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Going green with graphene

~ Spearhead projects show potential of “wonder material” in renewable energy ~

There is huge demand to find greener renewable alternatives to our traditional, finite energy sources. Now, graphene is unlocking new possibilities within the energy sector, creating a more efficient and sustainable future. Here, Francesco Bonaccorso, deputy head of innovation of the Graphene Flagship, explains how its researchers havecreated a series of initiatives in order to take graphene from the laboratory to the commercial market.

Since it was first isolated in 2004, graphene has become a hot research topic. Graphene has been embraced across a variety of industries, most notably healthcare and material applications. And, now, graphene technology is being applied to renewable energy.

World’s first graphene solar farm 
According to a 2019 report by the Financial Times, it is forecast that coal, oil and gas will still contribute about 85 per cent of the world’s primary energy supply by 2040, compared with 90 per cent today. While these figures underline the need to reduce the levels of dependence on non-renewable sources, another report stated that the global supplies of renewable electricity could expand by 50 per cent in the next five years – powered by a resurgence in solar energy.

Among the Graphene Flagship’s spearhead projects, a series of initiatives undertaken with partners, is its Solar Farm initiative. The project created the world’s first graphene-enabled solar farm in Crete, Greece. Led by its partner, the University of Rome Tor Vergata, a public research university in Rome, Italy, the project explores the production of graphene-enabled solar cells that could help bolster the European Union’s efforts to reduce dependence on fossil fuels.

In fact, the Solar Farm project has already seen great sustainability progress in developing its solar modules. This involves the production of large area graphene perovskite solar cells; single photovoltaic panels assembled from connected solar cells that are designed to increase the efficiency, and lower the cost, of solar energy. Researchers have already achieved power conversion efficiencies of 15.3 per cent with the technology, which is a remarkable result.

Going forward, the project aims to surpass this figure and pave the way towards the future exploitation of graphene-basedperovskite solar cells. In tandem configuration with silicon-based solar cells, it is foreseen to achieve power conversion efficiencies beyond present records.

Batteries for a better world
Reducing our reliance on non-renewable sources is one thing, but what about sustainable developments in energy storage? According to the Consortium for Battery Innovation (CBI), worldwide demand for battery energy storage will significantly increase in 2025, and graphene and related materials could play a vital role in meeting that rise.

With this in mind, another of the Graphene Flagship’s energy spearhead projects, entitled Technology of Silicon Graphene Lithium-ion Batteries for Large Scale Production, aims to increase the electrode quality of lithium-ion batteries. The project has advanced the integration of silicon-graphene composites into lithium-ion batteries for high-energy and high-power applications.

Due to its high surface area, large electrical conductivity, lightweight characteristics, chemical stability and high mechanical flexibility, graphene can increase the energy capacity, charge rate and stability of lithium-ion batteries. In practicality, the lifespan and recharging time of batteries used in electronic applications — ranging from electric vehicles and mobile phones to laptops — could significantly improve. 

Innovative projects like these can open the door to new areas of research and product design. To this end, the production of silicon-graphene lithium-ion batteries, coupled with the world’s first graphene-enabled farm, are just a few of the sustainability-focused projects that the Graphene Flagship is working on.

While it remains to be seen how graphene can transform the energy industry, its journey has only just begun in creating new opportunities for applications in energy storage and energy conversion. It seems likely that graphene and related materials could be exactly what is needed to help engineers find greener renewable alternatives to traditional materials to develop next-generation energy devices.

For more information about graphene and projects funded by the Graphene Flagship, please visit: graphene-flagship.eu.
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Editor’s note: The Graphene Flagship is one of the largest research projects funded by the European Commission. With a budget of €1 billion over 10 years, it represents a new form of joint, coordinated research, forming Europe’s biggest ever research initiative. The Flagship is tasked with bringing together academic and industrial researchers to take graphene from academic laboratories into European society, thus generating economic growth, new jobs and new opportunities.

Keep up with the latest from the Flagship here: https://graphene-flagship.eu/news

For further information contact: Dr. Fernando Gomollón-Bel, Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA
Telephone: +44 (0)1223 762391
Twitter:@GrapheneCA ‏
Facebook: https://www.facebook.com/GrapheneFlagship/

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Ref: TGF177/05/20

Francesco Bonaccorso is the Deputy Head of Innovation of the Graphene Flagship, the Co-founder and Scientific Director of BeDimensional S.p.A. and Visiting Scientist at IIT (Istituto Italiano di Tecnologia).

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