Organic flow batteries attract Japanese and Chinese backing for cheaper grid storage
Two US startups, XL Batteries and Quino Energy, are advancing organic flow battery technology with new partnerships from Japanese energy giant ENEOS and Chinese conglomerate Tencent. The technology promises safer, cheaper long-duration storage using abundant materials, crucial for integrating renewables into European and global grids.
Bottom line — XL Batteries targets a levelized cost below €0.05/kWh, while Quino projects costs one-quarter of vanadium systems.
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- XL Batteries signed an MOU with ENEOS Holdings to jointly study commercial deployment of its organic flow battery, which uses proprietary organic electrolytes in pH-neutral water, per Interesting Engineering.
- The company commissioned a paid pilot project at a Stolthaven Terminals facility in Houston in April 2025, according to BriefGlance.
- Quino Energy secured $10 million in Series A funding to scale its water-based organic flow battery, which uses quinones derived from coal tar, per the Sustainability Directory.
- Quino is preparing its first commercial deployment on Himandhoo Island in the Maldives, supported by Tencent's CarbonX Program, Tencent reported.
- Chinese Academy of Sciences researchers developed an alkaline all-iron flow battery achieving over 6,000 cycles with 99.4% coulombic efficiency, though no commercial roadmap exists yet, TechSpot noted.
- Flow batteries decouple power and energy, allowing longer duration by simply adding larger electrolyte tanks, a key advantage over lithium-ion for grid storage, explained Power Systems Design.
- XL Batteries was named 'Most Inspiring Startup' in the 2026 BloombergNEF Pioneer program for its potential to support data centers and grids, CleanTechnica reported.