnish startup called Donut Lab announced it had achieved a breakthrough in solid-state batteries. This type of battery is highly sought after for its high-density, fast-charging, and durable qualities. Donut Lab, originally a part of Verge Motorcycles, anticipates beginning production later this year. Despite their claims, the scientific community remains skeptical, as many have tried to solve the challenges solid-state batteries present, but success has always seemed just out of reach.
Skeptics highlight that Donut Lab lacks a track record in the field, causing doubt about its credibility. To counter skepticism, the startup launched a website, idonutbelieve.com, where it posted test results from Finland’s VTT Research Centre, vouching for the battery’s capabilities. These tests suggest the battery is not just theoretical but tangible.
Donut Lab’s CEO acknowledges skepticism will persist despite proof, due to the threat new technology poses to established industry players. At CES, the startup revealed bold claims: a battery energy density of 400Wh/kg, charge time of five minutes, a lifespan of 100,000 cycles, performance across temperature extremes, and no rare materials in use. However, key details like chemistry remain unverified.
If proven true, such a battery could revolutionize the electric vehicle market, enabling longer travel ranges and reducing fire risks. Current lithium-ion batteries generate heat, leading to risks of “thermal runaway” fires. Solid-state batteries could potentially eliminate this danger, making quick charging more feasible.
Challenges like dendrite formation have hindered previous advancements in solid-state technology. Dendrites can cause short circuits, presenting significant obstacles. Recent studies, like one from MIT, suggest chemical reactions weaken electrolytes, contributing to the issue, emphasizing the need for chemically stable materials.
Progress is notable in China, where CATL, a major battery manufacturer, aims to begin small-scale production of solid-state batteries by 2027. Other Chinese firms are pursuing similar technologies, setting plans for mass production with competitive specs. Western companies like Honda, Toyota, and Mercedes are also exploring different solid-state solutions.
Donut Lab, despite skepticism, continues its efforts and claims to have a new version of its battery ready for customers. The CEO admitted the high cycle-life claim was an aspirational target, with actual testing based on projections. Additionally, Donut Lab has introduced promotional merchandise, keeping its developments in the spotlight.