Technology and R&D

Compressed air energy storage (CAES) may become an interesting solution for countries with weak interconnection with their neighbors, according to scientists from Finland’s Lappeenranta University of Technology (LUT). North America and sub-Saharan Africa were found to have the largest portion of suitable areas for this kind of storage technology, and Western Canada in particular, to have the world’s strongest potential.

Researchers in the United Kingdom have built a 14%-efficient organic PV device that can be used in high-speed optical wireless communication systems. The cell consists of a 4×2.5mm photoactive layer fabricated with a bulk heterojunction of a polymer donor and fullerene and non-fullerene acceptors.

A well-designed rooftop solar system should last 20 or 30 years, or longer. This guide for choosing the right contractor should help ease your concerns.

Australia and Chile are both granting funds to green hydrogen projects and Denmark is exempting pilot power-to-gas projects from complying with its energy legislation. Furthermore, the Fraunhofer Institute for Applied Polymer Research IAP is working to find solutions for private customers to produce hydrogen.

Scientists in the UK reported a breakthrough in lithium-oxygen batteries, achieved by experimenting with different electrolyte compositions. Working with ionic liquids, they were able to tweak the electrolyte recipe to minimize unwanted reactions during battery cycling, and greatly improve on both performance and stability.

American Resources Corporation is developing a process to separate pure rare earth metals from lithium-ion batteries used in electric vehicles or power plants based on renewable energy. The technique is described as a two-zone ligand-assisted displacement chromatography (LAD) that is able to produce metals with high yields and purity of over 99%.

Scientists in China have analyzed the radiative cooling techniques used in combination with solar energy systems such as PV arrays, solar thermal collectors, and concentrated PV installations. They identified five major system typologies based on functionality and working time.

Arkolia has coupled a biogas purification plant in France with a 100 kW rooftop solar array.

The bifacial device showed a power conversion efficiency of 5.2% on the front side through an n-type contact and 2.7% on the rear side through a p-type contact.

Norway’s Glint Solar and the Norwegian Geotechnical Institute have developed an algorithm that is able to automatically calculate wave heights and wind directions at potential locations for floating PV arrays. It considers the geometry of the water surface as well as 40 years of data on wind conditions.