University of Surrey awarded close to £3 million funding for perovskite solar cell research
A consortium led by the University of Surrey has been awarded £3 million to help design perovskite solar cells to power wearable technologies and Internet of Things (IoT) devices.
Grant and Award AnnouncementA consortium led by the University of Surrey has been awarded close to £3 million to help design perovskite solar cells to power wearable technologies and Internet of Things (IoT) devices.
Crystalline silicon solar cells have dominated the solar market for many years, but they cannot power the rapidly growing portable electronics market, particularly that of wearables and IoT devices which are expected to reach trillions of units in the next few years. There are already over 20 billion IoT devices in the market that currently map and gather information, and 127 new devices are connected to the internet each second, leading to a potential IoT market worth US$1 trillion by 2023.
Therefore, it has become a necessity to develop cheaper materials together with scalable manufacturing techniques to further accelerate the uptake of solar electricity.
The team led by Surrey has received £2.3 million from the Engineering and Physical Sciences Research Council (EPSRC) and £500K from industrial partners to research, design and develop flexible perovskite photovoltaic devices that can be produced at a high volume and an ultra-low cost.
The research team is a partnership between Surrey and leading experts in perovskite photovoltaics from the Universities of Oxford, Sheffield and Cambridge. The team is also supported by partners including National Physical Laboratory, NSG Group, Swift Solar, Ossila, Oxford PV, Coatema and QinetiQ.
Professor Ravi Silva, project lead and Director of the Advanced Technology Institute at the University of Surrey, said: “We are grateful to the EPSRC and our industrial partners for the support they have shown this project. We are setting out to create a technology that can bridge the multi-scale energy needs of emerging markets -- and beyond this, also tackle the challenge of our age: climate change.
“We are confident that perovskite photovoltaics are a key part of the puzzle of meeting the net-zero emission target by 2050.”
Dr Wei Zhang, co-investigator of the project from the University of Surrey, said: “We are proud to work with some of the best research teams in perovskite photovoltaics. Success in our research will open the very large wearables and IoT power-source markets and will help power the increasing number of mobile wireless technologies.”
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Janus graphene opens doors to sustainable sodium-ion batteries
IMAGE: SODIUM IS ONE OF THE MOST ABUNDANT AND AFFORDABLE METALS IN THE WORLD. NOW RESEARCHERS AT CHALMERS UNIVERSITY OF TECHNOLOGY, SWEDEN, PRESENT A CONCEPT THAT ALLOWS SODIUM-ION BATTERIES TO MATCH THE CAPACITY OF TODAY'S LITHIUM-ION BATTERIES. USING A NOVEL TYPE OF GRAPHENE, THEY STACKED SPECIALLY DESIGNED GRAPHENE SHEETS WITH MOLECULES IN BETWEEN. THE NEW MATERIAL ALLOWS THE SODIUM IONS (IN GREEN) TO EFFICIENTLY STORE ENERGY. view more
CREDIT: IMAGE: MARCUS FOLINO AND YEN STRANDQVIST/CHALMERS UNIVERSITY OF TECHNOLOGY
In the search for sustainable energy storage, researchers at Chalmers University of Technology, Sweden, present a new concept to fabricate high-performance electrode materials for sodium batteries. It is based on a novel type of graphene to store one of the world's most common and cheap metal ions – sodium. The results show that the capacity can match today’s lithium-ion batteries.
Even though lithium ions work well for energy storage, lithium is an expensive metal with concerns regarding its long-term supply and environmental issues.
Sodium, on the other hand, is an abundant low-cost metal, and a main ingredient in seawater (and in kitchen salt). This makes sodium-ion batteries an interesting and sustainable alternative for reducing our need for critical raw materials. However, one major challenge is to increase the capacity.
At the current level of performance, sodium-ion batteries cannot compete with lithium-ion cells. One limiting factor is the graphite, which is composed of stacked layers of graphene, and used as the anode in today’s lithium-ion batteries.
The ions intercalate in the graphite, which means that they can move in and out of the graphene layers and be stored for energy usage. Sodium ions are larger than lithium ions and interact differently. Therefore, they cannot be efficiently stored in the graphite structure. But the Chalmers researchers have come up with a novel way to solve this.
“We have added a molecule spacer on one side of the graphene layer. When the layers are stacked together, the molecule creates larger space between graphene sheets and provides an interaction point, which leads to a significantly higher capacity,” says researcher Jinhua Sun at the Department of Industrial and Materials Science at Chalmers and first author of the scientific paper, published in Science Advances.
