Finnish startup Donut Lab has doubled down on its controversial claim that it has produced a “miracle” solid‑state battery, despite a recent analysis by the UK testing firm Intertek that found only 3.4 ppm of lithium in the cell it submitted for examination. The Intertek report, published on Electrek, measured just two elements—lithium and sodium—and concluded that the sample’s lithium content is far too low to support the high‑energy claims made by Donut Lab. The startup argues that the cell is neither a conventional lithium‑ion nor a sodium‑ion device, implying a new chemistry that sidesteps the need for bulk lithium.

The controversy matters because solid‑state batteries are widely viewed as the next leap in energy storage, promising higher energy density, improved safety, and the ability to pair with lithium‑metal anodes. If Donut Lab’s technology were genuine, it could dramatically shorten the timeline for commercial solid‑state cells. However, the lack of independent verification, the minimal elemental analysis, and the absence of any working prototype in a vehicle have left most experts skeptical.

Industry observers note that solid‑state breakthroughs typically require rigorous validation of electrolyte stability, interfacial resistance, and cycle life—metrics that were not addressed in the Intertek brief. Without such data, the claim remains speculative, and investors are likely to demand more substantive proof before committing capital. The episode underscores the broader challenge of separating hype from viable technology in a field where many startups promise “miracle” performance but struggle to deliver reproducible results.

Donut Lab’s next step will be to provide a full electrochemical characterization, ideally under third‑party laboratory conditions, to substantiate its claims. Until then, the story serves as a cautionary tale for the solid‑state community, highlighting the need for transparent, peer‑reviewed data before a new chemistry can be taken seriously.

Sources: Electrek – Donut Lab “miracle” solid‑state battery.

Kyushu Electric Power Co., a major Japanese utility, announced a strategic investment in ProLogium Technology Co., the Taiwanese leader in all‑solid‑state lithium‑metal batteries. The partnership, detailed on ProLogium’s corporate site, includes a capital infusion and a joint R&D roadmap aimed at accelerating the commercialization of next‑generation solid‑state cells for both grid‑scale storage and electric‑vehicle applications.

ProLogium’s solid‑state platform relies on a sulfide‑based electrolyte that enables high ionic conductivity at room temperature while maintaining compatibility with a lithium‑metal anode. The collaboration will leverage Kyushu’s extensive grid infrastructure to pilot large‑format solid‑state modules, providing real‑world performance data on cycle life, safety under high‑power discharge, and temperature stability. In return, ProLogium gains a reliable demand anchor and access to Japan’s advanced manufacturing ecosystem, potentially shortening the time needed to scale from laboratory cells to gigawatt‑hour production lines.

The move is significant because utilities have traditionally been cautious about emerging battery chemistries, preferring proven lithium‑ion technology for grid storage. By committing capital and test sites, Kyushu signals confidence that solid‑state batteries can meet the stringent reliability and cost targets required for utility‑scale deployment. Moreover, the partnership could help ProLogium overcome one of the industry’s biggest hurdles: the high cost of sulfide electrolytes and the difficulty of forming defect‑free interfaces at scale.

Analysts expect that the joint effort could lead to a pilot plant in Japan by 2028, with an initial target of 200 MWh of solid‑state storage capacity. If successful, the collaboration would provide a template for other utilities worldwide to adopt solid‑state technology, potentially accelerating the transition away from liquid‑electrolyte lithium‑ion batteries in both stationary and mobile sectors.

Sources: ProLogium – Kyushu Electric Power Strategic Investment.

ProLogium announced a $50 million primary capital commitment from Translational Development Acquisition Corp. (TDAC), a special‑purpose acquisition company, to support its proposed business combination and the scaling of its all‑solid‑state lithium‑metal battery platform. The press release on ProLogium’s website outlines that the funds will be earmarked for expanding production capacity, advancing electrolyte manufacturing, and accelerating the certification of its solid‑state cells for automotive and grid‑storage markets.

The capital raise comes at a pivotal moment for ProLogium, which has already begun limited‑volume production of high‑energy‑density solid‑state cells and secured several OEM partnerships. The infusion is expected to enable the construction of a new 10‑GWh annual production line, incorporating dry‑electrode coating technology that reduces solvent usage and improves manufacturing throughput—a key advantage over traditional slurry‑based processes.

From a commercialization perspective, the funding addresses two critical bottlenecks: electrolyte cost and cell‑stack integration. By investing in larger‑scale sulfide electrolyte synthesis and automated stack assembly, ProLogium aims to bring the cost of solid‑state cells down to the $120/kWh range by 2030, a price point that could make them competitive with next‑generation lithium‑ion chemistries. The SPAC merger also provides a public‑market pathway for ProLogium, offering greater visibility and access to additional financing for future expansion.

Market analysts view the move as a vote of confidence in solid‑state technology’s commercial viability, especially as major automakers continue to pledge solid‑state powertrains for the early 2030s. If ProLogium can meet its scaling targets, the company could become a primary supplier of solid‑state cells for high‑performance EVs and long‑duration grid storage, potentially reshaping the competitive landscape that has been dominated by lithium‑ion incumbents.

Sources: ProLogium – $50 Million Primary Capital Investment Announcement.