Environment & Engineering

Allegro: Supercapacitors Energy—super fast

Supercap Project

PhD student, Fraser Hughson

As fossil fuels become scarcer, the need to harvest and store energy from renewable sources has become more urgent. Batteries are increasingly being used in a suite of applications to help store and release energy for long periods of time. However, batteries take a long time to charge and are not suited to applications where energy is needed quickly. Supercapacitors are commonly used in high power applications that need energy quickly.

While supercapacitors are gaining traction in the marketplace (e.g. to help with accelerating a car or quickly stabilising supply and demand in a power grid), their electrolytes are highly toxic, corrosive and expensive to produce.

Fraser Hughson, a Victoria University of Wellington PhD student has discovered and developed a technology that could disrupt the way supercapacitors are made today—potentially achieving the same voltage as existing supercapacitors, while making them cheaper and more sustainable to produce.

Features and benefits

Sustainable materials

Today’s supercapacitors use highly corrosive, toxic electrolytes. Our electrolyte technology uses water-based materials which significantly reduces the toxicity of the supercapacitor and could help reduce any end of life considerations associated with disposal.

Lower cost, similar performance

To achieve acceptable performance, existing supercapacitors use expensive electrolytes which can reach up to 80% of the total cost of the supercapacitor. By avoiding expensive electrolytes such as “ionic liquids” and using aqueous materials, our supercapacitor can significantly reduce the cost without compromising performance.

Next steps

At the end of 2021, Allegro Energy was spun out to focus on the delivery of this technology, providing clean and green energy storage solutions for a renewable energy economy.

Julie Crisford

Head of Commercialisation

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