Ten times the energy capacity of standard graphite
Typically, the capacity of sodium intercalation in standard graphite is about 35 milliampere hours per gram (mA h g-1). This is less than one tenth of the capacity for lithium-ion intercalation in graphite. With the novel graphene the specific capacity for sodium ions is 332 milliampere hours per gram – approaching the value for lithium in graphite. The results also showed full reversibility and high cycling stability.
“It was really exciting when we observed the sodium-ion intercalation with such high capacity. The research is still at an early stage, but the results are very promising. This shows that it’s possible to design graphene layers in an ordered structure that suits sodium ions, making it comparable to graphite,” says Professor Aleksandar Matic at the Department of Physics at Chalmers.
“Divine” Janus graphene opens doors to sustainable batteries
The study was initiated by Vincenzo Palermo in his previous role as Vice-Director of the Graphene Flagship, a European Commission-funded project coordinated by Chalmers University of Technology.
The novel graphene has asymmetric chemical functionalisation on opposite faces and is therefore often called Janus graphene, after the two-faced ancient Roman God Janus – the God of new beginnings, associated with doors and gates, and the first steps of a journey. In this case the Janus graphene correlates well with the roman mythology, potentially opening doors to high-capacity sodium-ion batteries.
“Our Janus material is still far from industrial applications, but the new results show that we can engineer the ultrathin graphene sheets – and the tiny space in between them – for high-capacity energy storage. We are very happy to present a concept with cost-efficient, abundant and sustainable metals,” says Vincenzo Palermo, Affiliated Professor at the Department of Industrial and Materials Science at Chalmers.
More on the material: Janus graphene with a unique structure
The material used in the study has a unique artificial nanostructure. The upper face of each graphene sheet has a molecule that acts as both spacer and active interaction site for the sodium ions. Each molecule in between two stacked graphene sheets is connected by a covalent bond to the lower graphene sheet and interacts through electrostatic interactions with the upper graphene sheet. The graphene layers also have uniform pore size, controllable functionalisation density, and few edges.
CAPTION
Researchers at Chalmers University of Technology, Sweden, present a new concept to fabricate high-performance electrode materials for sodium-ion batteries. It is based on a novel type of graphene to store one of the world's most common and cheap metal ions – sodium. The results show that the capacity can match today’s lithium-ion batteries.
CREDIT
Image: Marcus Folino/Chalmers University of Technology
More on the research:
- The scientific article “Real-time imaging of Na+ reversible intercalation in “Janus” graphene stacks for battery applications” was published in Science Advances and is written by Jinhua Sun, Matthew Sadd, Philip Edenborg, Henrik Grönbeck, Peter H. Thiesen, Zhenyuan Xia, Vanesa Quintano, Ren Qiu, Aleksandar Matic and Vincenzo Palermo.
- The researchers are active at the Department of Industrial and Materials Science, the Department of Physics and Competence Centre for Catalysis at Chalmers University of Technology, Sweden, Accurion GmbH, Germany and Institute of Organic Synthesis and Photoreactivity (ISOF) at the National Research Council of Italy.
- The research project has received funding from the European Union’s Horizon 2020 research and innovation program under GrapheneCore3 881603–Graphene Flagship, FLAG-ERA project PROSPECT, the Chalmers Foundation and the Swedish Research Council. The calculations were performed at C3SE (Gothenburg, Sweden) through an SNIC grant. This work was performed, in part, at Myfab Chalmers and Chalmers materials analysis laboratory.
For more information, please contact:
Jinhua Sun, Researcher, Department of Industrial and Materials Science, Chalmers University of Technology, +46 76 960 99 56, jinhua@chalmers.se
Aleksandar Matic, Professor, Department of Physics, Chalmers University of Technology, +46 31 772 51 76, matic@chalmers.se
Vincenzo Palermo, Affiliated Professor, Department of Industrial and Materials Science, Chalmers University of Technology, Sweden; Director, Institute for Organic Synthesis and Photoreactivity, CNR, Bologna, Italy, +39 051 639 97 73 or +39 051 639 98 53, palermo@chalmers.se
JOURNAL
Science Advances
METHOD OF RESEARCH
Experimental study
SUBJECT OF RESEARCH
Not applicable
ARTICLE TITLE
Real-time imaging of Na+ reversible intercalation in “Janus” graphene stacks for battery applications
ARTICLE PUBLICATION DATE
28-May-2021
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