Low-Cost, Intrinsically Safe, and Eco-Friendly Polysulfide Redox Flow Battery
To achieve carbon neutrality, the global expansion of renewable power is essential, but its intermittent nature makes long-duration energy storage (LDES) crucial for stabilizing power generation. Current solutions, such as Li-ion batteries, face significant challenges including safety risks, resource scarcity, and recycling issues, highlighting the need for safer, reliable, and eco-friendly alternatives.
Sulphur flow batteries offer a promising solution by using low-cost, earth-abundant materials and storing energy in non-flammable, water-based electrolytes. The battery cost is estimated to be 1/2 of Li-ion and 1/4 of vanadium flow batteries. However, traditional designs suffered from short lifespans and low energy efficiency due to polysulfide crossover and slow reaction kinetics, limiting their commercial viability.
The technology owner has developed a breakthrough solution to addresses these challenges. This intrinsically safe, cost-effective, and eco-friendly battery features a proprietary membrane, 20 times cheaper and more selective than commercial Nafion, eliminating polysulfide crossover and improving energy efficiency. Advanced catalysts further enhance reaction rates, resulting in a projected lifespan of over 15 years - double that of Li-ion batteries. Successful pilot production using large-scale roll-to-roll manufacturing has led to the world's first commercial sulphur flow battery with an industrial-grade lifespan. The system charges during off-peak hours and discharges during peak demand, reducing electricity costs by up to 70%.
The technology owner is seeking partners to integrate this battery into industrial test-bed sites, including renewable power generation, EV charging stations, and data centres. They are also interested in co-developing energy storage ecosystems in Singapore and establishing supply chain partnerships.