XL Batteries launches first commercial organic flow battery
XL Batteries, a Massachusetts-based company, has announced the launch of its first fully integrated, commercial organic flow battery.
The installation, carried out as part of a paid pilot project in cooperation with global storage terminal operator Stolthaven Terminals, has been deployed in Houston, Texas, and is expected to operate for the next 20 years.
Technology Based on Organic Chemistry and Water
Unlike most flow batteries, which rely on rare or hazardous elements like vanadium, XL’s solution uses proprietary organic molecules in a neutral saline solution. The result is a safe, non-flammable, and highly scalable technology that — according to the company — maintains high performance with minimal degradation for up to two decades.
“This is a breakthrough moment not just for our company, but for the entire industry,” said Tom Sisto, co-founder and CEO of XL Batteries. “We’re demonstrating that energy storage can be safe, cost-effective, and independent of global supply chains.”
From Lab to Industry
XL Batteries originated from Columbia University, where Sisto — then a chemist — discovered a key electrolyte molecule while researching solar cells. Its exceptional electrochemical stability became the foundation for the new technology.
XL’s technology is a classic flow battery: all active ingredients remain in liquid form and flow through a reactor. The company replaces costly fluorinated membranes with more affordable, corrosion-resistant desalination membranes.
The pilot project in Houston marks the first industrial-scale use of XL Batteries’ system. The partner, Stolthaven Terminals, plans to use the installation for energy storage near its terminals and potentially to power docked ships.
“This is a vital step in our journey toward sustainability,” said Guy Bessant, President of Stolthaven Terminals. “Our partnership with XL Batteries is an example of how innovation and collaboration can fundamentally transform the energy industry.”
A Safe Alternative to Lithium-Ion Storage Systems
XL Batteries aims to fill a gap in the U.S. market, which increasingly demands energy independence and infrastructure safety. In light of the growing number of fires in lithium-ion storage systems, water-based systems using organic molecules offer a safer and more socially acceptable alternative.
“People understand that energy storage is necessary — but they need to be confident it’s safe,” Sisto emphasized. “That’s why demonstration projects like ours are so important.”
A New Chapter in Long-Term Energy Storage
The commercialization of organic flow batteries could be a significant step in the energy transition — not only in the U.S., but globally. Thanks to its design, XL’s technology allows for low-cost capacity expansion (simply by increasing tank size), while avoiding dependence on foreign raw material suppliers such as China or Russia.
The launch of the system in Houston is the first step toward broad adoption of this technology. The company plans further commercial projects and system optimization based on real-world performance data.
Source: businesswire.com