Validation of Safe, Water-Based, Organic Redox Flow Batteries for Large Scale Energy Storage

Priority research theme: Long Term Energy Storage
Awarded: Winter 2026

Overview

New Brunswick has committed to achieving net-zero greenhouse gas emissions by 2050, including net-zero electricity emissions by 2035. Meeting this target will require a major shift in energy generation, including expanded nuclear capacity alongside approximately 1,400 MW of wind and 500 MW of solar. Because these renewable sources are weather-dependent and intermittent, large-scale energy storage will be essential to maintain grid reliability—storing excess energy when supply exceeds demand and releasing it when needed. The province has already identified a need for at least 100 MW of new energy storage by 2035, with further expansion expected as technologies evolve.

Redox flow batteries (RFBs) are a promising solution for grid-scale storage. However, most existing systems rely on metal-based materials, such as vanadium, and use highly acidic, corrosive electrolytes. This project focuses on advancing organic RFB technology by developing new active materials that are safer, more cost-effective, and environmentally sustainable.

The research will design organic molecules with several key features:

• Multiple stable redox states, allowing the same material to function as both anode and cathode and reducing performance losses
• Two-electron transfer processes with higher cell voltage to increase energy density
• Tunable molecular structures derived from low-cost materials to improve solubility and long-term stability
• Water-based, neutral pH electrolytes that are non-flammable and non-corrosive

These innovations aim to improve energy density, lifespan, safety, and overall system cost compared to current technologies.

Expected outcomes include the development of patentable materials and validation of a next-generation, low-cost redox flow battery system. Ultimately, this project will support the deployment of reliable, scalable energy storage—helping New Brunswick achieve a resilient, low-carbon electricity system.